Getting it to bloom

Why won't my Mouse-ear Hawkweed bloom? (and how to make it flower)

Also called Mouse-ear Hawkweed, Mouse-ear, Hawkweed (Pilosella officinarum).

More about mouse-ear hawkweed

About Mouse-ear Hawkweed

Pilosella officinarum · also called Mouse-ear Hawkweed, Mouse-ear · flowering

Pilosella officinarum (syn. Hieracium pilosella) is a low-growing, stoloniferous perennial native to grasslands and dry banks across Europe and the UK, producing solitary lemon-yellow dandelion-like flower heads on hairy scapes from May to August. It thrives in poor, well-drained soils in full sun and actually performs better with minimal fertility — rich soils encourage excessive leaf growth at the expense of flowers. The most important care point is to avoid overwatering, as it is highly susceptible to root rot in wet conditions. It is not listed by the ASPCA as toxic to cats or dogs; use with caution as data is limited.

Plant type: flowering

The reasons mouse-ear hawkweed isn't blooming

Almost every non-blooming mouse-ear hawkweed 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 mouse-ear hawkweed 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 mouse-ear hawkweed to flower

Maximise sun. Give mouse-ear hawkweed 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 mouse-ear hawkweed and get the feeding right with the mouse-ear hawkweed 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

Mouse-ear Hawkweed 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 mouse-ear hawkweed care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Mouse-ear Hawkweed blooming — frequently asked questions

Why won't my mouse-ear hawkweed flower?

Mouse-ear Hawkweed 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 mouse-ear hawkweed bloom?

Give mouse-ear hawkweed 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 mouse-ear hawkweed normally bloom?