Getting it to bloom

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

Also called yellow foxglove, large yellow foxglove (Digitalis grandiflora).

More about yellow foxglove

About Yellow Foxglove

Digitalis grandiflora · also called yellow foxglove, large yellow foxglove · flowering

Yellow foxglove is a hardy, often short-lived perennial bearing one-sided spires of soft primrose-yellow tubular flowers netted brown inside, in early to midsummer. Unlike the common biennial foxglove it returns year on year, thriving in part shade and humus-rich, moist but well-drained soil. All parts are toxic, containing heart-affecting cardiac glycosides.

Plant type: flowering

Watch for — Short-lived / dies out: Even as a perennial it often fades after a few years, especially on dry or heavy soil. Let some flowers set seed to maintain a self-renewing stand.

The reasons yellow foxglove isn't blooming

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

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

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

Yellow Foxglove blooming — frequently asked questions

Why won't my yellow foxglove flower?

Yellow Foxglove 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 yellow foxglove bloom?

Give yellow foxglove 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 yellow foxglove normally bloom?