Getting it to bloom

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

Also called Mexican Fleabane, Santa Barbara Daisy, Karwinski's Fleabane, Profusion Daisy (Erigeron karvinskianus).

More about mexican fleabane

About Mexican Fleabane

Erigeron karvinskianus · also called Mexican Fleabane, Santa Barbara Daisy · flowering

Mexican Fleabane is a sprawling, semi-evergreen perennial producing an endless succession of small white-to-pink daisy flowers from late spring through autumn. A prolific self-seeder, it naturalises beautifully in wall crevices, paving gaps, and rockeries. Tough and drought-tolerant once established, it requires minimal care beyond occasional trimming to prevent it smothering neighbours.

Plant type: flowering

Watch for — Excessive self-seeding: Can spread aggressively in mild climates, seeding into wall crevices, paths, and neighbouring plants. Deadhead spent flowers before seed sets if spread needs controlling, or remove unwanted seedlings while small.

The reasons mexican fleabane isn't blooming

Almost every non-blooming mexican fleabane 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 mexican fleabane 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 mexican fleabane to flower

Maximise sun. Give mexican fleabane 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 mexican fleabane and get the feeding right with the mexican fleabane 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

Mexican Fleabane 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 mexican fleabane care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Mexican Fleabane blooming — frequently asked questions

Why won't my mexican fleabane flower?

Mexican Fleabane 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 mexican fleabane bloom?

Give mexican fleabane 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 mexican fleabane normally bloom?