Propagating Plants: Dividing Perennials

Use this method to propagate most herbaceous perennials and to rejuvenate large, tired clumps that no longer flower well.

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Flourishing PerennialsEnlarge Photo+Shrink Photo-DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited Dividing perennials, such as Achillea and Helenium, in early spring is an easy and economical way to fill large borders. After replanting, they will soon bulk up to form new flowering clumps.

Plants to Divide


yarrow
aster
bergenia
bellflower
geranium
Helenium
heuchera
hosta
iris
Ligularia
bee balm
catmint
phlox
Polemonium
lungwort
rudbeckia
sedum
speedwell

Dig Up Plant

In early spring, select a healthy clump of plants and water them well. Cut back any top growth to the ground. Using a fork, lift the clump, taking care to keep the whole root ball intact.

Dig Up Plant with Whole Root Ball IntactEnlarge Photo+Shrink Photo-DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

Divide With Forks

Cut solid crowns into portions with a spade or old knife. If you can't pry other pieces apart by hand, use two forks back-to-back to split the clump into smaller sections, ready for replanting.

Keep Plants from RegrowingEnlarge Photo+Shrink Photo-DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

Replant

Discard dead central portions of overgrown clumps. Replant healthy hand-sized pieces with strong buds in soil improved with well-composted organic matter. Water in well.

Replant Healthy PiecesEnlarge Photo+Shrink Photo-DK - How to Grow Practically Everything © 2010 Dorling Kindersley Limited

Excerpted from How to Grow Practically Everything

© 2010 Dorling Kindersley Limited

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