Getting it to bloom

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

Also called Sienna Sunset Tickseed, Warm Shades Coreopsis (Coreopsis 'Sienna Sunset').

More about coreopsis 'sienna sunset'

About Coreopsis 'Sienna Sunset'

Coreopsis 'Sienna Sunset' · also called Sienna Sunset Tickseed, Warm Shades Coreopsis · flowering

Coreopsis 'Sienna Sunset' is a warm-toned perennial tickseed bearing single daisy flowers in rich blends of orange, copper, and sienna-red from summer into autumn. It forms a neat, compact clump and is heat- and drought-tolerant once established in full sun and well-drained soil. Coreopsis is non-toxic to pets per the ASPCA.

Plant type: flowering

Watch for — Colour fading in heat: Very high summer temperatures can bleach the warm sienna tones. In hot climates, light afternoon shade may preserve flower colour.

The reasons coreopsis 'sienna sunset' isn't blooming

Almost every non-blooming coreopsis 'sienna sunset' 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 coreopsis 'sienna sunset' 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 coreopsis 'sienna sunset' to flower

Maximise sun. Give coreopsis 'sienna sunset' 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 coreopsis 'sienna sunset' and get the feeding right with the coreopsis 'sienna sunset' 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

Coreopsis 'Sienna Sunset' 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 coreopsis 'sienna sunset' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Coreopsis 'Sienna Sunset' blooming — frequently asked questions

Why won't my coreopsis 'sienna sunset' flower?

Coreopsis 'Sienna Sunset' 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 coreopsis 'sienna sunset' bloom?

Give coreopsis 'sienna sunset' 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 coreopsis 'sienna sunset' normally bloom?