Getting it to bloom

Why won't my Siskiyou Lewisia bloom? (and how to make it flower)

Also called Siskiyou Lewisia, Cliff Maids, Broadleaf Lewisia (Lewisia cotyledon).

More about siskiyou lewisia

About Siskiyou Lewisia

Lewisia cotyledon · also called Siskiyou Lewisia, Cliff Maids · flowering

Native to rocky cliffs and outcrops in the Siskiyou and Klamath mountains of northern California and southern Oregon, Lewisia cotyledon is an evergreen rosette perennial prized for its spectacular sprays of funnel-shaped flowers in shades from white and pale pink through to vivid orange, yellow, and magenta. It demands sharply drained, humus-rich, acidic to neutral gritty soil and resents winter wet around its crown above all else; planting on its side in a wall crevice or in a raised alpine trough dramatically improves survival. It holds the RHS Award of Garden Merit. Lewisia is not documented by the ASPCA as toxic; it is considered mildly-toxic as a precaution since definitive non-toxic listing is absent.

Plant type: flowering

The reasons siskiyou lewisia isn't blooming

Almost every non-blooming siskiyou lewisia 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 siskiyou lewisia 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 siskiyou lewisia to flower

Maximise sun. Give siskiyou lewisia 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 siskiyou lewisia and get the feeding right with the siskiyou lewisia 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

Siskiyou Lewisia 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 siskiyou lewisia care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Siskiyou Lewisia blooming — frequently asked questions

Why won't my siskiyou lewisia flower?

Siskiyou Lewisia 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 siskiyou lewisia bloom?

Give siskiyou lewisia 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 siskiyou lewisia normally bloom?