Common Houseleek
Sempervivum tectorum
Sempervivum tectorum, commonly known as Common Houseleek, is a resilient succulent native to Europe. This hardy plant is cherished for its rosette shape and ability to thrive in various conditions, making it a popular choice for gardens and containers.
Everything it needs
9 essentials at a glance
Watering
Sempervivum tectorum prefers to dry out between waterings.
Water thoroughly when the top inch of soil feels dry, typically every 2-3 weeks during the growing season. In winter, reduce watering to once a month. Signs of over-watering include mushy leaves and root rot, while under-watering may cause the leaves to shrivel and become crispy.
Light
This plant thrives in full sun, requiring at least 6 hours of direct sunlight daily.
Ideal placement is in a south-facing window or outdoors in a sunny garden. It can tolerate partial shade but may become leggy and lose its vibrant color in low light conditions.
Soil
Sempervivum tectorum prefers well-draining soil with a pH range of 6.0 to 7.0.
A cactus or succulent potting mix is recommended, or you can create your own by mixing regular potting soil with sand and perlite to enhance drainage.
Humidity
This succulent thrives in low humidity levels, ideally around 30-50%.
To increase humidity, you can mist the plant occasionally or place it on a pebble tray with water. Signs of humidity stress include leaf curling and browning tips.
Temperature
The ideal temperature range for Sempervivum tectorum is 65-75°F (18-24°C) during the day and slightly cooler at night.
It is hardy in zones 3-10, tolerating cold temperatures down to -30°F (-34°C). In summer, it can withstand heat but should be protected from extreme heat.
Fertilizing
Use a balanced, diluted fertilizer with an NPK ratio of 10-10-10 during the growing season, applying every 4-6 weeks.
In fall and winter, refrain from fertilizing as the plant is dormant. Signs of nutrient deficiency include stunted growth and pale leaves.
Pruning
Pruning is generally not necessary, but you can remove dead or damaged leaves at any time to maintain appearance.
Use clean, sharp scissors for cutting. Deadheading is not applicable as this plant does not produce flowers regularly.
Repotting
Repot Sempervivum tectorum every 2-3 years or when it outgrows its pot.
Choose a pot that is 1-2 inches larger in diameter. Signs it needs repotting include roots growing out of the drainage holes or stunted growth. To repot, gently remove the plant from its current pot, shake off excess soil, and place it in fresh soil in the new pot.
Propagation
This plant can be propagated through offsets (pups) or leaf cuttings.
For offsets, gently separate the pups from the mother plant and allow them to dry for a day before planting in well-draining soil. For leaf cuttings, let the cut end dry for a few days, then place it on soil and mist lightly. The best time to propagate is in spring or early summer.
When it's unhappy
Yellow leaves
Why it happens
This can be caused by over-watering or poor drainage.
How to fix it
Ensure the pot has adequate drainage holes and reduce watering frequency.
Leggy growth
Why it happens
Insufficient light can lead to leggy growth.
How to fix it
Move the plant to a brighter location with more direct sunlight.
Root rot
Why it happens
Over-watering and compacted soil can lead to root rot.
How to fix it
Allow the soil to dry out completely and consider repotting in fresh, well-draining soil.
Leaf curling
Why it happens
This can indicate low humidity or under-watering.
How to fix it
Increase watering frequency and consider misting the plant occasionally.
Pests (e.g., aphids)
Why it happens
Pests may infest the plant, especially in warm conditions.
How to fix it
Treat with insecticidal soap or neem oil and ensure good air circulation.
Care through the year
Spring
In spring, resume regular watering and fertilizing as the plant begins to grow actively. Check for offsets to propagate.
Summer
During summer, ensure the plant receives full sun and monitor for signs of heat stress. Water as needed, allowing the soil to dry out.
Fall
In fall, gradually reduce watering as the plant prepares for dormancy. Avoid fertilizing during this time.
Winter
In winter, limit watering to once a month and protect the plant from excessive moisture and cold drafts.
Toxicity & Safety
Sempervivum tectorum is non-toxic to pets and children. It is safe to have around cats and dogs, with no known harmful effects from ingestion.
Good to know
How often should I water my Sempervivum tectorum?
Water your Common Houseleek every 2-3 weeks, allowing the soil to dry out completely between waterings.
What type of soil is best for Sempervivum tectorum?
A well-draining soil mix, such as cactus or succulent potting mix, is ideal for Sempervivum tectorum to prevent root rot.
Can Sempervivum tectorum survive winter outdoors?
Yes, this plant is hardy in zones 3-10 and can survive winter outdoors, but it should be protected from extreme moisture.
Why are my Sempervivum tectorum leaves turning brown?
Brown leaves may indicate over-watering or sunburn. Check your watering schedule and ensure it is not in direct, harsh sunlight.
How do I propagate Sempervivum tectorum?
You can propagate by separating offsets or using leaf cuttings. Allow the cut ends to dry before planting in well-draining soil.
What is the ideal temperature for Sempervivum tectorum?
This plant thrives between 65-75°F (18-24°C) during the day and can tolerate cooler temperatures at night.
Do I need to fertilize Sempervivum tectorum?
Fertilize every 4-6 weeks during the growing season with a balanced fertilizer, but avoid fertilizing in fall and winter.
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