Getting it to bloom

Why won't my Cross-leaved heath bloom? (and how to make it flower)

Also called Cross-leaved heath, Bog heather (Erica tetralix).

More about cross-leaved heath

About Cross-leaved heath

Erica tetralix · also called Cross-leaved heath, Bog heather · flowering

Cross-leaved heath is a low, spreading moorland shrub native to wet, boggy heathlands across western and northern Europe. It bears small clusters of pale rose-pink urn-shaped flowers at shoot tips from June to September, with grey-green leaves arranged in distinctive whorls of four. Unlike most heathers, it thrives in moist to wet, highly acidic conditions.

Plant type: flowering

Watch for — Grey mould (Botrytis cinerea): Dense, damp foliage in stagnant air creates conditions for Botrytis. Grey fuzzy mould appears on foliage and flowers. Improve air circulation where possible and remove affected tissue promptly. Avoid overhead watering.

The reasons cross-leaved heath isn't blooming

Almost every non-blooming cross-leaved heath 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 cross-leaved heath 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 cross-leaved heath to flower

Maximise sun. Give cross-leaved heath 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 cross-leaved heath and get the feeding right with the cross-leaved heath 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

Cross-leaved heath 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 cross-leaved heath care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Cross-leaved heath blooming — frequently asked questions

Why won't my cross-leaved heath flower?

Cross-leaved heath 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 cross-leaved heath bloom?

Give cross-leaved heath 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 cross-leaved heath normally bloom?