Getting it to bloom

Why won't my Rough Hawk's-beard bloom? (and how to make it flower)

Also called Rough Hawk's-beard, Biennial Hawk's-beard (Crepis biennis).

More about rough hawk's-beard

About Rough Hawk's-beard

Crepis biennis · also called Rough Hawk's-beard, Biennial Hawk's-beard · flowering

Rough Hawk's-beard is a biennial native of European meadows, road verges, and rough grassland, naturalised across the UK. In its first year it forms a flat rosette of rough, hispid leaves; in its second year it sends up branched stems to 1.2 m bearing numerous yellow dandelion-like flower heads from May to July, after which it sets seed and dies. The key care fact for wildflower gardens is to allow some plants to set seed each year to maintain continuity, as no plant persists beyond two years. It is considered non-toxic to pets.

Plant type: flowering

Watch for — Powdery mildew on second-year stems: White powdery fungal coating is common on flowering stems in warm, dry summers; ensure adequate plant spacing for airflow and remove heavily infected material after seed-set.

The reasons rough hawk's-beard isn't blooming

Almost every non-blooming rough hawk's-beard 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 rough hawk's-beard 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 rough hawk's-beard to flower

Maximise sun. Give rough hawk's-beard 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 rough hawk's-beard and get the feeding right with the rough hawk's-beard 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

Rough Hawk's-beard 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 rough hawk's-beard care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Rough Hawk's-beard blooming — frequently asked questions

Why won't my rough hawk's-beard flower?

Rough Hawk's-beard 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 rough hawk's-beard bloom?

Give rough hawk's-beard 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 rough hawk's-beard normally bloom?