TENDCAL
When to sow, plant & harvest.
Pick your USDA zone and your crops — TendCal computes your sowing, transplant and harvest dates from real frost-date math. This week's garden tasks, at a glance.
This Week view
Every garden task that's due, sorted by date.
Per-crop timeline
Sow indoors → plant out → first harvest.
Real frost-date math
Average frost dates for USDA zones 3-10.
12 core crops
Extension-guide timing built in.
Cold-hardy aware
Frost-tolerant crops get their extended fall window.
Works offline
Plan at the garden bed — no signal needed.