Getting it to bloom

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

Also called Formosa toad lily, autumn toad lily (Tricyrtis formosana).

More about formosanum toad lily

About Formosanum Toad Lily

Tricyrtis formosana · also called Formosa toad lily, autumn toad lily · flowering

Tricyrtis formosana is a shade-loving woodland perennial from Taiwan grown for its exotic late-summer-to-autumn flowers — small upright stars speckled in purple, mauve and white that resemble tiny orchids. Arching leafy stems spread gently by stolons to form colonies. It blooms when most of the shade garden has finished, lighting up dim corners.

Plant type: flowering

Watch for — Leaf-tip browning from drought: The most common complaint: crispy, browned leaf edges and tips signal dry soil or too much sun. Keep soil evenly moist and move to deeper shade to keep foliage clean through to flowering.

The reasons formosanum toad lily isn't blooming

Almost every non-blooming formosanum toad 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 formosanum toad 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 formosanum toad lily to flower

Maximise sun. Give formosanum toad 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 formosanum toad lily and get the feeding right with the formosanum toad 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

Formosanum Toad 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 formosanum toad lily care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Formosanum Toad Lily blooming — frequently asked questions

Why won't my formosanum toad lily flower?

Formosanum Toad 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 formosanum toad lily bloom?

Give formosanum toad 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 formosanum toad lily normally bloom?