Getting it to bloom

Why won't my Japanese Maple 'Sango Kaku' bloom? (and how to make it flower)

Also called coral bark maple (Acer palmatum 'Sango Kaku').

More about japanese maple 'sango kaku'

About Japanese Maple 'Sango Kaku'

Acer palmatum 'Sango Kaku' · also called coral bark maple · flowering

'Sango Kaku' is a coral-bark Japanese maple grown for vivid red-pink winter twigs and gold autumn foliage. It is an upright, slow deciduous tree thriving in dappled shade with shelter from wind and scorching afternoon sun. Spring leaves emerge yellow-green. Best in moist, acidic, free-draining soil and reliably hardy in temperate gardens.

Plant type: flowering

The reasons japanese maple 'sango kaku' isn't blooming

Almost every non-blooming japanese maple 'sango kaku' 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 japanese maple 'sango kaku' 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 japanese maple 'sango kaku' to flower

Maximise sun. Give japanese maple 'sango kaku' 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 japanese maple 'sango kaku' and get the feeding right with the japanese maple 'sango kaku' 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

Japanese Maple 'Sango Kaku' 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 japanese maple 'sango kaku' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Japanese Maple 'Sango Kaku' blooming — frequently asked questions

Why won't my japanese maple 'sango kaku' flower?

Japanese Maple 'Sango Kaku' 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 japanese maple 'sango kaku' bloom?

Give japanese maple 'sango kaku' 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 japanese maple 'sango kaku' normally bloom?