Getting it to bloom

Why won't my Stinking Trillium bloom? (and how to make it flower)

Also called Stinking Trillium, Fetid Trillium (Trillium foetidissimum).

More about stinking trillium

About Stinking Trillium

Trillium foetidissimum · also called Stinking Trillium, Fetid Trillium · flowering

Trillium foetidissimum is a distinctive sessile-flowered woodland perennial with a highly restricted native range along river floodplains in southern Mississippi and Louisiana, USA. It produces stalkless, erect dark maroon petals above a whorl of large, handsomely silver-mottled leaves in late winter to early spring, and is notable for a strong, unpleasant carrion-like scent that attracts fly pollinators. It demands reliably moist, humus-rich soil in deep shade and is less cold-hardy than most North American Trilliums, suiting gardens in USDA zones 6–9. Classified as mildly toxic — all parts, especially roots and berries, can cause gastrointestinal upset in pets and humans.

Plant type: flowering

The reasons stinking trillium isn't blooming

Almost every non-blooming stinking trillium 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 stinking trillium 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 stinking trillium to flower

Maximise sun. Give stinking trillium 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 stinking trillium and get the feeding right with the stinking trillium 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

Stinking Trillium 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 stinking trillium care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Stinking Trillium blooming — frequently asked questions

Why won't my stinking trillium flower?

Stinking Trillium 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 stinking trillium bloom?

Give stinking trillium 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 stinking trillium normally bloom?