Thalictrum flavum

Germination

Sow indoors at any time. Sow directly or into a coldframe in autumn. Sow onto moist well-drained seed compost. Just cover the seed with vermiculite or soil. Ideal temp. 15-20°C. Germination might occur. Keep soil moist but not wet at all times. Germination takes 15-21 days but can be erratic even with ideal conditions. If germination does not occur cold stratify, move to 4°C for 12 weeks, a fridge is ideal, then return to warmth 15-18°C for germination. Transplant seedlings when large enough to handle to 8cm pots. Plant out after danger of frost has passed. Coldframe or direct sowing should occur in autumn, where warmth followed by natural winter cold should offer ideal condition for germination to occur in spring as the weather warms.

Growing

Prefers cool places in semi shade, ideally a deep soil. In full sun requires more moisture. In exposed areas may require staking.

Cultivation

Cut down stems once flowering is over. To maintain vigour divide plant every 2-3 years as soon as growth begins in spring(Mar-April). Large divisions can be replanted outside, smaller ones overwintered in a greenhouse for planting out the following spring.