Garlic runs on an unusual calendar compared to most vegetables: you plant it in fall, it sits quietly through winter, and you don’t harvest until the following summer. That long, cold dormancy period is actually essential to how garlic forms proper bulbs, which is why spring-planted garlic almost always underperforms.
The best planting window
Aim to plant garlic about four to six weeks before your ground typically freezes solid — this gives the cloves enough time to grow roots and a small amount of top growth before winter sets in, without pushing up tall, vulnerable shoots. For most of the United States, that window falls somewhere between mid-September and early November, with colder northern regions planting earlier and milder southern regions planting later, sometimes into December.
Why fall planting beats spring planting
Garlic needs a sustained period of cold — generally six to eight weeks below about 40°F — to trigger the process that splits a single clove into a full head of multiple cloves. Garlic planted in spring often skips this properly, resulting in small, single-clove bulbs rather than the multi-clove heads you’re used to seeing at the store.
Choosing the right garlic to plant
Skip the garlic from the grocery store, which is often treated to prevent sprouting and may not be suited to your climate. Instead, buy seed garlic from a local nursery or garden supplier, choosing hardneck varieties for colder climates (they tolerate freezing better and produce a bonus edible flower stalk called a scape) or softneck varieties for milder climates (they store longer and are the type typically braided).
How to plant it
- Break the bulb into individual cloves right before planting, leaving the papery skin on each clove intact.
- Choose a sunny spot with well-draining soil, amended with compost.
- Plant each clove pointy end up, about 2 inches deep and 4 to 6 inches apart.
- Water once after planting to settle the soil.
- Once the ground has fully frozen, add a 3- to 4-inch layer of mulch (straw works well) to insulate through winter.
What happens over winter and spring
Cloves will send down roots in fall, and in many climates you’ll see a small green shoot emerge before winter fully sets in — that’s normal and won’t harm the plant. Pull back mulch gradually in early spring as the weather warms, and growth will resume quickly once soil temperatures rise.
Caring for garlic through the growing season
Garlic needs consistent moisture in spring while bulbs are forming, but should be watered less as summer approaches and the plant naturally starts to die back. If you’re growing hardneck garlic, cut off the curly flower scapes when they appear in early summer — this redirects the plant’s energy into bulb size instead of flowering, and the scapes themselves are a tasty, mild garlic-flavored vegetable.
Knowing when to harvest
Garlic is typically ready in mid- to late summer, when the lower third to half of the leaves have turned brown while the top leaves are still green. Dig (don’t pull) the bulbs carefully, then cure them in a dry, shaded, well-ventilated spot for two to three weeks before trimming and storing — this curing step is what allows garlic to store for months rather than spoiling quickly.