Getting it to bloom

Why won't my Dahlia 'Ace Summer Sunset' bloom? (and how to make it flower)

Also called Ace Summer Sunset dahlia, orange cactus dahlia (Dahlia 'Ace Summer Sunset').

More about dahlia 'ace summer sunset'

About Dahlia 'Ace Summer Sunset'

Dahlia 'Ace Summer Sunset' · also called Ace Summer Sunset dahlia, orange cactus dahlia · flowering

Dahlia 'Ace Summer Sunset' is a tuberous dahlia with vivid orange, spiky-petalled cactus-form blooms on tall, strong stems from midsummer to frost. A striking cut flower and border plant, it grows from a tender tuber lifted or mulched in cold areas. It wants full sun, rich free-draining soil, steady moisture, staking and regular deadheading.

Plant type: flowering

Watch for — Tall stems need staking: The large blooms on tall stems are prone to wind damage and flopping. Stake plants early and tie in as they grow to keep stems upright.

The reasons dahlia 'ace summer sunset' isn't blooming

Almost every non-blooming dahlia 'ace summer 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 dahlia 'ace summer 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 dahlia 'ace summer sunset' to flower

Maximise sun. Give dahlia 'ace summer 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 dahlia 'ace summer sunset' and get the feeding right with the dahlia 'ace summer 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

Dahlia 'Ace Summer 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 dahlia 'ace summer sunset' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Dahlia 'Ace Summer Sunset' blooming — frequently asked questions

Why won't my dahlia 'ace summer sunset' flower?

Dahlia 'Ace Summer 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 dahlia 'ace summer sunset' bloom?

Give dahlia 'ace summer 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 dahlia 'ace summer sunset' normally bloom?