Planning tool

Planting Calendar Tool

Calculate indoor seed-starting, direct-sow, transplant, fall sowing, succession, and harvest windows from local frost dates and catalog timing data.

Inputs

Last frost date

Anchors indoor starts, direct sowing, transplant windows, and warm-season timing.

First frost date

Anchors fall planting windows and late-season crop risk.

Seed catalog filters

Limits the calendar to the crops, herbs, flowers, cover crops, or natives in the current plan.

What it returns

• Seed-starting tasks with weeks-before-frost timing.
• Direct-sow and transplant task dates for matching catalog entries.
• Fall planting tasks and harvest estimates where catalog data supports them.

Regional frost-date fallback

• Regional Planting Guides Use regional guides to replace default frost dates with local extension timing; 111 source-backed regional guides cover All 50 U.S. states.
• USDA Zone and Frost-Date Planner Keep hardiness zones separate from first-frost and last-frost calendar inputs

Calendar-ready seed paths

• Full Seed Catalog 103 source-backed varieties
• Fall Planting Planner 63 first-frost-window varieties
• Succession Sowing Planner 44 repeat-sowing varieties
• Quick Harvest Garden Planner 34 60-day-or-faster varieties
• Direct Sow Garden Planner 85 direct-sow-capable varieties
• Seed-Starting Planner 50 indoor-start varieties
• Cool Season Garden Planner 38 cool-season varieties
• Cool Season Seeds Early spring and fall candidates
• Warm Season Garden Planner 55 warm-season varieties
• Warm Season Seeds Frost-sensitive summer crops
• Vegetable Garden Planner 44 vegetable varieties
• Herb Garden Planner 16 herb varieties
• Flower Garden Planner 18 flower varieties
• Native Plant Garden Planner 14 native varieties
• Cover Crop Garden Planner 11 cover crop varieties
• Succession Sowing Seeds 44 repeat-sowing varieties
• Fall-Planting Seeds 63 first-frost-window varieties

Fast succession examples

• French Breakfast Radish Repeat every 7 days
• Astro Arugula Repeat every 10 days
• Bloomsdale Spinach Repeat every 10 days
• Black Seeded Simpson Lettuce Repeat every 14 days
• Southern Giant Curled Mustard Repeat every 14 days
• White Stem Bok Choy Repeat every 14 days

Source basis

• UMN planting the vegetable garden Outdoor planting and frost-window reference
• CSU vegetable planting guide Crop timing and season-window reference
• UMN starting seeds indoors Indoor seed-starting timing reference