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The rock garden

 

The rock garden takes up only a small area in our overall scheme - but it's one of my favorite areas. And since it straddles the front walkway, we all get to admire it up close every day.

I can't call myself a rock garden afficionado - that would mean I'd know the ins and outs of alpine soil types, know how to place all the rocks for the most authentic look, and I'd feel comfortable throwing words like "scree" about. But I learned early on that a rock garden is the best way to showcase small perennials, especially those that require excellent drainage. And a few years ago I finally joined the North American Rock Garden Society (NARGS), so I guess that officially makes me a rock gardener.

To provide for the needs of those small perennials, our rock gardens are somewhat elevated from yard level, and the native clay has been generously amended with sharp sand, granite grit, rocks dug up from other garden areas (there's a use for everything in our garden), and some compost.

Our original rock garden was a strip between the driveway and the front walkway. It is badly in need of help at this point - the yucca we planted there originally gave up, but left lots of babies that come up all over, amid the tangle of various creeping or sprawling thugs, such as Kamtschat, blue-spruce and dragon's blood sedums, myrtle spurge, catmint, woolly thyme, and sea thrift. We now call this part the rock garden annex.

The newer part of our rock garden, carved out of a corner of our front yard, was originally called the "front corner", but steadily morphed into a rock garden. It is now our main showcase for small alpine species. The photo above was taken a couple months after the most recent upgrade, with many of the plants coming into their own nicely. The blooming specimens include Dracocephalum nutans, Linum campanulatum, Sedum kamtschaticum, Coreopsis auriculata, and Penstemon hirsutus. The photo below shows the garden on the same day in late May, from the opposite direction.

A problem with the rock garden is that I like it so much, I make it just a little bigger every year. That's fine with most types of garden - just cut away a foot width of grass, plant some low-growing perennials in the newly plantable area, and voila! But with a rock garden, it means rearranging the whole deal, to maintain a semblance of slope (I'm not pursuing the boulder field look) and natural rock placement. Ah well, it keeps me busy.

A list of plants we grow in the main rock garden

Acaena myriophylla (cadillo)
Acaena saccaticupula (goose leaf)
Acantholimon venustum (prickly thrift)
Aethionema glaucinum
Allium carinatum ssp. pulchellum (keeled garlic)
Allium carolinianum
Allium daghestanicum
Allium hyalinum (glassy onion)
Allium platycaule (broad-stemmed onion)
Allium senescens (broadleaf chives)
Anacyclus depressus (Mount Atlas daisy)
Antennaria plantaginifolia (pussytoes; lady's tobacco)
Aquilegia bertolonii (columbine)
Aquilegia discolor (columbine)
Aquilegia shockleyi (desert columbine)
Arabis soyeri (rock cress)
Asphodelus albus (white asphodel)
Aubrieta deltoidea (purple rock cress)
Calandrinia grandiflora (rock purslane)
Callirhoe bushii (Bush's poppy mallow)
Campanula garganica 'Dickson's Gold' (Adriatic bellflower)
Campanula rigidipila
Campanula sarmatica
Chionodoxa luciliae (glory of the snow)
Clarkia tenella (godetia)
Coreopsis verticillata 'Moonbeam' (laceleaf coreopsis)
Cotula hispida
Crocus sativus (saffron crocus)
Crocus speciosus ssp. speciosus (autumn crocus)
Crocus vernus (and hybrids) (spring crocus)
Delosperma cooperi (hardy ice plant)
Dianthus 'Spangled Star' (spangled star pink)
Dianthus amurensis 'Siberian Blues' (Amur pink)
Dianthus armeria (Deptford pink)
Dianthus deltoides (maiden pink)
Dianthus giganteus
Dianthus myrtinervius (Albanian pinks)
Dianthus turkestanicus
Dicranostigma leptopodum (yellow poppy)
Draba athoa
Draba lasiocarpa var. compacta
Dracocephalum argunense (dragonhead)
Dracocephalum botryoides (dragonhead)
Dracocephalum forrestii
Dracocephalum grandiflorum (dragonhead)
Dracocephalum nutans (nodding dragonhead)
Edraianthus parnassicus
Edraianthus tenuifolius (grassy bells)
Ephedra minuta (miniature joint fir)
Ephedra regeliana
Eriogonum crocatum (saffron buckwheat)
Eriogonum sphaerocephalum var. sphaerocephalum (round-headed desert buckwheat)
Eryngium agavifolium (agave-leaved sea holly)
Eryngium alpinum
Eryngium bourgatii (Pyrenees sea holly)
Eryngium venustum
Gentiana occidentalis ssp. aragonensis
Gentiana septemfida (crested gentian)
Gentiana siphonantha (gentian)
Globularia meridionalis (globe daisy)
Globularia repens (matted globe daisy)
Goniolimon collinum 'Sea Spray' (lavender statice)
Gypsophila cerastioides
Helianthemum apenninum (white rock rose)
Helianthemum nummularium (sun rose; rock rose)
Heterotheca pumila (alpine false goldenaster)
Hypericum kiusianum var. yakusimense
Indigofera pseudotinctoria 'Rose Carpet' (prostrate indigo bush)
Iris tectorum (Japanese roof iris)
Leibnitzia anandria (Leibnitz daisy)
Leontopodium palibinianum
Lewisia cotyledon (bitter-root)
Limonium gougetianum (statice)
Limonium minutum
Limonium virgatum ssp. dictyocladum
Linum campanulatum (yellow flax; western flax)
Linum suffruticosum ssp. salsoloides 'Nanum'
Lithodora diffusa 'Grace Ward' (shrubby gromwell)
Montiopsis umbellata
Oenothera perennis (small sundrops)
Orostachys spinosa (dunce caps)
Penstemon confertus (yellow penstemon)
Penstemon euglaucus
Penstemon grandiflorus (large-flowered penstemon)
Penstemon heterophyllus (chaparral penstemon)
Penstemon hirsutus (hairy penstemon)
Penstemon labrosus (scarlet penstemon, scarlet bugler)
Penstemon ophianthus (snake-flowered penstemon)
Penstemon pinifolius (pine-leaf penstemon)
Penstemon procerus (small-flowered penstemon)
Penstemon triflorus (scarlet penstemon; Heller's beardtongue)
Penstemon venustus (shrubby penstemon)
Petrocallis pyrenaica
Petrorhagia saxifraga (tunic flower)
Phemeranthus spinescens (spiny fameflower)
Pulsatilla turczaninovii (Siberian pasqueflower)
Rosularia sempervivum ssp. glaucophylla
Salvia jurisicii
Scilla scilloides (squill)
Scutellaria alpina (alpine skullcap)
Scutellaria orientalis ssp. oreophila (skullcap)
Scutellaria pontica (skullcap)
Scutellaria resinosa (sticky skullcap; prairie skullcap)
Scutellaria sevanensis
Scutellaria suffrutescens (pink skullcap)
Sedum 'Angelina' (stonecrop)
Sedum 'Autumn Joy' (showy stonecrop)
Sedum 'Mentha Requien' (stonecrop)
Sedum 'Stardust' (showy stonecrop)
Sedum aizoon (stonecrop)
Sedum caeruleum (stonecrop)
Sedum ellacombeanum (stonecrop)
Sedum glaucophyllum (cliff stonecrop)
Sedum hispanicum var. minus (Spanish stonecrop)
Sedum kamtschaticum (Kamtschat sedum)
Sedum sexangulare (watch chain stonecrop)
Sedum sieboldii (October daphne)
Sedum tetractinum (stonecrop)
Sempervivum (hens and chicks; houseleek)
Silene armeria (sweet william catchfly; none-so-pretty)
Silene campanulata? (red mountain catchfly)
Silene keiskii?
Silene pusilla
Sisyrinchium macrocarpon
Talinum paniculatum (jewels of Opar)
Thuja occidentalis 'Teddy' (dwarf American arborvitae)
Thymus x citriodorus (variegated lemon thyme)
Ursinia nana
Veronica fruticans (rock speedwell)
Veronica saturejoides
Veronica spicata (spike speedwell)
Veronica spicata 'Red Fox' (pink spike speedwell)

A list of plants we grow in the rock garden annex

Allium cristophii (star of Persia)
Allium tanguticum (lavender globe lily)
Alyssum montanum (creeping basket of gold)
Aquilegia alpina (blue alpine columbine)
Aquilegia pyrenaica (Pyrenees columbine)
Arabis alpina 'Snowcap' (mountain rockcress)
Arabis blepharophylla 'Spring Charm' (rose rock cress)
Artemisia 'Powis Castle'
Athamanta turbith ssp. haynaldii (candy carrot)
Calamagrostis x acutiflora 'Overdam' (feather reed grass)
Campanula carpatica (Carpatian harebell)
Clematis recta var. purpurea (ground clematis)
Colchicum 'Waterlily' and 'Giant' (autumn crocus)
Dasiphora fruticosa (bush cinquefoil)
Dianthus superbus (fringed pink)
Dracocephalum canescens (dragonhead)
Echinacea purpurea (purple coneflower)
Eryngium planum (flat sea holly)
Eryngium variifolium (Moroccan sea holly)
Euphorbia corollata (flowering spurge; poison spurge)
Euphorbia myrsinites (myrtle spurge)
Iris reticulata (reticulata iris)
Lavandula species (lavender)
Leibnitzia anandria (Leibnitz daisy)
Lilium henryi (trumpet lily)
Linum campanulatum (yellow flax; western flax)
Lychnis x arkwrightii 'Vesuvius' (Arkwright's campion)
Nepeta racemosa (catmint)
Oenothera fremontii 'Lemon Silver' (evening primrose)
Opuntia humifusa (eastern prickly-pear)
Penstemon caryi
Penstemon neomexicanus (New Mexico penstemon)
Penstemon venustus (shrubby penstemon)
Penstemon whippleanus (Whipple's penstemon)
Phuopsis stylosa (creeping crosswort)
Salvia nemorosa (meadow sage)
Scutellaria baicalensis (Chinese skullcap)
Sedum 'Matrona' (stonecrop)
Sedum caeruleum (stonecrop)
Sedum kamtschaticum (Kamtschat sedum)
Sedum rupestre (reflexed evergreen stonecrop)
Sedum sieboldii (October daphne)
Sedum spectabile (showy stonecrop)
Sedum spurium 'Dragon's blood' (stonecrop)
Sedum spurium 'Tricolor' (tricolor stonecrop)
Sedum telephium 'Red Cauli' (stonecrop)
Silene zawadskii
Teucrium orientale
Thermopsis chinensis 'Sophia' (dwarf southern lupine, pea bush)
Thlaspi bellidifolium
Thymus pseudolanuginosus (woolly thyme)
Yucca filamentosa (Adam's needle)

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Last modified: February 12, 2011
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