Getting it to bloom

Why won't my Dwarf Astilbe 'Pumila' bloom? (and how to make it flower)

Also called Dwarf Chinese astilbe, Creeping astilbe (Astilbe chinensis var. pumila).

More about dwarf astilbe 'pumila'

About Dwarf Astilbe 'Pumila'

Astilbe chinensis var. pumila · also called Dwarf Chinese astilbe, Creeping astilbe · flowering

Astilbe chinensis var. pumila is a low, ground-hugging dwarf astilbe that spreads by rhizomes to form a dense mat of lacy green foliage topped with stubby mauve-pink plumes in late summer. The most drought- and sun-tolerant astilbe, it makes an excellent shaded groundcover and edging plant, knitting together to suppress weeds in damp borders.

Plant type: flowering

The reasons dwarf astilbe 'pumila' isn't blooming

Almost every non-blooming dwarf astilbe 'pumila' 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 dwarf astilbe 'pumila' 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 dwarf astilbe 'pumila' to flower

Maximise sun. Give dwarf astilbe 'pumila' 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 dwarf astilbe 'pumila' and get the feeding right with the dwarf astilbe 'pumila' 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

Dwarf Astilbe 'Pumila' 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 dwarf astilbe 'pumila' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Dwarf Astilbe 'Pumila' blooming — frequently asked questions

Why won't my dwarf astilbe 'pumila' flower?

Dwarf Astilbe 'Pumila' 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 dwarf astilbe 'pumila' bloom?

Give dwarf astilbe 'pumila' 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 dwarf astilbe 'pumila' normally bloom?