Getting it to bloom

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

Also called Crosswort, Smooth Bedstraw (Cruciata laevipes).

More about crosswort

About Crosswort

Cruciata laevipes · also called Crosswort, Smooth Bedstraw · flowering

Crosswort (Cruciata laevipes, syn. Galium cruciata) is a low-growing native perennial of the Rubiaceae family, widespread across the UK in woodland edges, hedgerows, and calcareous grassland. Its whorls of four hairy, cross-shaped leaves give the plant its name, and tiny pale yellow honey-scented flowers appear from April to June. The most important care point is that it needs moderately fertile, well-drained, neutral to calcareous soil and will spread by rhizomes to form loose ground-covering mats. No records of toxicity to cats or dogs exist; it is considered of low concern but not formally listed as pet-safe by ASPCA.

Plant type: flowering

The reasons crosswort isn't blooming

Almost every non-blooming crosswort 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 crosswort 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 crosswort to flower

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

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

Crosswort blooming — frequently asked questions

Why won't my crosswort flower?

Crosswort 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 crosswort bloom?

Give crosswort 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 crosswort normally bloom?