Getting it to bloom

Why won't my Buckley's Beardtongue bloom? (and how to make it flower)

Also called Buckley's Beardtongue, Buckley's Penstemon (Penstemon buckleyi).

More about buckley's beardtongue

About Buckley's Beardtongue

Penstemon buckleyi · also called Buckley's Beardtongue, Buckley's Penstemon · flowering

Penstemon buckleyi is a compact native perennial endemic to the southern Great Plains, occurring across sandy dune fields and high-plains grasslands from south-central Kansas and southeastern Colorado south to central Texas. It produces dense, leafy spikes of pale lavender to blue flowers with purple nectar guidelines from April to June, providing early-season pollen and nectar for native bees. Thriving in deep, sandy soils with full sun and excellent drainage, it is highly drought-tolerant and well suited to xeriscape and native prairie plantings. Penstemon is not listed on the ASPCA toxic or non-toxic plant database; treat with caution around pets.

Plant type: flowering

The reasons buckley's beardtongue isn't blooming

Almost every non-blooming buckley's beardtongue 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 buckley's beardtongue 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 buckley's beardtongue to flower

Maximise sun. Give buckley's beardtongue 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 buckley's beardtongue and get the feeding right with the buckley's beardtongue 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

Buckley's Beardtongue 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 buckley's beardtongue care brief and its watering schedule — a stressed, badly watered plant rarely has the energy to flower at all.

Buckley's Beardtongue blooming — frequently asked questions

Why won't my buckley's beardtongue flower?

Buckley's Beardtongue 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 buckley's beardtongue bloom?

Give buckley's beardtongue 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 buckley's beardtongue normally bloom?