Getting it to bloom

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

Also called Fringed Cobra Lily, Chinese Cobra Lily (Arisaema ciliatum).

More about fringed cobra lily

About Fringed Cobra Lily

Arisaema ciliatum · also called Fringed Cobra Lily, Chinese Cobra Lily · flowering

Fringed Cobra Lily is a striking Chinese aroid from Sichuan and Yunnan, producing elegant umbrella-like compound leaves on a mottled pseudostem and a purple-brown spathe adorned with fine hairy fringes at its margins. Hardy to USDA zone 5, it naturalises well in sheltered woodland gardens in good well-draining shade. Unusual and highly ornamental.

Plant type: flowering

Watch for — Failure to reflower: Corms that were inadequately fed or suffered drought during the growing season may revert to leaf-only growth the following year. Ensure a full season of moisture, nutrients, and dappled shade to build sufficient corm reserves.

The reasons fringed cobra lily isn't blooming

Almost every non-blooming fringed cobra lily 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 cobra lily 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 cobra lily to flower

Maximise sun. Give fringed cobra lily 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 cobra lily and get the feeding right with the fringed cobra lily 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 Cobra Lily 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 cobra lily care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Fringed Cobra Lily blooming — frequently asked questions

Why won't my fringed cobra lily flower?

Fringed Cobra Lily 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 cobra lily bloom?

Give fringed cobra lily 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 cobra lily normally bloom?