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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'm not 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 do find that a rock garden is the best way to showcase small perennials, especially those that require excellent drainage. For that purpose, our rock garden is 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. It is separated from the driveway by a nice full specimen of shrubby golden St John's wort (hypericum frondosum 'Sunburst'). Other highlights are Lebanon stonecress (aethionema cordifolia), lewisia, draba aizoides, and various species tulips and autumn-flowering crocus.

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

Aethionema cordifolium (Lebanon stonecress)
Alchemilla alpina (alpine lady's mantle)
Allium kermesinum (crimson leek; kamnik leek)
Allium senescens (broadleaf chives)
Arabis androsacea (rock cress)
Artemisia 'Powis Castle'
Aubrieta deltoidea (purple rock cress)
Bukiniczia cabulica
Campanula carpatica (Carpatian harebell)
Campanula garganica 'Dickson's Gold' (Adriatic bellflower)
Campanula rigidipila
Chionodoxa luciliae (glory of the snow)
Coreopsis auriculata 'Zamphir' (ear-leaved tickseed)
Coreopsis verticillata 'Moonbeam' (laceleaf coreopsis)
Cotula hispida
Crocus sativus (saffron crocus)
Crocus speciosus ssp. speciosus (autumn crocus)
Crocus vernus (and hybrids) (spring crocus)
Delosperma congestum (ice plant)
Dianthus arenarius (sand pink)
Dianthus armeria (Deptford pink)
Dianthus deltoides (maiden pink)
Dicranostigma leptopodum (yellow poppy)
Draba arabisans (rock whitlow-grass)
Draba dubia (whitlow-grass)
Edraianthus tenuifolius
Ephedra minuta (miniature joint fir)
Ephedra regeliana
Euphorbia cyparissoides 'Fens Ruby' (cypress spurge)
Gentiana septemfida (crested gentian)
Globularia meridionalis (globe daisy)
Globularia repens
Gypsophila cerastioides
Helianthemum nummularium (sun rose; rock rose)
Hypericum frondosum 'Sunburst' (golden St John's wort)
Leibnitzia anandria (Leibnitz daisy)
Leucojum autumnale (autumn snowflake)
Lewisia cotyledon (bitter-root)
Lithodora diffusa 'Grace Ward' (shrubby gromwell)
Lychnis viscaria (catchfly)
Opuntia compressa (eastern prickly-pear)
Papaver rupifragum (Spanish poppy)
Penstemon palmeri (Palmer penstemon)
Penstemon pinifolius (pine-leaf penstemon)
Penstemon triflorus (scarlet penstemon; Heller's beardtongue)
Penstemon whippleanus (Whipple's penstemon)
Petrorhagia saxifraga (tunic flower)
Saponaria ocymoides (rock soapwort)
Scilla autumnalis (autumn squill)
Scutellaria alpina (alpine skullcap)
Sedum 'Autumn Joy' (showy stonecrop)
Sedum 'Stardust' (showy stonecrop)
Sedum aizoon (stonecrop)
Sedum kamtschaticum (Kamtschat sedum)
Sedum rupestre (reflexed evergreen stonecrop)
Sedum sieboldii (October daphne)
Sedum tetractinum (stonecrop)
Sempervivum (hens and chicks; houseleek)
Silene campanulata? (red mountain catchfly)
Silene keiskii?
Thymus x citriodorus (variegated lemon thyme)
Veronica spicata 'Red Fox' (pink spike speedwell)
Wulfenia carinthiaca (cow's footprint)

A list of plants we grow in the rock garden annex

Allium cristophii (star of Persia)
Arabis alpina 'Snowcap' (mountain rockcress)
Armeria maritima (sea thrift)
Aubrieta deltoidea (purple rock cress)
Calamagrostis x acutiflora 'Overdam' (feather reed grass)
Colchicum 'Waterlily' and 'Giant' (autumn crocus)
Dasiphora fruticosa 'Pink Beauty' (bush cinquefoil)
Echinacea purpurea (purple coneflower)
Eryngium planum (flat sea holly)
Euphorbia corollata (flowering spurge; poison spurge)
Euphorbia myrsinites (myrtle spurge)
Geranium dalmaticum (Dalmatian cranesbill)
Iris reticulata (reticulata iris)
Lavandula species (lavender)
Nepeta mussinii (catmint)
Oenothera fremontii 'Lemon Silver' (evening primrose)
Orostachys iwarenge (dunce caps)
Rhodohypoxis baurii (red star)
Sedum 'Matrona' (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)
Thymus pseudolanuginosus (woolly thyme)
Yucca filamentosa (Adam's needle)

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Last modified: April 06, 2008
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