Getting it to bloom

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

Also called Prairie Coreopsis, Finger Coreopsis, Stiff Coreopsis (Coreopsis palmata).

More about prairie coreopsis

About Prairie Coreopsis

Coreopsis palmata · also called Prairie Coreopsis, Finger Coreopsis · flowering

Prairie Coreopsis is a tough, rhizomatous perennial native to the tallgrass prairie of the central and eastern US, bearing bright yellow daisy flowers on stiff stems in early to mid-summer. It spreads slowly by underground rhizomes to form colonies and is superbly adapted to dry, infertile soils, making it a reliable low-maintenance choice for prairie restorations and dry gardens.

Plant type: flowering

Watch for — Poor flowering in shade: Plants in partial shade produce sparse, weak-stemmed flowers. Relocate to a full-sun position; this species does not adapt well to shaded garden sites.

The reasons prairie coreopsis isn't blooming

Almost every non-blooming prairie coreopsis 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 prairie coreopsis 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 prairie coreopsis to flower

Maximise sun. Give prairie coreopsis 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 prairie coreopsis and get the feeding right with the prairie coreopsis 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

Prairie Coreopsis 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 prairie coreopsis care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Prairie Coreopsis blooming — frequently asked questions

Why won't my prairie coreopsis flower?

Prairie Coreopsis 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 prairie coreopsis bloom?

Give prairie coreopsis 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 prairie coreopsis normally bloom?