Tansy: Sowing, planting and harvest calendar
When and how should you sow tansy outdoors?
Sow common tansy, Tanacetum vulgare, in spring once the soil is warming and workable. Choose a sunny, freely draining area that you can access to monitor growth. This perennial can spread through rhizomes and seeds, so reserve a place where you can control new growth. Avoid spreading it into natural habitats and sow only the amount you need.
Remove competing weeds and prepare a fine surface. Scatter the small seeds without crowding, then cover with a very thin layer of fine soil. Do not routinely bury them 1 cm deep. Firm gently and water with a fine spray to establish contact without washing seed away. Mark the position to avoid removing seedlings while weeding.
Maintain steady moisture without waterlogging and allow time for emergence, which depends on conditions and the seed lot. One to two weeks is not guaranteed. After true leaves develop, thin to at least roughly 30 cm between young plants, then adapt space as clumps grow. Do not spray soap preventively. Tansy is poisonous if swallowed: do not confuse this ornamental sowing with a crop of culinary leaves.
When does tansy flower?
