Getting it to bloom

Why won't my Smooth Hydrangea 'Incrediball' bloom? (and how to make it flower)

Also called Incrediball Hydrangea (Hydrangea arborescens 'Abetwo').

More about smooth hydrangea 'incrediball'

About Smooth Hydrangea 'Incrediball'

Hydrangea arborescens 'Abetwo' · also called Incrediball Hydrangea · flowering

'Incrediball' is a smooth hydrangea bred as a sturdier-stemmed improvement on 'Annabelle', producing enormous globe-shaped white flower heads on strong stems that resist flopping. A very hardy, reliable deciduous shrub blooming on new wood, it flowers every summer regardless of winter cold, and the blooms age to soft green.

Plant type: flowering

Watch for — Wilting in sun and drought: Big soft leaves and flowers wilt fast when dry; site with afternoon shade, mulch and water deeply during heat.

The reasons smooth hydrangea 'incrediball' isn't blooming

Almost every non-blooming smooth hydrangea 'incrediball' 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 smooth hydrangea 'incrediball' 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 smooth hydrangea 'incrediball' to flower

Maximise sun. Give smooth hydrangea 'incrediball' 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 smooth hydrangea 'incrediball' and get the feeding right with the smooth hydrangea 'incrediball' 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

Smooth Hydrangea 'Incrediball' 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 smooth hydrangea 'incrediball' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Smooth Hydrangea 'Incrediball' blooming — frequently asked questions

Why won't my smooth hydrangea 'incrediball' flower?

Smooth Hydrangea 'Incrediball' 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 smooth hydrangea 'incrediball' bloom?

Give smooth hydrangea 'incrediball' 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 smooth hydrangea 'incrediball' normally bloom?