A deciduous, clump-forming herbaceous perennial with strap-shaped mid-green leaves and sturdy stems which produce panicles of trumpet-shaped purple-blue flowers, with a darker blue-purple midrib down the centre of each petal, in the summer
1-1.5 metres
0.5-1 metres
| Season | Stem | Flower | Foliage | Fruit |
|---|---|---|---|---|
| Spring | ||||
| Summer | ||||
| Autumn | ||||
| Winter |
Grow in fertile, moist but well-drained soil in full sun. In cold areas mulch in winter. In containers, grow in a peat-free, loam-based compost. May need winter protection. See agapanthus cultivation
Sow seed when ripe or in spring, keep in cold frame whilst small and protect in winter. Divide clumps in Spring every two-three years
Cut back in autumn as foliage goes brown. Cut back flower spikes as they go over, unless you want to keep seedheads for winter interest
May be susceptible to slugs and snails and agapanthus gall midge
May be susceptible to a virus