How to propagate woolly thyme ground cover

Written by kim joyce
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How to propagate woolly thyme ground cover
If you're willing to get your garden gloves dirty, you can propagate your own woolly thyme. (gardening gloves image by Sandi Chetwynd from

Woolly thyme (Thymus pseudolanuginosus) is a sturdy, low-growing perennial groundcover that does well in full sun and well-drained soils. Gritty, poor soils that discourage other plants are perfect for thyme. This variety has soft, woolly grey-green leaves that turn purple in winter. Woolly thyme is vulnerable to root rot, but grows well in rock gardens and on dry slopes. Each plant can spread up to 18 inches. Thyme is a great self-propagator and will spread well on its own, but several techniques will help you speed the process.

Skill level:
Moderately Easy

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Things you need

  • Established clump or clumps of woolly time
  • Garden trowel
  • Garden shovel
  • Sharp garden clippers
  • Rooting hormones
  • Plastic window boxes
  • Cling film
  • Small garden pots

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  1. 1

    Dig up and move newly rooted thyme "runners" near established plants and transplant these where you want to establish new clumps of creeping thyme---the quickest and easiest way to start new plants.

  2. 2

    Propagate new plants from roots too, to generate still more new plants. In spring after the last frost when the ground is still damp, dig small, shallow holes (3 to 4 inches deep and across) where you will plant new thyme starts. Place your garden shovel, point down, near the edge of each root clump, then push down, under and up to lift and expose the soil-covered roots. Gently break off root plugs of 1 to 2 inches across, using just your hands or your hands and trowel, and immediately plant these, covering with soil and watering well to soak the roots. Replant the "parent" thyme plant in its original spot the same way.

  3. 3

    Start new plants from cuttings to create large quantities of plants. Take softwood cuttings in early summer, placing stems in water as you work to keep then fresh. Starting stems should be at least 3 to 4 inches long. Fill window box half full with clean, coarse sand. Dip each stem in rooting hormone, to a depth covering about one-third of the stem, then place each cutting in sand to that same depth. Cover each window box with cling film to maintain humidity. Keep the window box in a warm place with only indirect sunlight. Transplant rooted cuttings to small individual pots in 4 to 6 weeks. Plant in the garden the following spring.

  4. 4

    Grow new plants from seed too, if you'd prefer, but it can be difficult to find woolly thyme seed.

Tips and warnings

  • Woolly thyme is excellent for drought-resistant landscaping.
  • The tubular flowers of woolly thyme attract bees, and honey from bees that have dined on thyme is a delicacy.

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