How to Grow Roma Tomato

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Roma Tomato

Solanum lycopersicum 'Roma'

vegetable

Roma is a determinate paste tomato known for its oblong, meaty fruit with few seeds and thick walls—ideal for sauces, pastes, and canning. This classic Italian heirloom produces compact, bushy plants that typically reach 3-4 feet tall and are among the most reliable producers for home gardeners.

Looking for a specific variety?

Roma VF San Marzano Amish Paste Italian Heirloom Roma Gold Opalka

When should you plant Roma Tomato in your zone?

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Example Roma Tomato timeline · Pittsburgh, PA (Zone 6b)

Plant Roma Tomato
Around Apr 17

Near Pittsburgh's average last spring frost.
Tend & protect
Late spring–summer

Watering, feeding, and pest-watch reminders.
Harvest Roma Tomato
Around Jul 1

≈ 75 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Roma Tomato dates for your own zip code.

Growing Conditions

☀️

Sun: Full sun, minimum 6-8 hours daily; 8+ hours preferred for best fruit production

💧

Water: Consistent moisture; water deeply 1-2 inches per week. Keep soil evenly moist but not waterlogged. Water at soil level to avoid foliar diseases. More frequent watering needed in hot climates and containers.

📏

Spacing: 24 inches

📅

Days to maturity: 75-85 days from transplant to first ripe fruit

🌱

Planting depth: 0.25 inches for seeds; transplant 2/3 of stem depth (bury stem up to first true leaves) when moving to garden

Soil

Type: Well-draining, fertile loamy soil rich in organic matter

pH: 6.0-6.8

Amendments:

Compost Aged manure Balanced fertilizer (10-10-10) Calcium (crushed eggshells or lime) to prevent blossom end rot

Growing Zones

Find your zone →

Thrives in zones 3-10; grown as annual everywhere; prefers warm climates (65-85°F)

3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b

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Growth Stages

Seedling

3-4 weeks

Tiny cotyledons emerge; first true leaves appear after 10-14 days. Plants are delicate and pale green.

Keep soil moist but not soggy. Provide 14-16 hours of bright light daily (grow lights recommended). Maintain 70-75°F. Avoid damping off by ensuring good air circulation.

Vegetative

3-4 weeks indoors before garden transplant

Plant develops true leaves and a sturdy stem. Transplants grow to 4-6 inches tall with several sets of leaves.

Pot up to larger containers as needed. Harden off gradually before transplanting outdoors. Fertilize weekly with dilute balanced fertilizer. Maintain strong light and moderate watering.

Establishment & Growth

4-6 weeks

Plant establishes in garden; stems thicken, foliage expands rapidly. Plant reaches 2-3 feet tall and develops branching structure.

Install stakes or cages early (determinate types can be minimally pruned). Water deeply and consistently. Apply 2-3 inches of mulch. Side-dress with balanced fertilizer every 2-3 weeks. Remove lower leaves once plant is established to improve air circulation.

Flowering & Fruit Set

3-4 weeks

Yellow flowers appear in clusters. Flowers are self-pollinating. Small green fruit develops rapidly behind each flower cluster.

Maintain consistent watering—fluctuations cause blossom end rot and cracking. Switch to lower nitrogen, higher phosphorus fertilizer (5-10-10) to promote fruiting. Ensure good air circulation. Pinch off suckers on indeterminate varieties (though Roma is determinate).

Fruiting & Ripening

3-4 weeks to full ripeness

Fruits swell to full size (2-3 inches long) and color changes from green to orange-red as they mature. Plant may slow leafy growth as energy shifts to fruit.

Continue consistent watering. Avoid heavy nitrogen; maintain phosphorus/potassium. Fruit ripens best in 68-77°F; excessive heat (above 86°F) can slow ripening. Monitor for pests and diseases. Pick ripe fruit regularly to encourage continued production.

Companion Planting

Plan your garden →

Plant with:

Basil Carrot Onion Parsley Borage Marigold Nasturtium

Avoid planting near:

Brassicas (cabbage, broccoli, cauliflower) Fennel Dill Potato Walnut

Common Pests

Hand-pick larvae; spray with neem oil or spinosad; encourage parasitic wasps; apply Bt (Bacillus thuringiensis)
Use yellow sticky traps; spray neem oil or insecticidal soap; encourage natural predators like ladybugs; reflective mulch
Remove lower leaves; improve air circulation; mulch to prevent soil splash; fungicide (copper, sulfur, or chlorothalonil); plant resistant varieties
Remove infected leaves immediately; ensure good drainage and air circulation; fungicide application; avoid wetting foliage; practice crop rotation
Remove infected leaves; improve air circulation; fungicide (copper or sulfur); avoid overhead watering; stake and prune to open canopy
Maintain consistent soil moisture; add calcium (lime, gypsum, or crushed eggshells); mulch to regulate moisture; avoid high nitrogen fertilizers

Uses

🍳

Canning, Sauce & Paste

Culinary

Roma's meaty, low-seed flesh with thick walls makes it the gold standard for tomato sauce, paste, and canning. High solids content means less cooking time and reduced waste. [source]

🍳

Fresh Cooking & Salads

Culinary

Though a paste variety, fresh Romas are excellent in cooked dishes, stews, and warm salads due to their firm texture and balanced sweet-tart flavor. [source]

🏠

Food Preservation

Household

The dense flesh and low water content make Roma ideal for drying, freezing, and long-term storage in various forms (sauce, paste, dried whole). [source]

💊

Antioxidant Content

Medicinal

Tomatoes are rich in lycopene, a powerful antioxidant linked to reduced cancer risk and heart health benefits. Cooking increases bioavailability of lycopene. [source]

🎨

Home Gardening & Seed Saving

Craft

Roma is an heirloom variety with stable characteristics, making it excellent for beginning seed-savers. Open-pollinated and reliable fruit production. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Harvest when fruit is fully colored (deep red) and yields slightly to gentle pressure. Roma tomatoes can be picked at the 'breaker stage' (first blush of color) and ripened indoors at 68-75°F. For sauce-making, harvest at peak ripeness. Determinate varieties produce most fruit simultaneously, making them ideal for canning. Continue harvesting until frost or plants stop producing.

Fun Facts

🌱 Roma tomatoes were developed in Italy in the 1950s specifically for canning and processing, making them one of the most commercially important paste varieties worldwide.
🌱 The determinate (bush) growth habit of Roma means it flowers and fruits all at once rather than continuously—perfect for preserving harvests but less ideal for fresh eating throughout the season.
🌱 Roma tomatoes contain 3-5 times more solids than watery slicing varieties, which is why you'll get thicker, richer sauce with less cooking time and fuel costs.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Damping Off Full Sun Heirloom Mulch pH Sucker Transplant True Leaves

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