PLANTOMETRY

Seed Starting Calculator

Know exactly when to start seeds

Pick a crop and your key date. Plantometry counts back from frost or your transplant date to tell you when to sow indoors, when to move plants out, and when direct sowing is an option.

Seed-starting timing is crop-specific, so a crop is required here.
The average last spring frost for your area. Look it up by ZIP if unsure.

Your sowing timeline

  1. Start seeds indoors

    Pumpkin isn't typically started indoors — it's usually direct sown. See below.

  2. Transplant / plant out
    August 9, 2026

    plant after frost when soil is warm; cultivar vine length strongly affects spacing

  3. Direct sow (alternative)
    August 9, 2026

    direct sow in warm soil after frost risk