Siler montanum
A hardy, clump-forming, architectural deciduous perennial with deeply divided blue-green foliage and large umbels of pink to white flowers which appear in early summer. Good for pollinating insects. Seed heads can be left over winter
0.5-1 metres
0.1-0.5 metres
Grow in well-drained soil, gravel or rock gardens in full sun in a dry location
Propagate by fresh seed in autumn, or in a damp vermiculite mixture under glass with bottom heat for 3 weeks, then in cooler conditions for around 8 weeks prior to sowing
No pruning required. Deadhead regularly and cut back in autumn
Generally pest-free
Generally disease-free