The non-toxic barbel is considered to be conditionally hardy, with some varieties tolerant of frost quite well, while others are very sensitive to it. In any case, these varied plantain plants are an ornament for the perennial or rock garden.
While some varieties of penstemon can easily be overwintered outside, more sensitive varieties should be brought indoors
Only overwinter the more robust varieties in the bed, otherwise frost-free overwintering in the conservatory or in the greenhouse is recommended. Bedding plants should be protected from frost with a layer of brushwood or foliage.
Plant sensitive varieties of penstemon in a bucket in autumn. Take this opportunity to cut back the withered leaves right away, this makes health control easier. Water the penstemon only a little and refrain from fertilizing.
The essentials in brief:
- Hardiness varies by variety
- robust varieties may overwinter in the bed
- overwinter sensitive varieties frost-free
- do not fertilize
- pour little
tips
Prune potted plants in the fall to make it easier to check for pests or diseases.