Getting it to bloom

Why won't my Fringed Houseleek bloom? (and how to make it flower)

Also called Fringed Houseleek, Ciliated Houseleek, Teneriffe Houseleek (Sempervivum ciliosum).

More about fringed houseleek

About Fringed Houseleek

Sempervivum ciliosum · also called Fringed Houseleek, Ciliated Houseleek · flowering

Sempervivum ciliosum is a Bulgarian alpine succulent forming compact mats of small, grey-green rosettes densely covered in fine white hairs that give the foliage a frosted, fringed appearance. Native to rocky limestone slopes in Bulgaria and the Balkans, it thrives in full sun with sharply drained gritty soil and is extremely cold-hardy. The key care rule is never allow water to pool in or around the rosettes, especially in winter. Sempervivum is listed as non-toxic to cats and dogs by the ASPCA.

Plant type: flowering

The reasons fringed houseleek isn't blooming

Almost every non-blooming fringed houseleek traces back to one of these, roughly in order of how common they are:

Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.
Too much nitrogen feed, driving lush foliage at the expense of flowers (very common with general or lawn feeds).
The plant has not been deadheaded, so it stops flowering once it sets seed.
Irregular watering — drought or waterlogging at the budding stage makes buds abort.
It is still too young or was checked by a transplant and is rebuilding before flowering.

Feeding fringed houseleek a high-nitrogen general feed and growing it in too little sun — you get a big leafy plant and almost no flowers.

The fix — how to get fringed houseleek to flower

Maximise sun. Give fringed houseleek the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers.
Switch the feed. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.
Deadhead regularly. Remove spent flowers often to keep it producing more rather than stopping to set seed.
Water consistently. Keep moisture even through budding and flowering — drought-then-flood swings make buds drop.

Light and feeding do most of the heavy lifting here. Dial in the spot with the light guide for fringed houseleek and get the feeding right with the fringed houseleek fertilising schedule — the wrong feed (too much nitrogen) is one of the most common silent reasons a healthy plant makes leaves instead of flowers.

Bloom season and what to expect

Fringed Houseleek flowers across its growing season (mostly summer) and, kept fed and deadheaded, can bloom for many weeks or right up to frost.

Post-bloom care so it flowers again

Deadhead, keep feeding lightly, and many will rebloom; collect seed from the best plants at the end of the season if you want to grow them again.

For everything else this plant needs day to day, see the full fringed houseleek care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Fringed Houseleek blooming — frequently asked questions

Why won't my fringed houseleek flower?

Fringed Houseleek blooms on the season's growth given enough sun, warmth and the right feed — there is no cold or photoperiod trick, just good growing conditions and a bloom-leaning feed. The most common reason it is not happening: Too little sun — most of these need full sun (or very bright light) to flower well; shade gives leaves, not blooms.

How do I make fringed houseleek bloom?

Give fringed houseleek the sunniest spot you have — for most bedding and fruiting plants, more direct light directly means more flowers. Move off high-nitrogen feeds and use a higher-potassium "bloom" or tomato-type feed as it comes into flower.

When does fringed houseleek normally bloom?