When to Plant Garlic in Missouri (2026 Guide)
Garlic is a fantastic crop for Missouri gardeners, providing a reliable harvest that can be stored for months. Hailing from the allium family, garlic requires minimal care after it's planted in the fall, allowing you to maximize your garden space. It's typically planted before the first frost hits, making fall an optimal time for preparation as temperatures begin to cool.
In Missouri, understanding your USDA hardiness zone is crucial for planning when to put garlic in the ground. For example, gardeners in Zone 6b can expect their last spring frost around April 10, while those in Zone 6a typically see their last frost around April 19. This timing significantly influences when to start your garlic and how to manage its growth throughout the seasons.
A successful garlic harvest requires attention to detail. Knowing that the cloves should be planted in fall lets you make better use of your gardening plots. By planning accordingly, you can enjoy a flavorful harvest by late summer, adding fresh garlic to your table while taking advantage of Missouri's unique growing conditions.
Planting Schedule by USDA Zone in Missouri
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6b | Start planting garlic cloves indoors September 1 – October 1, ~6 weeks before the first frost on April 10. | Transplant outdoors between October 1 – October 15 for optimal growth. | Direct sowing is not recommended for garlic; use cloves instead. | Harvest garlic between late June – early August, usually when 60–70% of lower leaves have yellowed. |
| Zone 6a | Start planting garlic cloves indoors September 10 – October 10, approximately 6 weeks before the first frost on April 19. | Transplant outdoors from October 10 – October 20 for best results. | Direct sowing is not advised; use garlic cloves for planting. | Harvest garlic from late July – mid-August, typically when 60–70% of the lower leaves have turned yellow. |
Garlic Planting Windows in Missouri
- Indoor start: Indoor planting should occur from September 1 to October 10, depending on your hardiness zone.
- Transplant outdoors: Outdoors, garlic should be transplanted between October 1 and October 20, based on your local frost dates.
- Harvest: Garlic in Missouri is typically harvested between late June and mid-August when most of the lower leaves are yellowing.
Common Mistakes Growing Garlic in Missouri
- Failing to plant garlic in time is a common misstep in Missouri, especially when spring weather can be unpredictable. Timing the planting before the first frost will help ensure healthy growth.
- Using smaller or damaged cloves can lead to a weak harvest. Always select the largest and healthiest cloves to plant, as they produce better bulbs the following year, especially in Missouri's varied climates.
- Not preparing the soil properly is a mistake many Mississippi gardeners make. Amend the soil with plenty of organic matter to improve texture and drainage, essential for successful garlic cultivation.
- Many novice gardeners in Missouri overlook the importance of garlic scapes. These flower stalks should be harvested when they curl, as leaving them on can reduce bulb size by redirecting the plant's energy.
- Planting garlic too deep can hinder growth. Ideally, garlic cloves should be planted about two inches deep, allowing them enough space to sprout while still being close to the surface for adequate nutrition.
Frequently Asked Questions
What if I'm in a cold pocket of Missouri?
If you find yourself in a colder area, consider starting your garlic earlier indoors to give the plants a head start. Plant outside after the last frost date to ensure optimal growth.
Can I still plant garlic in May?
Planting garlic in May is not ideal, as it needs a cold period for proper growth. This may result in smaller bulbs and diminished flavor, so stick to early fall planting whenever possible.
How deep should I plant garlic?
Garlic should be planted about two inches deep. This depth allows for proper rooting while protecting the cloves from temperature fluctuations during winter.
How often should I water garlic?
Water garlic moderately, aiming to keep the soil moist but not soggy. Increase watering during dry spells and reduce it as the harvest approaches to prevent bulb rot.
Will garlic grow well in Missouri's clay soil?
Garlic can grow in Missouri's clay soil with proper amendments. Improve drainage and aeration by incorporating organic matter or compost to ensure healthy growth and yield.
Keep Learning
City guides in Missouri
Other crops in Missouri
Typical fall sowing window for Garlic in Missouri: October 19 – November 9.