Tall bearded iris aftercare
Feed with a general fertiliser in spring, and again after flowering.
Cut away flowering stems when the last flowers are done.
Do not mulch, as the rhizomes need to have continual exposure to sunlight.
Keep clumps weed-free.
Divide and replant every three or four years, otherwise flowering will decline.
Lift the plant when flowering finishes, pull the rhizomes apart, discard any thin and damaged pieces, and choose fat, healthy ones – usually with a ‘flag’ of leaves at one end – for replanting.
Cut back stems after flowering
Divide and replant every few years