Getting it to bloom

Why won't my Rudbeckia 'Autumn Colors' bloom? (and how to make it flower)

Also called Autumn Colors black-eyed Susan, Bicolour coneflower (Rudbeckia hirta 'Autumn Colors').

More about rudbeckia 'autumn colors'

About Rudbeckia 'Autumn Colors'

Rudbeckia hirta 'Autumn Colors' · also called Autumn Colors black-eyed Susan, Bicolour coneflower · flowering

Rudbeckia hirta 'Autumn Colors' is a multicoloured black-eyed Susan offering a rich palette of reds, bronzes, golds, and mahogany on 60-75 cm stems. The contrasting dark centres provide bold late-summer and autumn interest. Drought-tolerant once established and excellent for pollinators, borders, and cutting.

Plant type: flowering

The reasons rudbeckia 'autumn colors' isn't blooming

Almost every non-blooming rudbeckia 'autumn colors' 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 rudbeckia 'autumn colors' 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 rudbeckia 'autumn colors' to flower

Maximise sun. Give rudbeckia 'autumn colors' 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 rudbeckia 'autumn colors' and get the feeding right with the rudbeckia 'autumn colors' 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

Rudbeckia 'Autumn Colors' 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 rudbeckia 'autumn colors' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Rudbeckia 'Autumn Colors' blooming — frequently asked questions

Why won't my rudbeckia 'autumn colors' flower?

Rudbeckia 'Autumn Colors' 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 rudbeckia 'autumn colors' bloom?

Give rudbeckia 'autumn colors' 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 rudbeckia 'autumn colors' normally bloom?