How to divide hemerocallis

Ageing summer-flowering perennials like day lilies are a doddle to divide. Carol Klein shows you how to breathe new life into them by dividing large clumps.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
To do
To do

Do not To do in January

Do not To do in February

Do not To do in March

Do not To do in April

Do not To do in May

Do not To do in June

Do not To do in July

Do not To do in August

Do not To do in September

Do To do in October

Do not To do in November

Do not To do in December

Autumn is a great time to divide summer-flowering perennials, after they’ve finished their display. Carol Klein selects a large clump of day lilies (Hemerocallis) and explains how to tell if it’s overcrowded. By dividing the clump, you’ll not only reinvigorate it, you’ll also get new plants for free. In this short video clip from Gardeners’ World, Carol demonstrates how to dig up and split a mature clump of perennials, then prepare the resulting smaller sections ready for replanting around the garden.