Getting it to bloom

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

Also called Jethro Tull Tickseed, Flute Coreopsis (Coreopsis 'Jethro Tull').

More about coreopsis 'jethro tull'

About Coreopsis 'Jethro Tull'

Coreopsis 'Jethro Tull' · also called Jethro Tull Tickseed, Flute Coreopsis · flowering

Coreopsis 'Jethro Tull' is a distinctive perennial tickseed with uniquely tubular, quilled golden-yellow petals that give its flowers a flute-like appearance. It blooms from late spring through summer, forming a compact mound of attractive foliage. Best in full sun with excellent drainage. Coreopsis is non-toxic to dogs and cats per the ASPCA.

Plant type: flowering

Watch for — Aster yellows: Phytoplasma disease causing distorted flowers. Remove and destroy affected plants; prevent by controlling leafhoppers.

The reasons coreopsis 'jethro tull' isn't blooming

Almost every non-blooming coreopsis 'jethro tull' 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 'jethro tull' 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 'jethro tull' to flower

Maximise sun. Give coreopsis 'jethro tull' 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 'jethro tull' and get the feeding right with the coreopsis 'jethro tull' 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 'Jethro Tull' 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 'jethro tull' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Coreopsis 'Jethro Tull' blooming — frequently asked questions

Why won't my coreopsis 'jethro tull' flower?

Coreopsis 'Jethro Tull' 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 'jethro tull' bloom?

Give coreopsis 'jethro tull' 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 'jethro tull' normally bloom?