When to Plant Mammoth in Zone 1a
Get the exact Zone 1a timeline for your Mammoth. See localized frost dates, indoor sowing windows, and optimal companions below.
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Crop Dates : 1a
Growing note: This crop establishes over multiple seasons (~55 days / ~1 year to first harvest). Plant on the frost schedule; first harvest follows establishment, not a single frost-free season.
| Milestone | Date |
|---|---|
| Start Indoors | May 18th |
| Last Frost | Jun 15th |
| Transplant / Sow Outdoors | Aug 3rd |
| Harvest Begins | Sep 27th |
| Harvest Ends | Jul 15th |
