🧄When to Plant Garlic in USDA Zone 6b (2026 Guide)
Planted in fall, harvested next summer. The set-it-and-forget-it crop. Here is the cool-season planting schedule for garlic in zone 6b (covering areas like Washington DC, Lexington KY). All dates are based on 2026 frost data for your zone.
Direct sow
Sep 30
Harvest From
May 28
Because garlic is a cool-season crop, it tolerates light frost and can go out around Sep 30, before zone 6b's average last frost on Apr 15.
- Type: Cool-season
- Method: Direct sow
- Days to harvest: 240
- Spacing: 6" apart
- Sun: Full sun
- Zone 6b frost: Apr 15 – Oct 20
- Season length: ~188 days
- Companions: tomato, carrot, beets
Growing garlic in zone 6b
Zone 6b has an average last spring frost around Apr 15 and a first fall frost around Oct 20, giving roughly 188 frost-free growing days. That window comfortably fits garlic's 240-day cycle, so plant on time to make the most of the season.
Garlic resents transplanting, so direct sow it right in the garden around Sep 30. Give each plant about 6 inches of space in full sun.
Zone 6b specific growing notes
In zone 6b (Washington DC, Lexington KY), your 188-day growing season means garlic should be one of your first spring plantings. Cool-season crops thrive in the mild part of your growing window. Monitor soil temperature — garlic germinates best when soil is 40-75°F.
Your first fall frost around Oct 20 means your last possible harvest is roughly late Oct. For a continuous supply, consider planting early and using season extension techniques like row covers.
Pro tip for garlic
Crack bulbs and plant individual cloves pointy-side up, 2 inches deep and 6 inches apart. The largest cloves produce the largest bulbs—save the biggest for planting, cook with the small ones.
Troubleshooting garlic
Garlic rust appears as orange-brown powdery spots on leaves. It spreads in humid conditions with poor airflow. Space plants adequately, avoid overhead watering, and remove infected leaves promptly.
Growing garlic in containers
6-inch deep containers work with 4-inch spacing between cloves. A 5-gallon grow bag holds 8-10 plants. Mulch heavily with straw after planting for winter insulation in zones 3-6.
Can you plant garlic twice a year?
No—garlic is planted in fall (October-November) and harvested the following summer (July), an 8-9 month cycle. It occupies the bed for nearly a year, so plan space accordingly.
Frequently asked questions
When should I plant garlic in zone 6b?
Direct sow around Sep 30. Because garlic is a cool-season crop, it tolerates light frost and can go out around Sep 30, before zone 6b's average last frost on Apr 15.
How long does garlic take to grow in zone 6b?
About 240 days from sowing to first harvest. A Sep 30 planting in zone 6b is typically ready to pick from around May 28. Zone 6b has about 188 frost-free days — plenty of time if you plant on schedule.
How far apart should I space garlic?
Space garlic about 6 inches apart in full sun. This gives each plant enough room for roots to spread and leaves to catch sunlight without competing.
What is the best tip for growing garlic?
Crack bulbs and plant individual cloves pointy-side up, 2 inches deep and 6 inches apart. The largest cloves produce the largest bulbs—save the biggest for planting, cook with the small ones.
What are common problems with garlic and how do I fix them?
Garlic rust appears as orange-brown powdery spots on leaves. It spreads in humid conditions with poor airflow. Space plants adequately, avoid overhead watering, and remove infected leaves promptly.
Can I grow garlic in a container?
6-inch deep containers work with 4-inch spacing between cloves. A 5-gallon grow bag holds 8-10 plants. Mulch heavily with straw after planting for winter insulation in zones 3-6.
Can I plant a second crop of garlic for fall harvest?
No—garlic is planted in fall (October-November) and harvested the following summer (July), an 8-9 month cycle. It occupies the bed for nearly a year, so plan space accordingly.
What grows well next to garlic?
Good companion plants for garlic are tomato, carrot, beets. Avoid planting near warm-season crops that compete for space and nutrients. Garlic also benefits from crop rotation — do not plant it in the same spot year after year.