Getting it to bloom

Why won't my Thyme-Leaved Edraianthus bloom? (and how to make it flower)

Also called Thyme-leaved Edraianthus, Rocky Bells, Grassy Bells (Edraianthus serpyllifolius).

More about thyme-leaved edraianthus

About Thyme-Leaved Edraianthus

Edraianthus serpyllifolius · also called Thyme-leaved Edraianthus, Rocky Bells · flowering

Edraianthus serpyllifolius is a mat-forming alpine bellflower native to rocky limestone outcrops in the Balkans, producing deep violet-purple, upward-facing bell flowers in late spring to early summer. It grows to roughly 5 cm tall and shares with its close relative E. pumilio an absolute requirement for sharply drained, alkaline soil and full sun. Winter wet is its chief enemy and the most important care fact to observe. As with all Edraianthus, it is not individually assessed by the ASPCA, so it should be treated as mildly-toxic as a precaution.

Plant type: flowering

The reasons thyme-leaved edraianthus isn't blooming

Almost every non-blooming thyme-leaved edraianthus 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 thyme-leaved edraianthus 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 thyme-leaved edraianthus to flower

Maximise sun. Give thyme-leaved edraianthus 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 thyme-leaved edraianthus and get the feeding right with the thyme-leaved edraianthus 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

Thyme-Leaved Edraianthus 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 thyme-leaved edraianthus care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Thyme-Leaved Edraianthus blooming — frequently asked questions

Why won't my thyme-leaved edraianthus flower?

Thyme-Leaved Edraianthus 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 thyme-leaved edraianthus bloom?

Give thyme-leaved edraianthus 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 thyme-leaved edraianthus normally bloom?