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.

Default calendar jobs first

For the default Apr 15, 2027 last frost and Oct 15, 2027 first frost plan, show dated jobs before regional presets or manual frost-date fields.

Season runway

1 Feb 4, 2027 Start Tall Utah Celery indoors
2 Feb 4, 2027 Start Tall Maximum Snapdragon indoors
3 Feb 4, 2027 Start American Flag Leek indoors
4 Feb 4, 2027 Start Arp Rosemary indoors

Spring startApr 15, 2027
Next jobFeb 4, 2027 · Start Tall Utah Celery indoors
Fall stopOct 15, 2027 frost · last shown Feb 4, 2027

Start Tall Utah Celery indoors Feb 4, 2027 · Tall Utah Celery
Start Tall Maximum Snapdragon indoors Feb 4, 2027 · Tall Maximum Snapdragon
Start American Flag Leek indoors Feb 4, 2027 · American Flag Leek
Start Arp Rosemary indoors Feb 4, 2027 · Arp Rosemary

Example plan calculated October 9, 2026. Open the planner for dates recalculated for today.

Worked example

Turn a frost date into a radish sowing job

Illustrative spring 2027 plan · French Breakfast Radish · direct sowing

Example average last frost: Apr 15, 2027
Catalog sowing offset: 28 days before last frost
Packet maturity estimate: 28 days

Subtract 28 days from Apr 15, 2027: the example direct-sow job is Mar 18, 2027.
Check the bed before sowing. The packet allows sowing 4–6 weeks before average last frost when soil is above 40°F; its ideal soil range is 65–85°F.
Add the 28-day packet estimate to the sowing date: Apr 15, 2027 is a harvest estimate, not a guaranteed picking date.

April 15 is an illustrative frost date; enter your local average. Cold soil, weather and growing conditions can move germination and harvest; a USDA hardiness zone does not supply a frost date.

Next action

Enter your own last and first frost dates in the calendar, filter to the crops you intend to grow, and check soil conditions before acting on a dated job.

Set my calendar dates

Botanical Interests · French Breakfast Radish packet

Continue online: https://seedgardenexplorer.com/tools/planting-calendar#calendar-date-controls

Use your browser’s Print command for this example. Link to this example. Interactive print and copy controls appear when JavaScript is enabled.

Inputs

Regional dates first: Use source-backed regional presets before manually editing frost dates when a selected guide publishes exact dates.
Manual frost-date editing: Keep last-frost and first-frost fields available for gardeners with local records, microclimate notes, or no exact regional preset.
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.
Regional date preset: Hydrated calendar users can apply source-backed regional defaults when a guide publishes exact first and last frost dates.
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 date presets or guide crop rows to replace generic frost dates; 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

Answer-first regional pages

What can I plant right now? Days-to-maturity against the local average first frost, for the regions this catalog has verified windows for
What can I still plant in Texas right now? Still-plantable and already-too-late crops for Texas
What can I still plant in North Florida right now? Still-plantable and already-too-late crops for North Florida
What can I still plant in Central Maryland right now? Still-plantable and already-too-late crops for Central Maryland
What can I still plant in the New York City area right now? Still-plantable and already-too-late crops for New York City
What can I still plant in York County, Pennsylvania right now? Still-plantable and already-too-late crops for York County, PA

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