John Fielding 
A half-hardy biennial or triennial plant forming a rosette of silvery leaves to 50cm across. In its second or third summer it throws up a flower spike to 1.8m tall; this is densely packed with small white flowers that are irrisistible to bees
1.5-2.5 metres
0.5-1 metres
| Season | Stem | Flower | Foliage | Fruit |
|---|---|---|---|---|
| Spring | ||||
| Summer | ||||
| Autumn | ||||
| Winter |
Under glass grow in peat-free, loam-based compost in full light. Water freely while in growth, sparingly in winter. Outdoors grow in moderately fertile, freely-draining soil in a very sheltered, sunny, warm site. Protect from winter frosts in-situ using biodegradable horticultural fleece
Propagate by seed sown at 13-16°C in summer, overwintering seedlings at 5-7°C
No pruning required
May be susceptible to slugs or glasshouse whitefly and glasshouse red spider mite under glass
Generally disease-free