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Annual BiennialConservatory GreenhouseHerbaceous Perennial
Size
Ultimate height
1.5–2.5 metresTime to ultimate height
2–5 yearsUltimate spread
1.5–2.5 metresGrowing conditions
Loam
Moisture
Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | ||||
|---|---|---|---|---|
| Summer | ||||
| Autumn | ||||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H1CBotanical details
- Family
- Boraginaceae
- Native to the UK
- No
- Foliage
- Evergreen
- Habit
- Columnar upright
- Potentially harmful
- Skin irritant. Wear gloves and other protective equipment when handling
- Genus
Echium can be annuals, biennials, evergreen perennials or shrubs, with simple, coarsely hairy leaves and funnel-shaped flowers borne in panicles or dense spikes in summer
- Name status
Correct
- Plant range
- Canary Islands
How to grow
Cultivation
Grow under glass in peat-free, loam-based potting compost in full light, or overwinter rosettes in a frost-free greenhouse and move outdoors in summer
Propagation
Propagate by seed
Suggested planting locations and garden types
- Mediterranean climate plants
- Patio and container plants
- Sub-tropical
Pruning
No pruning required
Pests
May be susceptible to slugs or glasshouse whitefly and glasshouse red spider mite under glass
Diseases
Generally disease-free
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.