Getting it to bloom

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

Also called Prickly Crossandra, Firecracker Plant (Crossandra pungens).

More about prickly crossandra

About Prickly Crossandra

Crossandra pungens · also called Prickly Crossandra, Firecracker Plant · flowering

A low-growing African Crossandra species with dark, glossy, spine-tipped leaves and vivid yellow-to-orange flower spikes that attract butterflies and hummingbirds. More heat-tolerant than the Indian species, it works as a groundcover or container plant in tropical and subtropical gardens. Needs bright light, consistent moisture, and warmth to flower freely.

Plant type: flowering

Watch for — Sparse or no flowering: Insufficient light is the primary cause. Move to a brighter position with filtered sun. Ensure temperatures remain above 18°C and avoid overfertilising with nitrogen, which promotes foliage at the expense of flowers.

The reasons prickly crossandra isn't blooming

Almost every non-blooming prickly crossandra 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 prickly crossandra 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 prickly crossandra to flower

Maximise sun. Give prickly crossandra 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 prickly crossandra and get the feeding right with the prickly crossandra 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

Prickly Crossandra 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 prickly crossandra care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Prickly Crossandra blooming — frequently asked questions

Why won't my prickly crossandra flower?

Prickly Crossandra 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 prickly crossandra bloom?

Give prickly crossandra 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 prickly crossandra normally bloom?