Getting it to bloom

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

Also called Cuckooflower, Lady's Smock, Milkmaids, Cardamine (Cardamine pratensis).

More about cuckooflower

About Cuckooflower

Cardamine pratensis · also called Cuckooflower, Lady's Smock · flowering

Cardamine pratensis is a graceful, clump-forming perennial native to moist meadows, riverbanks, and damp woodland throughout the UK, Europe, and North America, producing loose racemes of pale lilac-pink to white four-petalled flowers in April to June at the same time the cuckoo calls — giving it its best-known common name. It is a vital early-season nectar source and the sole larval foodplant of the Orange-tip butterfly. The most important care requirement is consistent moisture: even brief drought causes wilting and reduced flowering. No ASPCA data is available for this species; Cardamine/Brassicaceae glucosinolates can cause mild gastrointestinal irritation in pets.

Plant type: flowering

Watch for — Aphids: Colonies of aphids, particularly the cabbage aphid, can colonise stems and flower buds in spring; knock off with a strong water jet or introduce ladybird larvae as biocontrol.

The reasons cuckooflower isn't blooming

Almost every non-blooming cuckooflower 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 cuckooflower 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 cuckooflower to flower

Maximise sun. Give cuckooflower 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 cuckooflower and get the feeding right with the cuckooflower 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

Cuckooflower 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 cuckooflower care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Cuckooflower blooming — frequently asked questions

Why won't my cuckooflower flower?

Cuckooflower 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 cuckooflower bloom?

Give cuckooflower 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 cuckooflower normally bloom?