Seed & Season Frost Calendar: a free Claude skill

A small skill that turns your frost date into a seed-starting and planting calendar for up to 8 crops.

• Looks up your average last frost date
• Start indoors, transplant and direct sow dates
• Soil temperature checks built in

Made by Seed & Season, part of What If Labs.

Install it

1. Download seed-season-frost-calendar.zip (don’t unzip it).
2. In Claude on the web or desktop, open Customize, then Skills, click +, choose Upload a skill and pick the ZIP.
3. Make sure code execution is on in Settings, Capabilities. It works on any Claude plan, including the free one.
4. Ask Claude something in plain words. It picks the skill up on its own.

Using Claude Code instead? Copy this folder into ~/.claude/skills/.

Try a free tool first

No Claude needed: the Planting Calendar by Last Frost Date runs in your browser and shows its working.

Want the whole thing?

The Seed & Season Garden Planner is $15, one time, with a 14-day refund. Plan, plant, troubleshoot and record your whole garden.

• Planting calendar from your frost dates
• Bed layouts, spacing and plant counts
• Succession, relay and fall plantings
• Seed order sized to your harvest goal
• Plant problem diagnosis
• Weekly tasks, journal and harvest log
• Updates for a year

License

MIT. Use it, change it, share it. Please keep the credit to Seed & Season.