Getting it to bloom

Why won't my Foxglove Sage bloom? (and how to make it flower)

Also called Foxglove Sage (Salvia digitaliflora).

More about foxglove sage

About Foxglove Sage

Salvia digitaliflora · also called Foxglove Sage · flowering

Salvia digitaliflora is a rare, tall-growing perennial sage native to the high Andes of Peru and Bolivia, where it grows at altitude in moist, cool mountain conditions. It produces large, foxglove-like tubular flowers (the trait that gives it its name) on tall upright spikes, and is an uncommon plant in cultivation outside botanical collections. It requires a sheltered spot with good light, cool temperatures, and moist but well-drained, humus-rich soil; it is not cold-hardy in temperate lowland gardens and is best overwintered under glass in most of the UK and northern US. The Salvia genus is generally considered non-toxic to cats and dogs by the ASPCA.

Plant type: flowering

The reasons foxglove sage isn't blooming

Almost every non-blooming foxglove sage 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 foxglove sage 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 foxglove sage to flower

Maximise sun. Give foxglove sage 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 foxglove sage and get the feeding right with the foxglove sage 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

Foxglove Sage 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 foxglove sage care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Foxglove Sage blooming — frequently asked questions

Why won't my foxglove sage flower?

Foxglove Sage 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 foxglove sage bloom?

Give foxglove sage 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 foxglove sage normally bloom?