Planting Date Calculator: Find Your Best Time to Plant

🌱 Planting Date Calculator

Calculate your ideal planting windows based on frost dates, crop type, and growing zone

Quick Presets
📋 Enter Your Details
🌱 Your Planting Schedule & Material Estimate
🌿 Crop Planting Reference (Weeks Relative to Last Frost)
6–8
Tomatoes (Indoor Start Wks Before)
8–10
Peppers (Indoor Start Wks Before)
4–6
Broccoli (Indoor Start Wks Before)
3–4
Cucumbers (Indoor Start Wks Before)
2–4
Lettuce (Wks Before Direct Sow)
4–6
Peas (Wks Before Direct Sow)
1–2
Beans (Wks After Direct Sow)
2–3
Squash (Wks After Direct Sow)
📊 Indoor Start & Transplant Timing
CropStart Indoors (Wks Before Last Frost)Transplant (Relative to Last Frost)Min Soil Temp
Tomatoes6–8 weeksAfter last frost60°F / 16°C
Peppers8–10 weeks2 weeks after65°F / 18°C
Broccoli4–6 weeks2–4 weeks before40°F / 4°C
Cucumbers3–4 weeks1–2 weeks after60°F / 16°C
Watermelon3–4 weeks2 weeks after70°F / 21°C
Squash3–4 weeksAfter last frost60°F / 16°C
CornNot recommendedN/A60°F / 16°C
🌾 Direct Sow Timing
CropSow Outdoors (Relative to Last Frost)Seed DepthDays to Harvest
Lettuce2–4 weeks before0.25 in / 0.6 cm45–60 days
Peas4–6 weeks before1 in / 2.5 cm55–70 days
Spinach4–6 weeks before0.5 in / 1.3 cm37–45 days
Carrots2–3 weeks before0.25 in / 0.6 cm70–80 days
Beans1–2 weeks after1 in / 2.5 cm50–65 days
Squash1–2 weeks after1 in / 2.5 cm50–65 days
Corn1–2 weeks after1.5 in / 3.8 cm60–100 days
Cucumbers1–2 weeks after0.5 in / 1.3 cm50–70 days
📐 Soil/Amendment Coverage by Depth
DepthSq Ft per Cu YdSq M per Cu MCommon Use
1 in / 2.5 cm324 sq ft40 m²Seed starting topdress
2 in / 5 cm162 sq ft20 m²Light mulch or amendment
3 in / 7.6 cm108 sq ft13.3 m²Standard garden bed
4 in / 10 cm81 sq ft10 m²New bed preparation
6 in / 15 cm54 sq ft6.7 m²Raised bed partial fill
12 in / 30 cm27 sq ft3.3 m²Deep raised bed fill
🛒 Bags vs Bulk Conversion
Bag SizeVolume per BagBags per Cubic YardCoverage at 3 in Depth
1 cu ft bag0.037 cu yd27 bags4 sq ft
1.5 cu ft bag0.056 cu yd18 bags6 sq ft
2 cu ft bag0.074 cu yd13.5 bags8 sq ft
3 cu ft bag0.111 cu yd9 bags12 sq ft
🏡 Common Garden Bed Sizes
Bed SizeAreaCu Yds at 3 in2 cu ft Bags Needed
4 x 4 ft raised bed16 sq ft0.15 cu yd2 bags
4 x 8 ft raised bed32 sq ft0.30 cu yd4 bags
4 x 12 ft raised bed48 sq ft0.44 cu yd6 bags
10 x 10 ft garden plot100 sq ft0.93 cu yd13 bags
10 x 20 ft garden plot200 sq ft1.85 cu yd25 bags
20 x 30 ft garden plot600 sq ft5.56 cu yd75 bags
25 x 40 ft large garden1000 sq ft9.26 cu yd125 bags
💡 Tip: Count Back from First Frost for Fall Crops
To calculate fall planting dates, take your first fall frost date and subtract the crop's days to maturity plus 14 days as a buffer. For example, if your first frost is October 15 and broccoli takes 80 days, start counting back 94 days to get a July 13 planting date.
💡 Tip: Soil Temperature Matters More Than Air Temperature
Seeds germinate based on soil temperature, not air temperature. Soil warms 2–4 weeks behind air temps in spring. Use a soil thermometer at 2–4 inch depth to confirm planting readiness. Most warm-season crops need soil at 60°F (16°C) or higher for reliable germination.

Get the last cool date for your region when you plant can do or destroy your whole garden season. It ranks between those basic causes that stands beside the temperature, miss it and you risk everything yearly. Cold nights and sudden cold?

They will destroy young plants before you notice what happened. Each who grows vegetables or fruits too well know that feeling.

Know Your Last Frost Date

The wise step is check the date of the last cold in your area first. That date shows you have roughly equal chance, half of the yearly colds come before it, half after it. Many folks prefer to wait one or two weeks after that standard date before putting anything in the ground, although follow the weather forecast always helps.

When temperatures repeatedly drop you would want to add a bit of protection. Packets for seeds help a lot here. They point exactly how many weeks before the last cold you should start seeds inside, and whether seeding directly or transplanting would happen in front or after those cool data.

Online plant calendars are practical resources. Type in your zip code in something like the plant calendar of the Old Farmer’s Almanac and you receive suggested data for everything, from vegetables and fruits to grasses, fitted to your place. Some of them even send emails about expected frost periods and when to start with seeds.

There are also calculators for colds that go around, where you put your date of the first frost-free period in spring and receive suggested time ranges for seeding and transplanting different crops.

Geography seriously matters hear. In one same district you could find four different zones of hardiness with around 30 days between their planting times. Microclimates add change…

Southeast slopes warm more soon, while northeast stay cool more long. In some places one does not touch potatoes until April arrives, and tomatoes, peppers or corn does not enter until mid-May at earliest. Even then, the last cold can come surprisingly and create troubles.

Beans interest because earlier planting times usually give bigger amounts. Growers try seeding early so that the plants receive more sunshine. Using types that mature late helps, because they commonly give richer harvests.

Before they usually spread crops through the season. Currently many growers want to lay everything in the soil during one short period. Even so, sometimes later crops beat the early, depending on your place.

Different crops do well in various seasons. Squash, carrots, beans and eggplants like summer heat. Winter brings garlic, peas and asparagus in its time.

The best spring period works for broccoli, radishes, onions, lettuce and cauliflower. Warm beds heat the ground more quickly, while common covers protect plants against overnight cold and pests at the same time. Late summer or early autumn is the mainstreamoption for working the soil and mixing compost or other organic material, to prepare you before the temperature drops.

Planting Date Calculator: Find Your Best Time to Plant

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