Beardlip penstemon
Penstemon barbatus · Plantaginaceae
📷 Wikimedia Commons · CC BY-SA 3.0
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around beardlip penstemon and prepare for winter.
ID card
- Common name
- Beardlip Penstemon
- Family
- Plantaginaceae
- Plant type
- Herbaceous perennial
- Blooming
- June to August
- Adult height
- 60 to 90 cm tall
- Foliage
- Deciduous
- Hardiness
- Down to -15 °C
- Origin
- Mountainous regions of North America
Expert tips
The key tip
Laissez le sol sécher entre deux arrosages : le Penstemon barbatus déteste l'humidité stagnante qui pourrit ses racines. En conteneur, percez bien le fond et utilisez un substrat drainant (terreau + sable grossier). Une fois établi, il demande peu d'eau sauf en période de chaleur extrême.
The common mistake
La plupart des jardiniers tuent leur Penstemon en l'arrosant trop régulièrement, surtout en automne et hiver. C'est la cause numéro un de l'effondrement.
The pro's trick
Pincez les extrémités des jeunes tiges au printemps (avril-mai) pour forcer la ramification et obtenir une touffe dense et très fleurie. Attendez que la plante atteigne 15 cm avant le premier pinçage.
Seasonal watch
En automne-hiver, regardez attentivement le drainage : les pluies répétées associées au sol froid créent des poches d'humidité qui fissurillent la couronne. Surélevez légèrement la plante ou paillez avec des graviers autour du collet pour casser cette humidité hivernale.
Care
Exposure and Light
Penstemon barbatus thrives in full sun, requiring at least 6 hours of direct light daily. A well-lit exposure promotes abundant and generous flowering. In very hot climates, light afternoon shade can be beneficial.
Soil and Drainage
This plant prefers well-drained, rocky or sandy soil, preferably slightly alkaline or neutral. Soil that is too rich or too moist can cause root rot. Improve drainage with gravel or sand if necessary.
Watering
Water moderately during the growing period, allowing the soil to dry slightly between waterings. Once established, penstemon will tolerate dry periods. Reduce watering in autumn and winter to prevent waterlogging.
Fertilization
A balanced fertilizer application in spring is generally sufficient. Avoid excess nitrogen, which promotes foliage at the expense of flowering. Poor soil actually suits this frugal plant even better.
Pruning and Maintenance
Pinch young plants in spring to encourage a bushy habit. After flowering, remove spent flowers to stimulate additional blooms. Cut back the plant in autumn or early spring to remove dried stems.
Diseases and Pests
Penstemon barbatus is generally robust. Watch for powdery mildew in case of excessive humidity and root rot in poorly drained soil. Aphids may occasionally affect it early in the season.
Did you know?
The name 'barbatus' refers to the hairy (bearded) stamens that adorn the inside of the characteristic red-orange tubular flowers. These plants are highly appreciated by hummingbirds and bumblebees that pollinate them in North America, and are excellent allies for ecological gardens.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
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- Coral plantRusselia equisetiformis
- Bunchleaf penstemonPenstemon heterophyllus
Tips generated and checked by Viridia — adapt them to your local climate.