How to Mulch Garlic for Winter
Cover fall planted garlic with 3 to 4 inches of weed free straw or shredded leaves after planting. In spring, pull it back after hard freezes end or leave...
Published by ThriveThyme
garlic mulch winter fall garden
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How to Mulch Garlic for Winter
Cover the bed with 3 to 4 inches of weed seed free straw or leaves after you plant the cloves (University of Minnesota Extension). New Hampshire Extension gives a 4 inch layer of straw, leaves, or grass clippings and waits until the ground is frozen. Both work. The mulch evens out soil temperature through winter and early spring, keeps frost from heaving cloves out of the ground, and holds weeds down next year.
Still need to plant? Find your window on the Garlic Desk and in when to plant garlic by zone.
When to Mulch
- Right after planting. Minnesota says to cover beds with 3 to 4 inches of mulch after planting.
- Or once the ground freezes. New Hampshire adds mulch once the ground is frozen.
- If you are late, mulch whenever you can. A frozen bed can still be covered.
Garlic is different from perennials here. Minnesota says to mulch after planting, so you do not need to wait for frozen soil.
Check your other plants on the Winter Mulch Desk.
What to Use
- Straw. Straw free of weed seed is the standard (Minnesota). Hay carries weed seed.
- Shredded leaves. Both Minnesota and New Hampshire list leaves. Shred them first so they do not mat. See how to shred leaves for garden mulch.
- Grass clippings. New Hampshire lists them. Skip clippings from lawns treated with weed killer.
How Much
A 4 by 8 foot bed at 4 inches takes about 10.7 cubic feet of mulch. The Winter Mulch Desk works it out for each bed. See how much winter mulch you need for the math.
Spring
- Minnesota says to remove mulch after the threat of hard freezes is over so the soil warms, or leave it on to control weeds and keep moisture in.
- Watch the shoots. If some cannot push through, loosen the mulch over them (New Hampshire). Minnesota notes this can happen with some softneck types.
- Garlic shoots handle air down to about 20 F. Below 10 F, plants can die or form poor bulbs (Minnesota).
Zone Notes
- Cold zones (3 to 6): Mulch is standard. Hardneck types are the usual pick. See the garlic hardiness zone guide.
- Mild zones (7 and up): Mulch still keeps weeds down and soil moist. The ground may not freeze, so mulch after planting.
Next Steps
- Plant and track your bed on the Garlic Desk.
- See when to harvest garlic for next summer.
- Need seed garlic? Seeds Now sells seed garlic while the fall window is open.