Rehmannia glutinosa
adhesive rehmannia
A half-hardy rhizomatous perennial to 30cm, forming a basal rosette of sticky, coarsely-toothed, obovate leaves and sending out slender runners. Pendent, tubular two-lipped flowers to 7.5cm long, reddish-brown with pale pink lips and purple markings in the throat, are produced in small clusters on short stems or singly in the axils of leafy flowering stems, from late spring to early summer. Leaves, stems and flowers have a covering of fine downy hairs
Size
Ultimate height
0.1–0.5 metresTime to ultimate height
1–2 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drainedpH
Acid, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Red Pink Purple | Green | ||
|---|---|---|---|---|
| Summer | Red Pink Purple | Green | ||
| Autumn | Green | |||
| Winter | Green |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H3Botanical details
- Family
- Orobanchaceae
- Native to GB / Ireland
- No
- Foliage
- Semi evergreen
- Habit
- Clump forming
- Genus
Rehmannia are erect perennials with large leaves in basal rosettes, and large, 2-lipped, trumpet-shaped flowers
- Name status
Unresolved
How to grow
Cultivation
In mild, frost-free areas, grow in well-drained, moderately fertile soil, in a sheltered position in full sun. In colder areas, grow in under glass or in containers that can be moved to a cool, dry place indoors over winter. Under glass, grow in peat-free, loam-based potting compost in bright, filtered light, water freely while in growth and keep just moist in winter
Propagation
Propagate by seed sown at 13-16°C (55-61°F) in late winter, by root cuttings in late autumn, or by softwood cuttings from basal shoots before flowering
Suggested planting locations and garden types
- Cottage and informal garden
- Wildflower meadow
Pruning
No pruning required
Pests
May be susceptible to slug and snail damage
Diseases
Generally disease-free
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