The best answer to when to plant garlic is in fall, roughly four to six weeks before the soil freezes solid, which means late September to early November in most of the US and UK. That gives the cloves time to grow roots before winter, then rest until spring.
Garlic needs a cold spell to form a proper bulb with separate cloves, so autumn planting beats spring planting almost everywhere. In very mild regions you can plant a little later, and in the coldest areas you plant a little earlier. The details below will help you pick the right week for your garden.
Quick Answer: Garlic Planting Time at a Glance
- Best season: fall, 4 to 6 weeks before the ground freezes.
- Cold climates: late September to mid October.
- Mild climates: late October to December.
- Depth and spacing: 2 inches (5 cm) deep, 4 to 6 inches (10 to 15 cm) apart, pointed end up.
- Harvest: the following midsummer, when the lower leaves turn brown.
Why Fall Is the Best Time to Plant Garlic
Garlic is planted as individual cloves, and each clove uses the cool months to build a strong root system. When spring warms up, the plant already has the roots to push out leaves quickly and size up the bulb. Cloves planted in spring often produce smaller bulbs, and hardneck types may not split into cloves well without a chilling period.
The aim is roots but not much top growth. A few green shoots poking up before winter is fine, but a tall tangle of leaves in December means the clove went in too early.
When to Plant Garlic by Zone
Use your first fall frost date as a guide, or check your zone on the USDA Plant Hardiness Zone Map. UK gardeners can use the same rule of thumb: plant between October and December, earlier on cold, heavy soil.
| USDA zone | Typical planting window | Notes |
|---|---|---|
| 3 to 4 | Mid September to early October | Mulch heavily after the first hard frost |
| 5 to 6 | Early October to early November | The classic fall window |
| 7 to 8 | Mid October to late November | Wait until soil cools below about 60°F (15°C) |
| 9 to 10 | November to December | Chill bulbs in the fridge for 4 to 8 weeks first if winters are very mild |
| UK | October to December | Softneck types can also go in January to February |
How to Plant Garlic Step by Step
- Buy seed garlic from a nursery or reputable supplier. Grocery store bulbs may carry disease or be treated to stop sprouting.
- Choose a sunny spot with loose, well-drained soil. Garlic rots in soggy ground, so use a raised bed if your soil is heavy.
- Mix in compost and loosen the soil to about 8 inches (20 cm).
- Break the bulb into cloves a day or two before planting, keeping the papery skin on each clove. Plant the largest ones.
- Set each clove pointed end up, about 2 inches (5 cm) deep, 4 to 6 inches (10 to 15 cm) apart, in rows 12 inches (30 cm) apart.
- Cover with soil, water once, then add 3 to 4 inches (7 to 10 cm) of straw or shredded leaves as mulch.
Hardneck vs Softneck: Which to Plant
| Feature | Hardneck | Softneck |
|---|---|---|
| Best climate | Cold winters | Mild winters |
| Flavor | Rich, often spicier | Milder |
| Scapes | Yes, edible in early summer | No |
| Storage life | About 4 to 6 months | Up to 9 to 12 months |
| Braiding | Not possible | Yes |
Caring for Garlic After Planting
Garlic needs little attention over winter. In spring, water about once a week if rain is scarce, and feed with a nitrogen-rich fertilizer once growth resumes. Stop feeding in late spring, since the bulb is sizing up. Remove hardneck scapes when they curl so the energy goes to the bulb. Stop watering about two weeks before harvest.
If you plan other autumn jobs, our guides on when to harvest garlic, building a raised bed and starting an herb garden pair well with this one.
Common Garlic Planting Mistakes and Fixes
- Planting too early: tall leaves before winter. Cover with mulch; they usually survive.
- Planting upside down: shoots struggle and bulbs are small. Always point the tip up.
- Soggy soil: cloves rot. Improve drainage or use a raised bed.
- Crowding: bulbs stay small. Keep at least 4 inches between cloves.
- Skipping mulch: frost heave can push cloves out of the ground. Mulch after the soil cools.
Conclusion
Get the timing right and garlic is one of the easiest crops to grow: plant healthy cloves in fall, mulch them, and leave them to do their work until summer. Check your zone, pick a hardneck or softneck type that suits your winters, and you will be rewarded with firm, flavorful bulbs.
FAQ
Can I plant garlic in spring?
Yes, as early as the soil can be worked, but bulbs are usually smaller. Softneck varieties handle spring planting better than hardneck.
Can I plant garlic from the grocery store?
It may grow, but store garlic can carry disease or be treated to prevent sprouting. Seed garlic suited to your region is a safer choice.
How deep should I plant garlic cloves?
About 2 inches (5 cm) deep with the pointed end up. In very cold climates, go slightly deeper and add extra mulch.
What happens if I plant garlic too late?
Late cloves can still grow if the ground is workable, but with less root growth you may get smaller bulbs. Mulch well and feed in spring.
How long does garlic take to grow?
Fall-planted garlic is ready about eight to nine months later, typically in June to August depending on your climate and variety.
