When to Plant Beefsteak Tomato in Gilmanton Iron Works, New Hampshire (03837)

Location

Gilmanton Iron Works, New Hampshire

ZIP Code

03837

USDA Zone

Last Frost

Saturday, April 25, 2026

📅 Planting Calendar

Start Seeds Indoors Saturday, March 14, 2026

Transplant Outdoors Saturday, May 9, 2026

Pro Tip: Start Beefsteak Tomato seeds indoors 6 weeks before your last frost date for best results.

🌿 Plant Details

Scientific Name Solanum lycopersicum

Days to Maturity 85 days

Mature Height 60-96"

Spread 36"

Type Indeterminate

Fruit Size Large (10-16 oz)

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

36" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 7-14 days

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Growing Beefsteak Tomato in Zone 5b

Beefsteak Tomato (Solanum lycopersicum) is a popular garden vegetable. In Gilmanton Iron Works, New Hampshire, which is in USDA Hardiness Zone 5b, you should start seeds indoors around Saturday, March 14, 2026.

Your average last frost date is Saturday, April 25, 2026. Plan to transplant your Beefsteak Tomato seedlings outdoors around Saturday, May 9, 2026, about 2 weeks after your last frost date.