Getting it to bloom

Why won't my Salvia × sylvestris 'Blauhügel' bloom? (and how to make it flower)

Also called Blue Hill sage, Blue Mound salvia (Salvia × sylvestris 'Blauhügel').

More about salvia × sylvestris 'blauhügel'

About Salvia × sylvestris 'Blauhügel'

Salvia × sylvestris 'Blauhügel' · also called Blue Hill sage, Blue Mound salvia · flowering

'Blauhügel' (Blue Hill) is a neat, mound-forming hardy sage carrying clear pure-blue flower spikes without the purple tones of darker cultivars. Compact and long-blooming, it suits the front of a sunny, well-drained border, attracts bees and butterflies, and rebounds strongly when deadheaded or sheared after its first flush.

Plant type: flowering

Watch for — Short bloom window: Without deadheading the flush is brief. Cut spent spikes back by a third to encourage repeat flowering through summer.

The reasons salvia × sylvestris 'blauhügel' isn't blooming

Almost every non-blooming salvia × sylvestris 'blauhügel' 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 salvia × sylvestris 'blauhügel' 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 salvia × sylvestris 'blauhügel' to flower

Maximise sun. Give salvia × sylvestris 'blauhügel' 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 salvia × sylvestris 'blauhügel' and get the feeding right with the salvia × sylvestris 'blauhügel' 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

Salvia × sylvestris 'Blauhügel' 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 salvia × sylvestris 'blauhügel' care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Salvia × sylvestris 'Blauhügel' blooming — frequently asked questions

Why won't my salvia × sylvestris 'blauhügel' flower?

Salvia × sylvestris 'Blauhügel' 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 salvia × sylvestris 'blauhügel' bloom?

Give salvia × sylvestris 'blauhügel' 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 salvia × sylvestris 'blauhügel' normally bloom?