cactus succulent

Lime Houseleek

The Story

Plant Bio

Sempervivum calcareum is a low-growing, mat-forming evergreen succulent that multiplies via short stolons to produce tight, geometric rosettes. The fleshy, glaucous blue-green leaves feature a protective powdery farina coating and distinctive deep reddish-purple tips.

This species is distinguished by its highly symmetrical, calcareous-loving rosettes that spread into dense colonies over time. In late spring to summer, mature rosettes produce erect, leafy, conical clusters of pale pink to greenish-pink star-shaped flowers.

Uses & Benefits:

Produces tight, highly geometric blue-green rosettes with deep purple tips, forming dense, evergreen groundcover mats.

Extremely drought-tolerant and cold-hardy, making it ideal for low-water landscaping and rock crevices.

Attracts generalist pollinators, including native bees and butterflies, to its pollen-rich summer flowers.

Essentials

At a Glance

Plant Type

Cactus Succulent

Height

Width

20"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Low

Humidity

Low

Lifespan

Perennial

Native To

Europe

Toxicity

Non-toxic

Bloom period

Late spring – Summer

In flower about 4 months of the year

Planting

How to Grow

Plant in gritty, sandy, or rocky limestone-rich soil with exceptional drainage to prevent winter wetness.
Position in a location that receives full sun, though light afternoon shade is beneficial in intensely hot desert-like regions.
Water sparingly, allowing the soil to dry out completely between waterings, and avoid standing water.
Separate and replant the small vegetative offsets that form on short stolons around the base of the parent rosette during spring or summer.

Pro Tip

Keep this alpine succulent strictly outdoors in full sun; growing it indoors or in low light causes the rosettes to lose their compact geometric form and intense purple tip coloration.

Keep It Thriving

Care Guide

Do

Provide excellent drainage and gritty soil to protect the root system from rot.
Remove spent, dead flowering mother rosettes down at the base after summer blooming.
Expose the plant to cold winter temperatures to satisfy its natural dormancy requirement.
Apply a light, low-nitrogen slow-release fertilizer once in spring if grown in containers.

Don't

Do not grow this plant indoors on low-light windowsills.
Do not prune into old bare wood, as the rosettes will not resprout from bare stems.
Do not overwater or allow the plant to sit in standing water, especially during winter.
Do not overfeed, as excessive nutrients degrade the compact growth habit.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Pest Check
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Rock gardensGreen roofsContainer displaysCrevice gardensGroundcover mats

Multiply

Propagation Methods

Good to Know

Common Questions

Lime Houseleek questions

What zones can Lime Houseleek grow in?

Lime Houseleek is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Lime Houseleek deer resistant?

Not reliably. Deer may browse Lime Houseleek, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Lime Houseleek bloom?

Lime Houseleek typically blooms in late spring through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Lime Houseleek need full sun?

Lime Houseleek does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Lime Houseleek drought tolerant?

Yes — once established (usually after the first full season), Lime Houseleek handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.