🧰 Problem solverZones4 min read
When to plant garlic in zones 6 to 7, read from your frost date
Quick answer
In zones 6 to 7, extension pages put fall garlic in October. Kentucky says October, Illinois and the Mid-Atlantic guide say mid-October, and Maryland says mid to late October. That's close to the typical first fall frost at nearby NOAA stations, such as October 26 at State College, Pennsylvania. If your first frost comes early, plant toward the start of the window. If it comes late, you can go later: the Mid-Atlantic guide allows up to 10 days earlier in cool areas and up to 3 weeks later in warm ones.
Source: University of Kentucky Extension, October is garlic planting time, checked October 8, 2026; Illinois Extension, Garden Scoop: fall garlic planting, checked October 8, 2026; Mid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, checked October 8, 2026; University of Maryland Extension, Garlic, checked October 8, 2026; NOAA 1991-2020 U.S. Climate Normals, annual/seasonal, checked October 7, 2026.
The goal
The goal is roots before the cold
Fall garlic doesn't have to go in before the first frost. Illinois Extension says mid-October gives cloves time to root and start to sprout before freezing temperatures set in. Maryland says mid to late October, so cloves can grow roots and a few leaves before cold weather. Both pages time planting against cold weather setting in.
Source: Illinois Extension, Garden Scoop: fall garlic planting, checked October 8, 2026; University of Maryland Extension, Garlic, checked October 8, 2026.
That's why the advice for zones 6 to 7 clusters in October even though the first frost in these places usually comes in the second half of that month. The planting window and the first frost overlap.
Source: NOAA 1991-2020 U.S. Climate Normals, annual/seasonal, checked October 7, 2026.
| Extension source | Wording | Nearby station (zone) | 1 in 10 first frost | Typical first frost |
|---|---|---|---|---|
| Kentucky | October | Lexington airport (7a) | October 16 | October 28 |
| Illinois | mid-October | Champaign (6a) | October 11 | October 24 |
| Mid-Atlantic guide | mid-October in central Pennsylvania | State College (6b) | October 10 | October 26 |
| Maryland | mid to late October | Beltsville, for College Park (7b) | October 16 | November 1 |
Frost dates are NOAA 1991 to 2020 normals for the station nearest each zip code. The 1 in 10 date is the early edge: about 1 fall in 10 freezes before it.
Source: University of Kentucky Extension, October is garlic planting time, checked October 8, 2026; Illinois Extension, Garden Scoop: fall garlic planting, checked October 8, 2026; Mid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, checked October 8, 2026; University of Maryland Extension, Garlic, checked October 8, 2026; NOAA 1991-2020 U.S. Climate Normals, annual/seasonal, checked October 7, 2026; NOAA 1991-2020 annual/seasonal normals documentation, checked October 7, 2026; PRISM 2023 USDA hardiness zone GIS datasets and zip-code listing, checked October 6, 2026.
- Mid-OctoberIllinois and the Mid-Atlantic guide's planting timeIllinois Extension, Garden Scoop: fall garlic planting, October 8, 2026
- 10 daysearlier in cool, short-season areasMid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, October 8, 2026
- 3 weekslater in warm, long-season areasMid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, October 8, 2026
- Oct 26typical first fall frost, State College stationNOAA 1991-2020 U.S. Climate Normals, annual/seasonal, October 7, 2026
Your yard
Set your planting week from your frost date
The Mid-Atlantic commercial guide has a rule you can adapt to your own yard: mid-October in central Pennsylvania, up to 10 days earlier in cool, short-season areas, and up to 3 weeks later in warm, long-season ones. Your frost dates tell you which of those you are.
Source: Mid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, checked October 8, 2026.
Look up your first fall frost
Type your zip code into the frost date lookup and write down the typical first fall frost and the 1 in 10 earlier date.
Source: NOAA 1991-2020 U.S. Climate Normals, annual/seasonal, checked October 7, 2026.
Compare it with State College
State College's typical first fall frost is October 26. Our rule of thumb: if yours comes a week or more earlier, you're in the cooler, shorter-season group; a week or more later puts you in the warmer group.
Source: NOAA 1991-2020 U.S. Climate Normals, annual/seasonal, checked October 7, 2026.
Shift from mid-October
Cooler: plant up to 10 days before mid-October. Warmer: you can plant up to 3 weeks after. In between: mid-October.
Source: Mid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, checked October 8, 2026.
Check your state's extension page
If your state's extension service gives a window, go by it. The four in the table above all fall in October.
Mulch once the cloves are in
Kentucky suggests shredded leaves or straw on top. Iowa State uses a 4 to 6 inch layer of straw and moves it between the rows in early spring.
Source: University of Kentucky Extension, October is garlic planting time, checked October 8, 2026; Iowa State Extension, When should I plant garlic?, checked October 8, 2026.
Edges of the band
Colder 6a yards, warmer 7b yards
Zones are about winter lows, not fall timing, so two yards in the same zone can have different frost dates. Pick your week from the frost date, not the zone label. Outside the band, other extension pages run wider: Iowa State says October to early November, and Utah State says late September to November.
Source: Iowa State Extension, When should I plant garlic?, checked October 8, 2026; USU Extension, How to Grow Garlic in Your Garden, checked October 8, 2026.
Print it, tick it off
My garlic planting week
Fill this in from the frost lookup in September, then plant to it.
- My station and its typical first fall frost
- Earlier, later or close to State College's date
- My planting week
- Backup week if the soil is too wet
- Clove count and heads from the calculator
- Mulch ready: straw or shredded leaves
- Date planted, written on the planting map
What people learn the second year
Tips and tricks
- Put the frost date on the calendar in September. Look it up before the seed garlic arrives, so the planting week is set and the bed is ready.
- Prep the bed a week ahead. Clear and loosen the bed before planting week. Then a dry afternoon in the window is all you need.
- Keep the straw on hand. Have the mulch next to the bed on planting day. Covering the cloves right away means one trip, not two.
- Low yard? Read the earliest station. If your garden sits in a dip or out in open country, read the earlier frost date among the three stations the lookup shows.
- Log the planting date. Write it on the planting map. Next June, the harvest date and the planting date together tell you if your timing worked.
Common questions
Questions
When should I plant garlic in zone 6?
Extension pages near zone 6 say October, mostly mid-October: Illinois says mid-October, and the Mid-Atlantic guide says mid-October in central Pennsylvania.
Source: Illinois Extension, Garden Scoop: fall garlic planting, checked October 8, 2026; Mid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, checked October 8, 2026.
When should I plant garlic in zone 7?
Kentucky Extension says October and Maryland Extension says mid to late October. Warmer, long-season spots can go a little later.
Source: University of Kentucky Extension, October is garlic planting time, checked October 8, 2026; University of Maryland Extension, Garlic, checked October 8, 2026; Mid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, checked October 8, 2026.
Should garlic go in before or after the first frost?
Around it. In zones 6 to 7 the extension planting time and the typical first frost fall in the same weeks. The aim is roots before the ground gets cold, not planting before the first frost.
Source: Illinois Extension, Garden Scoop: fall garlic planting, checked October 8, 2026; NOAA 1991-2020 U.S. Climate Normals, annual/seasonal, checked October 7, 2026.
Is it too late to plant garlic in November?
Not always. The Mid-Atlantic guide allows up to 3 weeks after mid-October in warm, long-season areas, and Iowa State's window runs to early November. In a cooler spot, aim for October next year.
Source: Mid-Atlantic Commercial Vegetable Production Recommendations, F. Garlic, checked October 8, 2026; Iowa State Extension, When should I plant garlic?, checked October 8, 2026.
When is fall-planted garlic harvested?
Kentucky Extension says usually in June of the next year.
Source: University of Kentucky Extension, October is garlic planting time, checked October 8, 2026.
The arithmetic, done for you
Tools for this job
- ❄️ LookupFrost date lookup by zip codeFind the typical last spring and first fall frost for your zip code from NOAA 1991 to 2020 station normals, with the 1 in 10 year dates and a printable card.Open the tool
- 🧄 CalculatorGarlic and bulb planting calculatorHow many garlic cloves or spring bulbs fit a bed or a row, how many heads to buy, and how deep to plant them, from extension spacing figures.Open the tool
Keep reading
More guides
🧰 Problem solverIt froze after the last frost date: how to read the oddsA last frost date is a coin flip, not a promise. How NOAA's 50% and 1 in 10 dates work, how to pick the right station, and which date to plan around.Read the guide 
🧰 Problem solverOne corner of the yard frosts first: find and fix a frost pocketFrost in the low corner but not by the house? Cold air drains downhill on still nights. How to find a frost pocket, open it up and plant around it.Read the guide 
📘 Know-howHow deep to mulch garlic in cold zones, and when to pull the mulch backExtension pages put 3 to 4 inches of straw or leaves on fall garlic. See how much a bed takes, and when to pull it back, move it or leave it in spring.Read the guide 
📘 Know-howHow many bulbs per square foot: tulips, daffodils and crocusTulips and daffodils at 6 inches apart come to 4 bulbs per square foot; crocus at 3 inches, 16. See the extension spacings and count a whole bed.Read the guide
Sources
- October is garlic planting time, University of Kentucky, Martin-Gatton College of Agriculture, Food and Environment (Cooperative Extension), published October 13, 2022. Checked October 8, 2026.
- Fall garlic planting (The Garden Scoop blog), University of Illinois Extension, published October 9, 2021. Checked October 8, 2026.
- F. Garlic (Mid-Atlantic Commercial Vegetable Production Recommendations), Mid-Atlantic Commercial Vegetable Production Recommendations (Penn State, Maryland, Delaware, Rutgers, Virginia Tech and partners), hosted by University of Maryland Extension. Checked October 8, 2026.
- Garlic, University of Maryland Extension, Home and Garden Information Center, published August 22, 2023. Checked October 8, 2026.
- U.S. Climate Normals (1991-2020), annual/seasonal normals by station, NOAA National Centers for Environmental Information (NCEI). Checked October 7, 2026.
- 1991-2020 U.S. Climate Normals documentation: Annual/Seasonal Normals, NOAA National Centers for Environmental Information (NCEI). Checked October 7, 2026.
- 2023 USDA Plant Hardiness Zone GIS Datasets, PRISM Group, Oregon State University (for USDA). Checked October 6, 2026.
- When should I plant garlic?, Iowa State University Extension and Outreach, Yard and Garden, published July 24, 2024. Checked October 8, 2026.
- How to Grow Garlic in Your Garden, Utah State University Extension. Checked October 8, 2026.
Planning guide, not a guarantee. See every source on the site on the sources page. Spotted an error? Tell us.