What to do in the garden in September
January February March April May June July August September October November December
Zone 1
❄️ Zone 1 · Min −51 °C · Northern Alaska, Yakutsk, Siberian far north. Almost no outdoor growing season.
- 🍂 Hard frost likely — harvest all remaining crops
- 🛡 Mulch perennial beds heavily before freeze
- 🔧 Clean and store tools; drain all hoses
- 🌾 Cover crops should be established by now
Zone 2
🥶 Zone 2 · Min −45 °C · Interior Alaska, Northern Canada, Norilsk.
- 🥕 Final harvest: carrots, beets, potatoes
- 🧄 Plant garlic before ground freezes
- 🌾 Ensure all cleared beds have cover crop
- 🛡 Mulch garlic beds and perennials
Zone 3
🌨 Zone 3 · Min −40 °C · Winnipeg, Northern Minnesota, Surgut. Very short season (90–120 days).
- 🥕 Harvest carrots, beets, potatoes before frost
- 🧄 Plant garlic — key task this month
- 🌾 Sow cover crops in all cleared beds
- 🛡 Mulch garlic and perennial beds
Zone 4
🌧 Zone 4 · Min −34 °C · Minneapolis, Calgary, Novosibirsk, Yekaterinburg. Season ≈ 140 days.
- 🥕 Harvest root crops; dig potatoes
- 🧄 Plant garlic (key priority this month)
- 🌾 Cover crop all empty beds with winter rye
- 🛡 Mulch garlic rows and perennial beds
Zone 5
🌥 Zone 5 · Min −29 °C · Chicago, Montreal, Moscow, Helsinki. Season ≈ 160 days.
- 🥕 Harvest root crops; dig potatoes
- 🧄 Plant garlic (highest priority this month)
- 🌾 Sow winter rye cover crop in cleared beds
- 🛡 Mulch strawberries and perennial herbs
Zone 6
⛅ Zone 6 · Min −23 °C · Denver, Toronto, Warsaw, Oslo, Kyiv. Season ≈ 180 days.
- 🥕 Harvest roots; dig potatoes and sweet potatoes
- 🧄 Plant garlic (top priority)
- 🌾 Sow winter rye in all cleared beds
- 🛡 Mulch perennial beds before cold
Zone 7
🌤 Zone 7 · Min −18 °C · New York, Berlin, Strasbourg, Grenoble, Seoul. Long season ≈ 200 days.
- 🥕 Harvest root crops; dig sweet potatoes
- 🧄 Plant garlic (top priority)
- 🌾 Sow winter rye or crimson clover cover crop
- 🌱 Direct sow spinach for late-fall harvest
Zone 8
☀️ Zone 8 · Min −12 °C · Seattle, Paris, Lyon, Toulouse, Lille, Amsterdam. Near year-round growing.
- 🥬 Excellent growing month — plant cool-season crops
- 🧄 Plant garlic (ideal timing this zone)
- 🌾 Sow crimson clover as fall/winter cover crop
- 🥕 Harvest sweet potatoes, root crops
Zone 9
🌞 Zone 9 · Min −7 °C · London, Bordeaux, Marseille, Nantes, Rome, Madrid. Year-round outdoor growing.
- 🥬 Excellent month — plant cool-season crops
- 🍅 Transplant fall tomatoes and peppers
- 🧄 Plant garlic — ideal timing
- 🌾 Sow crimson clover as fall cover crop
Zone 10
🌴 Zone 10 · Min −1 °C · Nice, Lisbon, Athens, Southern California, Southern Florida. Subtropical.
- 🥬 Excellent planting month — cool season begins
- 🍅 Transplant fall tomatoes and peppers
- 🧄 Plant garlic and spring bulbs
- 🌾 Sow winter cover crops in cleared beds
Zone 11
🌺 Zone 11 · Min +4 °C · Hawaii, Hong Kong, tropical coasts. True tropics, frost-free year-round.
- ☀️ Dry season begins — reduce irrigation gradually
- 🌴 Plant new perennials in ideal conditions
- 🌿 Sow cowpeas for dry season nitrogen
- 🏆 Harvest tropical roots and tubers
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