When to Plant Grape Tomato in Box Elder, Montana (59521)
Location
Box Elder, Montana
ZIP Code
59521
USDA Zone
4a
Last Frost
Friday, May 15, 2026
📅 Planting Calendar
Start Seeds Indoors Friday, April 3, 2026
Transplant Outdoors Friday, May 29, 2026
Pro Tip: Start Grape Tomato seeds indoors 6 weeks before your last frost date for best results.
🌿 Plant Details
Scientific Name Solanum lycopersicum
Days to Maturity 65 days
☀️ Growing Requirements
☀️
Sun
Full Sun
💧
Water
Regular
Seeds typically germinate in 7-14 days
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Growing Grape Tomato in Zone 4a
Grape Tomato (Solanum lycopersicum) is a popular garden vegetable. In Box Elder, Montana, which is in USDA Hardiness Zone 4a, you should start seeds indoors around Friday, April 3, 2026.
Your average last frost date is Friday, May 15, 2026. Plan to transplant your Grape Tomato seedlings outdoors around Friday, May 29, 2026, about 2 weeks after your last frost date.