How to Grow Houseleek
Wikimedia Commons
Houseleek
Sempervivum tectorum
flowerSempervivum tectorum is a hardy succulent perennial forming dense rosettes of fleshy leaves in shades of green, red, and purple. It produces tall flower stalks with star-shaped pink or red blooms in summer. This extremely cold-hardy plant is perfect for rock gardens, containers, and green roofs.
Looking for a specific variety?
When should you plant Houseleek in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Houseleek timeline · Pittsburgh, PA (Zone 6b)
-
Plant Houseleek
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
First Houseleek blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Houseleek dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; most vigorous in zones 3-8
Sign up free to see if Houseleek grows in your zone — and get a personalized planting timeline.
Get my Houseleek timeline →Growth Stages
Establishment
First 6-8 weeksYoung rosettes are small with tightly packed leaves forming tight geometric patterns
Plant in well-draining soil mix. Water lightly after planting. Protect from excessive moisture and winter wet. Avoid overwatering.
Vegetative Growth
Several months to 2+ yearsRosettes expand and mature, developing vibrant color as temperatures cool; may produce offsets (chicks)
Maintain dry conditions, especially in winter. Allow rosettes to grow without disturbance. Remove dead leaves as needed. Offsets can be separated and replanted.
Pre-flowering
2-4 weeksMature rosette (typically 3+ years old) develops a central flower bud in late spring
The flowering rosette is monocarpic (dies after flowering). Allow the flower stalk to develop naturally. Continue minimal watering.
Flowering
4-6 weeksTall flower stalk (12-18 inches) emerges with clusters of small star-shaped pink, red, or yellow blooms
The parent rosette exhausts reserves during flowering. Ensure well-draining soil to prevent rot. Flowers attract bees and butterflies. Allow flowers to open fully.
Seed Production & Decline
Ongoing; colony perpetuates via offsetsAfter flowering, the parent rosette withers and dies, but numerous offsets (chicks) surround the base
Allow seeds to mature for self-seeding. Offsets can be detached and replanted to rejuvenate the colony. Remove the dead rosette once completely dried.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Remove infested rosettes; improve air circulation; spray with insecticidal soap if severe. Isolate affected plants.
-
Prevent by ensuring excellent drainage and reducing winter moisture. Remove affected plants. Do not overwater. Use well-draining soil medium.
-
Increase humidity slightly; spray with water to dislodge. Use miticide if infestation is severe. Rare in outdoor plants.
-
Improve air circulation. Remove affected leaves. Ensure soil drains well and leaves dry quickly after rain. Fungicide rarely needed.
Uses
Living roof & green building
CraftSempervivum tectorum is the traditional choice for living roofs and walls due to extreme hardiness and low maintenance. Its shallow roots and drought tolerance make it ideal for extensive green roof systems. [source]
Container & rock garden display
HouseholdThe geometric rosettes and color variations make Sempervivum an attractive ornamental for containers, alpine troughs, and rock gardens. Multiple rosettes create striking sculptural compositions. [source]
Traditional herbal remedy
MedicinalHistorically used in folk medicine for wounds, burns, and skin conditions due to its mucilaginous properties. The juice was applied topically to treat warts and calluses. [source]
Pollinator support
WildlifeThe star-shaped summer flowers attract bees, butterflies, and other beneficial insects, providing a nectar source when blooming. [source]
Low-maintenance landscaping
HouseholdRequires minimal water, fertilizer, and pruning once established, making it ideal for xeriscaping and sustainable landscape design in cold climates. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Sempervivum is ornamental and not harvested for food. Collect offsets in spring or early summer when 1-2 inches in diameter by gently separating from parent plant. Allow offset base to dry 1-2 days before replanting. Collect seed heads after flowering; allow to dry completely, then scatter seeds on sandy soil.
Fun Facts
- 🌱 Sempervivum means 'always living' in Latin, referring to the plant's persistence and hardiness; it has been cultivated on roofs and walls for centuries across Europe.
- 🌱 Sempervivum tectorum is monocarpic, meaning individual rosettes flower only once in their lifetime before dying, but the colony perpetuates endlessly through offset production.
- 🌱 The plant stores water in its fleshy leaves and can survive extended droughts of several months; its leaves can shrivel dramatically under stress but fully plump up again when watered.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Houseleek planting timeline
Tell us your zip code and we'll calculate exactly when to start Houseleek seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Houseleek timeline →