Searching...
Plant Search
Search for any plant to learn how to grow it.
Rock Cress
Arabis alpina
flowerRock cress is a low-growing alpine perennial that forms dense mats of foliage topped with delicate clusters of small white, pink, or purple flowers in spring. This hardy groundcover thrives in rocky, well-drained settings and is prized for rock gardens, alpine troughs, and border edging. It is extremely cold-hardy and requires minimal maintenance once established.
Looking for a specific variety?
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9, with exceptional hardiness in cooler regions
Sign up to see your zone highlighted.
Growth Stages
Seedling
3-4 weeksTiny cotyledons emerge, developing into small rosettes of narrow, linear foliage
Keep soil lightly moist but not waterlogged. Provide good drainage and air circulation. Thin seedlings to proper spacing.
Vegetative/Establishment
4-8 weeks (first year)Plant develops dense, low-growing mats of fine, narrow green leaves forming tight rosettes
Water moderately during the growing season. Avoid overhead watering. Allow soil to dry slightly between waterings. Ensure excellent drainage.
Pre-flowering/Winter Dormancy
3-4 monthsPlant remains semi-evergreen or dormant over winter, with buds forming at leaf axils in late winter
Reduce watering significantly. Provide excellent drainage to prevent rot. No fertilizer needed. May require protection in extremely harsh climates.
Flowering
3-6 weeksDense clusters of small four-petaled flowers in white, pink, or purple bloom on short stems above the foliage mat in early to mid-spring
Minimal intervention needed. Deadhead spent flowers to encourage longer bloom and prevent excessive self-seeding. Water only if drought is severe.
Post-flowering/Self-seeding
2-4 weeksFlowers fade and form small seed pods; plant may produce copious seed if not deadheaded
Deadhead to maintain neat appearance and prevent aggressive self-seeding. Allow some flowers to remain if you wish to collect seed or encourage voluntary spread.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Remove by hand, use row covers on young plants, apply neem oil if severe; rarely causes serious damage to established plants
-
Improve air circulation, avoid overhead watering, remove affected leaves, apply copper fungicide if necessary
-
Ensure excellent drainage, reduce watering in humid climates, plant in raised beds or containers if native soil is heavy
-
and
Remove manually, use beer traps, apply diatomaceous earth around plants, encourage beneficial predators
Uses
Cut flowers for spring arrangements
CraftThe delicate flowers are excellent additions to early spring bouquets and floral designs. Cut stems in early morning when flowers are fully open for best longevity in the vase. [source]
Alpine rock garden accent
HouseholdRock cress is a classic choice for rock gardens, alpine troughs, scree gardens, and between paving stones. Its low profile and spring blooms make it a foundational plant for alpine gardening. [source]
Early season pollinator food
WildlifeThe abundant spring flowers provide critical early nectar and pollen for emerging bees, butterflies, and other pollinators during the lean early-season months. [source]
Border and edging plant
HouseholdUse rock cress along garden borders, pathway edges, or as a low-growing groundcover to add structure and spring color while keeping a neat, compact form. [source]
Harvest Tips
Rock cress is grown as an ornamental flower, not harvested for food. Cut flower stems for arrangements in spring when blooms are fully open. For seed collection, allow some flowers to mature, then collect dry seed pods in late spring and store in a cool, dry place.
Fun Facts
- 🌱 Rock cress is so cold-hardy that it is one of the first alpine plants to flower in spring, often blooming while snow is still present in sheltered areas.
- 🌱 The genus Arabis includes the model organism Arabidopsis thaliana, which was the first plant to have its entire genome sequenced and revolutionized plant molecular biology.
- 🌱 Some variegated cultivars like 'Variegata' feature cream and green striped leaves that add interest even when the plant is not in flower.
Want to save this plant and get personalized recommendations?
Sign up to add plants to your list, see your growing zone highlighted, and get planting timelines based on your frost dates.