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Rock Garden Perennial Plants

April 19, 2000

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This plant requires full sun for most of the dayRequires full sun for most of the day This plant requires shade for at least 3 hours during the hottest part of the dayRequires shade for at least 3 hours during the hottest part of the day This plant prefers little or no direct sunlightLittle or no direct sunlight Some or all parts of this plant <I>may</I> be toxicSome or all parts of this plant may be toxic
Once established, these plants require little or no supplemental wateringOnce established, these plants require little or no supplemental watering These plants will tolerate some drought, but benefit from periodic wateringThese plants will tolerate some drought, but benefit from periodic watering These plants needs regular weekly watering, more often in extreme heatNeeds regular weekly watering, more often in extreme heat These plants needs regular weekly watering, more often in extreme heatKeep constantly moist
Common
name		 Botanical
name		 Height Characteristics USDA
Zone		 Light Water
Sheep bur Acaena buchanii 1"-4" Dense mat of evergreen, coppery-purple foliage spreads rapidly 7-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Dwarf Yarrow Achillea kellereri 8" White flowers and silvery foliage 5-10
This plant requires full sun for most of the day
Once established, these plants require little or no supplemental wateringThese plants will tolerate some drought, but benefit from periodic watering
Pinwheel Aeonium haworthii 18" Medium sized succulent that form rosettes of waxy blue-grey rosettes tinged in red 9-11
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic watering
Stonecress Aethionema 'Warley Rose' 6" Low growing shrubby evergreen, with long lasting bright rose-pink flowers 6-9
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic watering
Carpet Bugle Ajuga genevensis 4"-6" Typical Ajuga with flowers which vary from dull red to white and blue. 3-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Rock Jasmine Androsace sarmentosa 4" Small green leaves with silver hairs; pink flowers from April to June 3-8
This plant requires full sun for most of the day
These plants needs regular weekly watering, more often in extreme heat
Windflower
Some or all parts of this plant <I>may</I> be toxic		 Anemone pulsatilla 9"-12" Fernlike foliage follows the pretty blue flowers in May 4-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Catsfoot Antennaria dioica 2"-6" Mat of durable silvery leaves; light to bright pink flowers 5-9
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic wateringThese plants needs regular weekly watering, more often in extreme heat
Alpine Columbine
Some or all parts of this plant <I>may</I> be toxic		 Aquilegia flabellata 12"-18" White and violet flowers are borne on six-inch stalks above bluish-green leaves 3-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Rockcress Arabis sturii 4"-6" Easy plant to grow; leaves are usually jagged and hairy; flowers white to red 4-9
This plant requires full sun for most of the day
These plants needs regular weekly watering, more often in extreme heat
Sandwort Arenaria montana 6" Mossy looking mat of foliage with small 1" white flowers 4-9
needs vary
needs vary
Sea Pink Armeria maritima 4"-8" Forms mound of dark green leaves; dense cover of white to pink flowers in spring to summer 4-9
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic wateringThese plants needs regular weekly watering, more often in extreme heat
Alpine Aster Aster alpinus 6"-12" Compact mound with 1 1/2 inch flowers in May/June 3-9
This plant requires full sun for most of the day
These plants needs regular weekly watering, more often in extreme heat
Aubretia Aubretia deltoidea 2"-6" Vigorous, colorful, and tolerant of a wide range of conditions. Long blooming cover of pink flowers in early Spring. 4-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Basket of Gold Aurinia saxatilis 8"-12" Dense clusters of gold flowers in Spring and early Summer. All
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Creeping Bellflower Campanula alpestris 2"-5" Blue or white bell shaped flowers through early Summer. 5-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Snow in the Summer Cerastium tomentosum 4" Invasive plant... loose clusters of white, one inch flowers; narrow, woolly oblong leaves 3-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic wateringThese plants needs regular weekly watering, more often in extreme heat
Ice Plant Delosperma cooperi 5" Shrubby succulent; bright Daisy-like magenta flowers in mid to late Summer 9-11
This plant requires full sun for most of the day
Once established, these plants require little or no supplemental wateringThese plants will tolerate some drought, but benefit from periodic watering
Alpine Pinks Dianthus alpinus 4"-8" Cushions of neat, dark green foliage; typical "Pink" flowers in mid Summer 4-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Shooting Star Dodecatheon meadia 6"-18" Primrose-like rosette plant with unique flowers in shades from white to purple. Prefers light shade. 3-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Whitlow grass Draba aizoides 4" Small rosette of tiny grey or greel leaves; bright yellow flowers in late Spring 5-9
This plant requires full sun for most of the day
These plants needs regular weekly watering, more often in extreme heat
Mountain Avens Dryas drummondii 4" Mat of dark green, Oak-like leaves; 1 1/2 inch white flowers in early Summer 2-9
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic watering
Hens and Chicks Echeveria elegans 2"-3" Succulent blue-green clustering rosettes; bell shaped pink flowers in late summer 8-11
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic watering
Fleabane Erigeron glaucus 6"-10" Clump forming, small spoon shaped leaves; Daisy-like pink flowers 3-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic wateringThese plants needs regular weekly watering, more often in extreme heat
Sulfer Flower Eriogonum umbellatum 9"12" Low growing, spreading mat of 1" green leaves; clusters of bright yellow flowers 6-9
This plant requires full sun for most of the day
Once established, these plants require little or no supplemental wateringThese plants will tolerate some drought, but benefit from periodic watering
Cranesbill Erodium reichardii 3"-6" Delicate looking but durable tufts of dense green foliage; small pink flowers throughout the Summer 7-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Spurge
Some or all parts of this plant <I>may</I> be toxic		 Euphorbia myrsinites 6"-8" Stiff, blue-green leaves spiral outward around woody stems; golden clusters of flowers in early Spring 5-10
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic watering
Trumpet Gentian Gentiana acaulis 2"-4" Mat of glossy 1 inch green leaves; disproportionate 3 inch, blue trumpet flowers in early Summer 3-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Dwarf Baby's Breath Gypsophila cerastioides 3" Spreading mat of greyish foliage; abundant clusters of pink or white flowers from late Spring til early Summer 5-10
This plant requires full sun for most of the day
These plants needs regular weekly watering, more often in extreme heat
Green Carpet Herniaria glabra 2"-3" Tiny, bright green, trailing foliage, turning reddish in the Fall; flowers are insignificant All
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
This plant prefers little or no direct sunlight
These plants needs regular weekly watering, more often in extreme heat
Coral Bells Heuchera sanguinea 12"-18" Glossy, 3 inch, deeply lobed green to purple leaves; clusters of scarlet flowers on a stout 15" red stems in early-mid Spring 6-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic wateringThese plants needs regular weekly watering, more often in extreme heat
Evergreen Candytuft Iberis sempervivens 8"-12" Spreading, narrow green leaves on shrubby stems; dense cover of small white flowers in early-late Spring 4-11
This plant requires full sun for most of the day
These plants needs regular weekly watering, more often in extreme heat
Lewisia Lewisia tweedyi 8"-12" Rosettes of fleshy 4" evergreen leaves; satiny peach-pink flowers from Spring to Summer; requires perfect drainage 5-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic watering
Lithodora Lithodora diffusa 4"-12" Evergreen mini-shrub; bright blue, star shaped flowers in early Spring 7-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic watering
Oregano Origanum amanum 6"-8" Evergreen, small heart shaped green leaves; funnel shaped pink flowers mid-summer 8-10
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic watering
Alpine Poppy
Some or all parts of this plant <I>may</I> be toxic		 Papaver alpinum 8" Short-lived, miniature of the Iceland Poppy; white or yellow flowers in mid summer 5-10
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic wateringThese plants needs regular weekly watering, more often in extreme heat
Penstemon Penstemon pinifolius 6" Dark orange flowers, needle-like foliage; blooms June to September 8-11
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic watering
Phlox Phlox subulata 4"-6" Mat growing fine foliage with masses of 1 inch, fragrant, star shaped flowers (white, blue, pink or red) in Spring 3-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Rockery Orchid Pleione bulbocodioides 3" Produces a single 3 inch orchid flower in early Spring, followed by a single 6 inch leaf; tough to grow, but very rewarding 8-10
This plant prefers little or no direct sunlight
These plants needs regular weekly watering, more often in extreme heat
Northern Jacobs Ladder Polemonium boreale 6"-12" Clumping plant with "ladder like" leaf stems, with dozens of 1/2 inch blue to purple flowers in spring 3-9
This plant requires shade for at least 3 hours during the hottest part of the day
This plant prefers little or no direct sunlight
These plants needs regular weekly watering, more often in extreme heat
Primrose Primula 6"-12" Hundreds of species and varieties suitable for the rock garden; dwarf varieties are best for rock gardens vary
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
This plant prefers little or no direct sunlight
These plants needs regular weekly watering, more often in extreme heat
Pasque Flower Pulsatilla vulgaris 8"-10" 3 inch, pale purple flowers are followed by ferny foliage and then by attractive silky seed heads 5-9
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic watering
Soapwort Saponaria ocymoides 4" Forms thick mat of ground covering, fine foliage; hundreds of small pink to red flowers cover the plant in early Spring 4-10
This plant requires full sun for most of the day
These plants will tolerate some drought, but benefit from periodic watering
Saxifrage Saxifraga bronchialis 8" Forms a cushion of moss-like, fine foliage; cream colored flowers, spotted with red or pink in late Spring 4-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic watering
Stonecrop Sedum acre 1 1/2"-2" Creeping, small bright green leaves covered with small, star shaped, golden flowers in Spring 5-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
Once established, these plants require little or no supplemental wateringThese plants will tolerate some drought, but benefit from periodic watering
Hens and Chicks Sempervivum 1"-4" Many varieties of succulent rosettes; unique flowers develop after the plant is a couple years old; needs excellent drainage zones vary
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
This plant prefers little or no direct sunlight
These plants will tolerate some drought, but benefit from periodic watering
Cushion Pink Silene acaulis 2"-4" Soft, hairy leaves spread slowly to form a low mat. Tubular pink flowers appear in late summer or early Fall 2-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants needs regular weekly watering, more often in extreme heat
Blue Eyed Grass Sisyrinchium brachypus 4"-6" Clumps of Iris like leaves; bright blue, star-shaped flowers June to September 5-10
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic wateringThese plants needs regular weekly watering, more often in extreme heat
Snowbell Soldanella alpina 6" Clump forming, rounded leathery leaves; pale purple, fringed bells appear in early Spring 5-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic watering
Woolley Thyme Thymus pseudolanuginosus 1" Spreading mat of tiny, hairy, light green foliage; covered by tiny pink flowers in mid Summer. Several aromatic Thymes are also available. 3-9
This plant requires full sun for most of the dayThis plant requires shade for at least 3 hours during the hottest part of the day
These plants will tolerate some drought, but benefit from periodic watering
Speedwell Veronica prostrata 8"-12" Forms mat of woody stems and saw-toothed leaves; spikes of small blue flowers in early Summer 5-9
This plant requires full sun for most of the day
These plants needs regular weekly watering, more often in extreme heat

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