Pycnanthemum verticillatum var. pilosum seedlings emerging

A gardener runs the risk in long winters that the anxious sowings of January, February and March yield far more plants than s/he knows what to do with come April and May. I’m not far from these circumstances, and I still seem to be sowing. Against all advisable best practices, I’ve sowed seeds of things I don’t even intend to plant should they emerge, at least this year. What nursery will they grow in until they have a garden home? I haven’t figured that out yet. Against any wisdom I probably should have by now, I’ve sowed more seeds of certain things I intend to plant than I have room, space or energy to deal with. Every seed of Salvia azurea ‘Nekan’ appears to have germinated. Why did I sow three cells of it? The same is true of Pycnanthemum verticillatum var. pilosum, which is vigorous enough to account for any deficit of seedlings I might have had. No worry now.

I suppose I can’t entirely blame the long winter. With this new house came a finished basement, which I’ve appointed with all the trappings of an indoor seed-starting operation. I last did this when I was all of 11 or 12 years old, retrofitting basement beams and rickety tables in my parents’ rather primitive, farmhouse basement. I sowed heirloom sweet peas and morning glories, tomatoes, peppers and even tried my hand with Phlox drummondii and daylilies (from a cross I’d made the summer before). There were probably more, but these were the few sun-faded, stained packets I found tucked tucked away into a journal while unpacking boxes last week. I don’t recall much from the daylilies and phlox, but do remember some pretty spectacular showings of sweet peas and morning glories (see Ipomoea ‘Mt. Fuji Mix’). The memories of plants grown from seed linger longer for some reason.

There’s something about sowing seeds and raising plants that cultivates a deeper understanding of the subject than simply digging holes. It may not be much, admittedly, but it’s just a little more time and insight into their growth and tendencies that’s all old news by the time you find it on a bench at the garden center. It also feeds the ego of the human experience to cosset small living things which we feel emotionally invested in and watch them grow. Plus, it’s a good way to garden on the cheap or to grow exactly what you want–so often the treasures aren’t on nursery benches or in mail-order catalogs anywhere.

What else am I growing from seed? Here’s a list of highlights, most of which will end up in the Long Look Prairie or Meadow Nord:

Helianthus helianthoides var. scabra ‘Bleeding Hearts’, a new selection from Jelitto dangerously similar in name to ‘Burning Hearts’, which seems to be earning most of the commercial attention. ‘Bleeding Hearts’ offers semi-double orange flowers against purple foliage. I’m fascinated.

Stipa extremiorientalis from seed given to me by Panayoti Kelaidis. A new Stipa to me! I think it will be interesting to see how well this central Asian species fares on my clay soil with its handsome flowering display somewhere between wispy and spiky.

Asparagus verticillatus, also from Panayoti, is a hardy stalwart and climber (every family has one). The late great plantsman Harlan Hamernick popularized this plant through Bluebird Nursery for its beautiful foliage and ample autumn fruiting; totally head-turning when appropriately draped over an arbor.

Silphium albiflorum  is something I grew and flowered at the farm for awhile until it bloomed and died. I’m eager to get plants going here at Three Oaks and at Greater Des Moines Botanical Garden. It’s alluring and almost hauntingly white flowers are etched in my memory.

Sanguisorba canadensis is our native North American member of the highly popular genus.  It loves wet feet, as so many do, so I’m hoping to incorporate it at the transitional edge of the prairie and the bioswale to the west.

I often get asked where I procure seeds. While I often trade seeds with other plantsmen or swap through plant society seed exchanges, here are four seedhouses I frequently patronize:

Gardens North (although 2018 will be Kristl Walek’s last year in business, unless it sells to a new owner)

Jelitto

J.L. Hudson

Prairie Moon Nursery

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In an earlier post, I discussed the foundations of my Meadow Nord planting schemes and the inherent complexity of gardens wilder with intention, modeling the behaviors and patterns of natural systems. The history of art and architecture has often vacillated between simple and and complex movements, each with their own intellectual arguments.The history of horticultural plantings is remarkably simplistic, born of an almost purely aesthetic vision (which isn’t bad, if only it weren’t so one-dimensional or boring). I disagree with simplicity for simplicity’s sake and am planting my own argument in favor of a legible exuberance at the overlap of form and function. I’ll have it wilder, please.

To that end, I planted 80 taxa in phase 1. A dozen or so taxa weren’t available or were backordered until spring, bringing the unofficial count to somewhere north of 90. In my previous post, I described the process of planting the meadow and explained a little bit about how dense planting schemes don’t always make sense mathematically (after the remaining plants are installed this coming spring, Meadow Nord will have 116% of its square footage covered in green matter, assuming a theoretical survival rate of 100%, of course). I’m most excited to see how this assorted assemblage forms its own patterns over time. A planting scheme like this is never really “stable,” as the composition of the community will shift interminably. But it can be durable, an idea I wish we would talk more about in landscape design. I have no illusion that every planting choice I’ve made will work out or that every placement is permanent. But I hope for durability of my assumptions over time as each planting decision occurs within a range of tolerances.

Plant List and Sources

A word about the column heads. Phase, Taxa and Cultivar are fairly obvious. I separate cultivar names into separate fields so I can sort by cultivar within diverse genera like asters, for example.

Component contains labels I often use throughout my design process and in Plants With Style: matrix, structure, emblems, vignettes, kitsch.

I liberally defined the bands for Seasonal Interest. I used approximate dates based on previous experience in Iowa when applicable. For others that I haven’t experienced, I used a guesstimate. For groundcovers like Tiarella, I counted the period from flowering through the time when their leaves start to sag a little in the summer heat. This isn’t to say they wouldn’t contribute ornamentally outside of this period, but the design isn’t relying on it exactly. Here is an example of how I used this data to create a phenologic chart using a Gannt chart template in Excel.

A sample Gantt chart generated from a free Microsoft Excel template.

A sample Gantt chart generated from a free Microsoft Excel template.

% of planting signifies the percentage of the entire planting occupied by that taxa. 0% entries result when a species falls below 1%.

Order Qty. indicates the number of units ordered for that taxa. Taxa grown from seed only have 1 unit indicated because I purchased 1 seed packet. I track it this way for costing purposes so I don’t have to break out costs per seed (the rest of the spreadsheet calculates individual costs per plant).

I relied on several Sources to procure this beautiful chaos. Most companies are recognizable. GDMBG stands for Greater Des Moines Botanical Garden indicating plants I purchased through our Spring Garden Festival or propagated from collections I’ve made on behalf of the Garden. My own initials (KDN) or Rainbow Iris Farm (RIF) indicate plants procured from my nursery and garden at my family’s farm.

Meadow Nord Plant List

PhaseTaxaCultivarComponentSeasonal Interest STARTSeasonal Interest END% of plantingOrder QtySource
phase 1Agalinis auriculataKitsch20-Aug10-Sep0.001Prairie Moon Nursery
phase 1Agalinis tenuifoliaKitsch20-Aug10-Sep0.001Prairie Moon Nursery
phase 1AgastacheVelvet CrushVignettes17-Jul11-Sep0.0130Intrinsic Perennial Gardens
phase 1Allium stellatumVignettes7-Aug4-Sep0.0350Bluebird Nursery
phase 1Amorpha nanaStructure1-Jul30-Jul0.0232Bluebird Nursery
phase 1Amsonia tabernaemontanaStorm CloudVignettes8-May5-Jun0.013GDMBG (SGF)
phase 1Amsonia tabernaemontanaShort StopVignettes8-May5-Jun0.0112Intrinsic Perennial Gardens
phase 1Anemonopsis macrophyllaEmblems1-Jul15-Jul3Opus Plants
phase 1Antennaria neglectaMatrix1-Apr15-Sep0.0250New Moon Nursery
phase 1Antennaria plantaginifoliaMatrix1-Apr15-Sep0.01100Pizzo Native Plant Nursery
phase 1Aquilegia canadensisCorbettEmblems24-Apr15-May0.0250New Moon Nursery
phase 1Aronia melanocarpaIroquois BeautyStructure15-May30-Oct0.015GDMBG (plants)
phase 1Aster x frikartiiMonchVignettes15-Aug15-Sep3GDMBG (SGF)
phase 1Boltonia asteroidesJim CrockettEmblems15-Aug15-Sep5GDMBG (SGF)
phase 1Calamagrostis brachytrichaVignettes21-Aug30-Oct0.0132Stonehouse Nursery
phase 1Calamintha nepetaBlue CloudVignettes5-Jun31-Jul0.0132Stonehouse Nursery
phase 1Callirhoe digitataKitsch15-Jun1-Aug0.001Prairie Moon Nursery
phase 1Camassia scilloidesEmblems1-May15-May32Pizzo Native Plant Nursery
phase 1Carex albicansMatrix1-Apr15-Sep0.05150New Moon Nursery
phase 1Carex blandaMatrix1-Apr15-Sep0.05150New Moon Nursery
phase 1Carex pensylvanicaMatrix1-Apr15-Sep0.06200Greenwood Propagation
phase 1Carex sprengeliiMatrix1-Apr15-Sep0.04100New Moon Nursery
phase 1Carex woodiiMatrix1-Apr15-Sep0.0250New Moon Nursery
phase 1CaryopterisSapphire SurfStructure1-Aug15-Sep0.018Bailey Nurseries
phase 1CaryopterisBeyond MidnightStructure1-Aug15-Sep0.016GDMBG (SGF)
phase 1Cleome serrulataKitsch15-Jul10-Sep0.001GDMBG (seed)
phase 1Dalea purpureaVignettes3-Jul31-Jul0.0132GDMBG (plants)
phase 1Delphinium tricorneEmblems1-May15-May0Prairie Moon Nursery
phase 1Deschampsia caespitosaPixie FountainsMatrix1-Apr15-Sep0.04128Stonehouse Nursery
phase 1Desmanthus illinoensisKitsch20-Jun1-Oct0.001KDN/RIF
phase 1Diarrhena americanaMatrix1-Apr15-Sep0.0276Midwest Groundcovers
phase 1DiervillaKodiak BlackStructure1-May30-Oct0.018GDMBG (plants)
phase 1Dodecatheon mediaVignettes23-Apr21-May0.0176Pizzo Native Plant Nursery
phase 1Eragrostis spectabilisMatrix7-Aug4-Sep0.0370Intrinsic Perennial Gardens
phase 1Eragrostis spectabilisMatrix7-Aug4-Sep0.0250North Creek Nurseries
phase 1Euphorbia corollataVignettes7-Aug28-Aug0.011Prairie Moon Nursery
phase 1Galium odoratumMatrix1-Apr30-May0.0264Stonehouse Nursery
phase 1Geranium maculatumEspressoVignettes24-Apr26-Jun0.0132North Creek Nurseries
phase 1Geum triflorumMatrix1-Apr1-Jul0.0250GDMBG (plants)
phase 1Gillenia trifoliataPink ProfusionVignettes1-May21-Aug0.0232North Creek Nurseries
phase 1Glaucium hybridsKitsch15-Jun15-Sep0.001Panayoti Kelaidis
phase 1Helianthus salicifoliusFirst LightVignettes1-Sep30-Sep0.0150North Creek Nurseries
phase 1Hypericum kalmianumCobalt-N-Gold™Structure1-May30-Oct0.0116Bailey Nurseries
phase 1Iris (miniature tall bearded)variousEmblems1-May15-May0.01KDN/RIF
phase 1Iris cristataEmblems1-May15-May50New Moon Nursery
phase 1Iris kochiiEmblems1-May15-MayKDN/RIF
phase 1Mentha longifloraVignettes1-Aug30-Sep0.015Arrowhead Alpines
phase 1Molinia caeruleaMoorflammeMatrix1-Jul15-Sep0.0276Midwest Groundcovers
phase 1Monarda bradburianaVignettes8-May5-Jun0.0250New Moon Nursery
phase 1OenotheraLemon DropVignettes19-Jun17-Jul0.015GDMBG (SGF)
phase 1Packera plattensisVignettes17-Apr15-May0.021Prairie Moon Nursery
phase 1Patrinia punctifloraVignettes7-Aug28-Aug0.015Opus Plants
phase 1PenstemonPocahontasVignettes22-May19-Jun0.0250Intrinsic Perennial Gardens
phase 1Penstemon digitalisPrairie SplendorVignettes22-May19-Jun0.0232Bluebird Nursery
phase 1PhloxOpening Act BlushVignettes15-May15-Jun5GDMBG (SGF)
phase 1PhloxForever PinkVignettes22-May19-Jun0.0132Stonehouse Nursery
phase 1Phlox divaricataBlue MoonVignettes24-Apr15-May0.0250New Moon Nursery
phase 1Physocarpus opulifoliusFestivus GoldStructure1-May30-Oct0.018GDMBG (SGF)
phase 1PolemoniumHeaven ScentVignettes1-May22-May0.0272Intrinsic Perennial Gardens
phase 1Prunella grandifloraVignettes29-May12-Jun0.0132Bluebird Nursery
phase 1PulmonariaShrimps on the BarbieVignettes15-Apr15-Jul5GDMBG (SGF)
phase 1Ruellia humilisMatrix10-Jul14-Aug0.0250New Moon Nursery
phase 1Salix repensBridal RiceStructure1-Apr30-Oct0.018GDMBG (plants)
phase 1Salvia moorcroftiana x indicaVignettes1-May5-Jun0.0132Bluebird Nursery
phase 1Salvia verbenacaVignettes1-Jun1-Aug3Flowers by the Sea
phase 1SanguisorbaBlackthornVignettes17-Jul7-Aug0.013Opus Plants
phase 1Scutellaria incanaVignettes17-Jul14-Aug0.0250New Moon Nursery
phase 1Sedum takesimenseVignettes26-Jun31-Jul0.0120KDN/RIF
phase 1Silene stellataVignettes26-Jun10-Jul0.020Pizzo Native Plant Nursery
phase 1Sisyrinchium angustifoliumLucerneVignettes10-May12-Jun0.0132Stonehouse Nursery
phase 1Solidago drummondiiVignettes4-Sep16-Oct0.0120KDN/RIF
phase 1Solidago odoraVignettes4-Sep16-Oct0.0250New Moon Nursery
phase 1Sporobolus heterolepisTaraMatrix1-Jul15-Sep0.0136Midwest Groundcovers
phase 1Symphyotrichum cordifoliumSnowstormVignettes21-Aug11-Sep0.018KDN/RIF (transplant)
phase 1Symphyotrichum ericoidesBridal VeilVignettes21-Aug11-Sep0.0132Stonehouse Nursery
phase 1Symphyotrichum lateriflorumPrinceVignettes11-Sep1-Oct0.015Opus Plants
phase 1ThalictrumNimbus PinkVignettes15-May1-Jun5GDMBG (SGF)
phase 1TiarellaNew Moon MotleyMatrix15-Apr30-Jun0.03100New Moon Nursery
phase 1TiarellaSylvan LaceVignettes15-Apr30-Jun0.015GDMBG (SGF)
phase 1Zizia aureaVignettes22-May12-Jun0.031Prairie Moon Nursery
phase 2Asarum canadensisEmblems0.0130Greenwood Propagation
phase 2Asclepias exaltataVignettes0.0138Pizzo Native Plant Nursery
phase 2Asclepias tuberosaBlonde BombshellVignettes0.01Walter's Gardens
phase 2Ceanothus americanusmy collectedVignettes0.013GDMBG (plants)
phase 2Dianthus knappiiVignettes0.0132KDN
phase 2EchinaceaKismet RedVignettes0.0150Terra Nova Nurseries
phase 2Erigeron pulchellusLynnhaven CarpetVignettes0.01North Creek Nursery
phase 2EurybiaTwilightVignettes0.0150New Moon Nursery
phase 2Lamium orvalaVignettes24-Apr15-May0.0132Stonehouse Nursery
phase 2Liatris ligulistylisVignettes0.0250New Moon Nursery
phase 2Millium effusumYaffleVignettes27-Apr5-Sep0.015Opus Plants
phase 2Oligoneuron albumVignettes19-Jun17-Jul0.0132Taylor Creek Nursery
phase 2Tradescantia bracteataKrystalVignettes22-May26-Jun0.01KDN/RIF (transplant)

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[The balance of this post was drafted in October after most of the meadow was planted. The last two months seem to have escaped in a blur of travel and other obligations, but rather than rewrite the post into a more current tense, I have preserved its original context.]

October rumbles and autumn warbles–the organic music of a Saturday at home at Three Oaks. After months of parching weather, rains came earlier this month, a glad tiding for a gardener weary from watering. The yellow-rumped warblers passed through the hedgerow as the weather changed, playfully alighting the branches of the hackberries behind the house. Their ornithological acrobatics seemed ritualistic, a brief stopover for sustenance and rest on an only-just-commenced, neotropical journey. I’m delighted by these natural cadences and rhythms in my new landscape home.

Now that cold weather has settled in, I seem to have found a little more time for reflecting on “the project” this fall. A pair of shoes by the back door is encrusted with brown clay, the rich if not tacky substrate I’ve made a garden in. My notes are hasty inscriptions on the reverse of invoices and box lids. I typed a few into Evernote for each of the posts I imagined while hunched over planting. I have a pile of seed packets to frost sow, the timing for which might come soon enough. October 27 marked our first frost, a few weeks ahead of the last couple of years, but still later than the 20-year average in Des Moines, Iowa.

The next chapter of the Meadow Nord story–actually planting it–will require two posts. Here I have documented the approach, the layout and planting. In the following post, I’ll publish the plant list and my remarks about particular planting choices.

Planting Approach

Only the beginning of the pile of pots in the driveway! Photo by Deb Wiley.

The scale of this project (3,200 square feet) led me to install most plants (78%) as landscape plugs (from 32, 38 or 50-cell trays). For starters, it’s cheaper, but it’s also vastly more practical. For years, research has demonstrated that plants established from landscape plugs reach the same size within a year as plants established from one gallon pots, an insight that would seem to have disruptive potential for the horticulture and landscape industries, if consumer’s value perception followed suite (this study underscores what we might assume: people perceive larger plants to have more value. This pattern is also documented in trees, as well.) Plus, who likes digging big holes? I elected to install some plants at larger sizes (1-gallon or more), particularly slow-growing species like Amsonia and Baptisia that would scarcely have a chance of establishing if installed as plugs. A few slow-growing grasses like Sporobolus heterolepis ‘Tara’ were only available in 1-gallon pots, too. Species that I propagated myself, like my beloved Solidago drummondii (cliff goldenrod), were planted as quarts or 4.5″ diameter pots.

One of the overriding principles of New Naturalism is considering the landscape in ecologically dynamic layers and dimensions, so much so that when composing planting palettes, you have to plant more than 100% of the square footage. At first blush, this might sound confusing or impossible. Square footage is only a two-dimensional consideration of the landscape, which doesn’t account for the inherent complexity or interactions between the matrix, structure and the seasonally charged vignettes that come to make the garden functional and interesting. Traditional design simply chalks up the space between plants as something that “fills in over time,” which isn’t inaccurate but doesn’t define what fills in or how. Weeds or opportunists will happily do the job, while the balance of your intentions struggle to gain a foothold. In reality, a single unit of square footage is the frame for a three-dimensional column of plantable layers–vertical and horizontal–that plants can occupy many times over. These competitive relationships–roots fighting for water and nutrients and leaves shading each other–are the building blocks of sustainable plant communities.

Plugging Away

A man, a spray can and a mission. Photo by Deb Wiley.

Furthermore, embracing plant schemes as matrices as opposed to discrete groupings complicates not only rendering the design but the logistics for installing it. Some designers use map-like grids and organize plant material accordingly. Admittedly, I wish I had, although no strategy is perfect. Most of my plants were on-site when the planting process began, but several key ingredients were backordered for a few weeks, which added additional headaches (nothing unusual, frankly). In the end, my installation process followed my design process, which begins with matrix and structure and concludes with crafting artful vignettes; work first, play later. I walked over ground more times than ideally efficient, but with each pass, the vision for the design became clearer. I edited along the way and shifted course when the circumstances warranted. I couldn’t stop. I wanted to bum a head lamp and plug away, water, pull hose, putz. I’d waited all year for this moment to create something for myself. I selfishly cursed the sunset, even as it cast a strange silver glow over the meadow. I’m grateful for a “village” approach to planting with invaluable assistance from family and friends over the course of two weeks of intense planting.

Friends joined in the planting effort on Labor Day weekend. Photo by Deb Wiley.

Watering in the dark became the ritual to end my day even as the mosquitoes attempted to make dinner of my legs and arms. I purchased a small-scale Rain Bird automatic irrigation system as a means of temporary irrigation during the establishment period, though I continued to hand water areas it didn’t cover. The first few weeks were critical given that we received very little rainfall. This may have been the best $120 I’ve ever spent. The system could be permanent, but rather than trench and deal with water source issues, I rigged up a garden hose from a spigot on the side of the house as the feeder line and set the programming to run twice a day for about an hour. With all that clay soil, I calibrated that regimen to just once per day after a week to avoid inundating and drowning plants.

Within a few weeks, new growth showed on most of the grasses, sedges and forbs. Robins and cedar waxwings played in the soft spray of the irrigation heads each morning, dabbling their wings in the shallow puddles that accumulated on the cardboard scraps that traced the paths during the planting process.

 

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Sporobolus heterolepis 'Tara'

Sporobolus heterolepis ‘Tara’, a dwarf form of the species, is one of the showier plants of the matrix layer.

Plants are the very essence of a garden’s style, the ingredients with which we plant indelible memories and emotional experiences. I’m unabashedly obsessed with these components, the materials for making beautiful and functional landscapes, so much so that my process for making gardens begins with a consideration of the details. Many professional designers might scoff at that approach, favoring something more conceptual layered with successive amounts of detail (of which plants are often last). But the design process, or dare I say the process of expressing and fusing nature and humanity in a common landscape, isn’t linear. It’s spasmodic and at times perambulating, a journey through understanding place.

The concept for Meadow Nord evolved early and fast, something I felt sure about given the context of the land. The savanna archetype–the interstitial ecological zone between forest and grassland–felt especially right given the species composition of nearby parkland (which effectively envelopes my neighborhood to the west, south and east). Oak trees hold forth in canopy and sedges reign below; the sunnier edges give rise to Elymus spp. (wild rye) and Schizachyrium scoparium (little bluestem). For the last few weeks, Gentiana alba (cream gentian) and Symphyotrichum cordifolium (blue wood aster) have flowered in succession, following on the heels of a monthlong profusion of Rudbeckia triloba (brown-eyed susan), which seems to grow in all the neighborhood gardens. Though the product of disturbance in an urban-influenced environment, the local diversity is seasonally rhythmic and inspiring.

(I even found small outcroppings of Diarrhena obovata, our local beakgrass much beloved by wild turkeys. My friend and fellow plantsman Allen Bush just wrote about the more eastern species of Diarrhena on Garden Rant. These aren’t the showiest of grasses (nor do they have the best name), but they are remarkably functional and serviceable.)

This isn’t to say that ecology drove the decision entirely. I wanted something to connect my house, a two-story 1941 Colonial Revival, to the extensional parkland landscape. I was already blessed with the noble canopy of oaks to frame the view from the street, so this planting could afford looseness so long as it abided by the boundaries. The planting scheme in most places won’t grow over 3-feet tall and with more than 125 linear feet of curb, even if a few plants tower to greater heights, they won’t disrupt the composition as it sweeps over the front yard. I’ve planted the beginnings of a minimal and informal hedge at the foundation of the house featuring, among other things, Hydrangea arborescens ‘Haas’ Halo’ and Aronia melanocarpa ‘Iroquois Beauty’. Additionally, most of the structural plant groupings in the meadow contribute to the effect while not overwhelming the house.

Understanding Soil

On a hill above the river set in a neighborhood called Oak Park, I wasn’t surprised to find “loamy upland forest” soil, as described by the USDA’s Web Soil Survey. Those soil surveys build on historical data recalibrated every so often by contemporary usage, climate, etc. In cities, soils often fall into “complexes” variously described by their parent historical soil type (in my case the Hayden series) appended with the reminder that in urban environments, the soil underfoot might be as far removed from its natural history as you could imagine. The Hayden series is a calcareous, glacial loam with moderate to high alkalinity; the standard stuff of central and northern Iowa and southern Minnesota.

Durable Assumptions

My goal with planting Meadow Nord wasn’t to create perfection within a frame, but instead operate within a realm of durable assumptions. Every gardener makes assumptions about plants. Occasionally, we plant something with a hope and a prayer, but more often than not, we intend for a plant to do something on account of its size, ornamental traits or the position we’ve given it in the garden. Plants aren’t always so compliant. In a 3,200 square foot meadow, you can measure assumptions by the yard.  My spreadsheet notes about the matrix layer reveal a combination of insights, intentions and hopes that this novel assortment of players works together in concert.

Antennaria neglecta Matrix Full sun; driveway edge
Antennaria plantaginifolia Matrix Part sun, dry shade; path edges
Carex albicans Matrix Clumper, sun + part shade
Carex blanda Matrix Rhizomatous, savanna edge; groundcover for taller grasses
Carex pensylvanica Matrix Rhizomatous, shade
Carex sprengelii Matrix Rhizomatous, shade; likes moisture
Carex woodii Matrix Rhizomatous, dry shade; under oak
Deschampsia caespitosa Pixie Fountains Matrix Clumper, sun + part shade
Diarrhena americana Matrix Full shade; oak tree
Eragrostis spectabilis Matrix Full sun; driveway edge
Eragrostis spectabilis Matrix Full sun; driveway edge
Galium odoratum Matrix Full shade
Geum triflorum Matrix Full sun; open areas
Molinia caerulea Moorflamme Matrix Full sun; open areas
Ruellia humilis Matrix Full sun; open areas
Sporobolus heterolepis Tara Matrix Full sun; open areas
Tiarella New Moon Motley Matrix Full shade; oak tree

My personal challenge was to experiment with plants beyond the realm of my hands-on experience. I gambled lightly on the matrix (as critical of a layer as this, I felt more comfortable planting known quantities); only six taxa above are new to my gardening experience:

  • I have admired Antennaria plantaginifolia since I encountered it in the Ozarks in 2009. It’s a remarkable, durable plant of the savanna understory with dashing silver foliage.
  • Carex albicans, C. blanda and C. woodii are new sedges to me, though in the case of C. blanda, I’m sure I’ve weeded it out of my woodland garden at the farm over the years, unknowing and indignant of its value.
  • I mentioned Diarrhena americana and the more Midwestern native D. obovata already in this post. I have my own seed collections of the latter, which I would have rather experimented with, but not in the quantity I ultimately needed. D. americana was available from Midwest Groundcovers and suffices ornamentally and functionally for the same purpose (and from what I can tell already, the turkeys that trek through my garden happily consume its seeds).
  • For as many heuchera and tiarella as I’ve killed over the years (and for as many as I love and adore), Tiarella ‘New Moon Motley’ was a strain from New Moon Nursery with red-marked leaves and a robust running habit that I hadn’t encountered before. It features prominently in a groundcovering role underneath the canopy of Big Bur.

Post-planting, I have confidence in my approach and palette, but could use additional Carex albicans, which as a sun-tolerant and clump-forming sedge has a lot of value for my site given its exposure and the floral complexity of the above-ground layers (which I’ll break down and detail in future posts). It’s good for intermingling, a polite and unfussy socializer. I could say the same of Eragrostis spectabilis, but I know it will eventually move its way into the handful of spots where I wish there was more. While the matrix layer of plants doesn’t attract as much attention in horticulture as it should, it’s critical to success in these complex-by-design plantings.

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