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How to Grow Heirloom Tomato

Reviewed by MyLocalPlanting Editorial Team Updated Sources
Heirloom Tomato (Solanum lycopersicum)

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🌿 Plant Overview

Scientific Name Solanum lycopersicum
Category vegetable
Type Indeterminate
Days to Maturity 80 days
Starting Method Start Indoors

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Regular (1-2 inches/week)

↔️

Spacing

30" apart

🌱

Depth

0.25" deep

📏

Height

48-84"

🌱

Germination

5-10 days

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Common Heirloom Tomato Varieties

Popular cultivars to look for at your local nursery or seed supplier.

Brandywine

heirloom 80d

Large, pinkish-red heirloom prized for its complex, rich flavor — a benchmark for taste.

Cherokee Purple

heirloom 80d

Deep mahogany-purple with a smoky-sweet flavor profile and striking appearance.

Green Zebra

heirloom 78d

Striped green-yellow tomato with tangy, bright flavor — stays green when ripe.

Mortgage Lifter

heirloom 85d

Massive 2+ lb fruits bred by a backyard gardener in the 1930s; famously mild and sweet.

Aunt Ruby's German Green

heirloom 80d

Large green-when-ripe beefsteak with a complex, spicy-fruity flavor.

Days-to-maturity figures are approximate and vary by climate and growing conditions.

🌾 Seed Saving Guide

🟢 Easy
✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Let fruit ripen fully and slightly past peak on the vine before scooping seeds.

Processing

Scoop seeds into water, ferment 2–3 days, rinse well, dry flat on a non-stick surface for 1 week.

Seed Viability

Up to 4 years when stored cool, dark, and dry.

Pro Tip

Heirloom tomatoes are open-pollinated and grow true from seed. Separate varieties by 25 feet to prevent crossing.

Seed Storage Supplies

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Raised Bed Planting Guides

A 4×8 bed fits 5 plants of Heirloom Tomato. See plant counts, spacing grids, and companion pairings for every bed size →

Heirloom Tomato Planting Calendar by Zone

Heirloom Tomato Planting Calendar by State

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Frequently Asked Questions

When should I plant Heirloom Tomato? +

Start Heirloom Tomato seeds indoors 6 weeks before your last frost date, then transplant outdoors 2 weeks after the last frost. Use the search on this page to find exact dates for your ZIP code or city.

How long does Heirloom Tomato take to grow? +

Heirloom Tomato typically matures in about 80 days from planting. Exact timing varies by variety, soil conditions, and local climate.

Should I start Heirloom Tomato indoors or direct sow? +

Heirloom Tomato should be started indoors 6 weeks before the last frost date. This gives seedlings time to establish before being transplanted outside after frost danger has passed.

How much sun does Heirloom Tomato need? +

Heirloom Tomato requires full sun (6-8 hours) to thrive.

How far apart should I plant Heirloom Tomato? +

Space Heirloom Tomato plants 30 inches apart to allow adequate airflow and root development.

How much water does Heirloom Tomato need? +

Heirloom Tomato has regular (1-2 inches/week) water needs. Consistent moisture is important especially during germination and early growth.

Can you save seeds from Heirloom Tomato? +

Yes — seed saving difficulty for Heirloom Tomato is rated easy. Let fruit ripen fully and slightly past peak on the vine before scooping seeds. Scoop seeds into water, ferment 2–3 days, rinse well, dry flat on a non-stick surface for 1 week.

How long do Heirloom Tomato seeds last in storage? +

Properly dried and stored Heirloom Tomato seeds remain viable for up to 4 years. Store in a cool, dark, dry location in an airtight container with a silica gel packet for best results.

Are Heirloom Tomato seeds open-pollinated? +

Yes — Heirloom Tomato is open-pollinated, meaning seeds saved from your harvest will grow plants true to the parent variety. This makes it an excellent candidate for building a self-sustaining garden.

About Heirloom Tomato

Open-pollinated varieties passed down through generations, prized for complex flavor. More disease-susceptible than hybrids but unmatched taste. Save seeds for next year.

Expect your Heirloom Tomato to be ready for harvest in approximately 80 days from planting.

Use the search above or browse by zone or state to find the perfect planting dates for your location.