Getting it to bloom

Why won't my Sanguisorba menziesii bloom? (and how to make it flower)

Also called Menzies' burnet, Alaska burnet (Sanguisorba menziesii).

More about sanguisorba menziesii

About Sanguisorba menziesii

Sanguisorba menziesii · also called Menzies' burnet, Alaska burnet · flowering

An early-flowering burnet from northern wetlands bearing plump, deep wine-red bottlebrush flower heads from late spring above bold, glaucous blue-green pinnate foliage. Vigorous and showy, Menzies' burnet reaches around 1 m and excels in damp, sunny borders. Hardy and much loved by bees, it lends strong colour and architectural form to naturalistic plantings.

Plant type: flowering

Watch for — Drying out: This wetland species suffers quickly in dry soil, with scorched leaves and poor flowering; keep ground consistently moist.

The reasons sanguisorba menziesii isn't blooming

Almost every non-blooming sanguisorba menziesii 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 sanguisorba menziesii 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 sanguisorba menziesii to flower

Maximise sun. Give sanguisorba menziesii 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 sanguisorba menziesii and get the feeding right with the sanguisorba menziesii 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

Sanguisorba menziesii 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 sanguisorba menziesii care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Sanguisorba menziesii blooming — frequently asked questions

Why won't my sanguisorba menziesii flower?

Sanguisorba menziesii 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 sanguisorba menziesii bloom?

Give sanguisorba menziesii 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 sanguisorba menziesii normally bloom?