How to Grow Roma Tomato 'Big Mama'

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Roma Tomato 'Big Mama'

Solanum lycopersicum 'Big Mama'

vegetable

Big Mama is a determinate paste tomato variety known for producing large, meaty Roma-type fruits with few seeds and thick flesh, ideal for sauces and canning. It's a vigorous, compact plant that produces heavy yields of uniform, blocky tomatoes. This cultivar combines the classic Roma form with exceptional size and flavor.

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

Plant Roma Tomato 'Big Mama'
Around Apr 17

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

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

≈ 75 days after planting

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

Growing Conditions

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Sun: Full sun, 6-8 hours daily minimum; 8+ hours recommended for best yields

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Water: Consistent, deep watering of 1-1.5 inches per week; keep soil evenly moist but not waterlogged; water at soil level to prevent fungal diseases

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Spacing: 24 inches

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Days to maturity: 75-85 days from transplant

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Planting depth: Seeds 0.25 inches deep; transplants buried up to first true leaves to encourage stronger root development

Soil

Type: Well-draining loamy soil rich in organic matter

pH: 6.0-6.8

Amendments:

Compost or aged manure Calcium source (crushed eggshells or lime) to prevent blossom end rot Balanced slow-release fertilizer

Growing Zones

Find your zone →

Thrives in zones 5-9; can be grown as annual in zones 3-4 with season extension

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

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Growth Stages

Seedling

3-4 weeks

Tiny plants with cotyledons and first true leaves appearing

Start indoors 6-8 weeks before last spring frost; provide bright light and maintain 70-75°F soil temperature; thin seedlings to 2-3 inches apart

Vegetative Growth

2-3 weeks after transplanting

Stocky plant developing 4-6 sets of true leaves and strong stem; dark green foliage establishes

Harden off transplants over 7-10 days; plant outdoors after last frost date; stake or cage early; remove bottom leaves once plant is established

Flowering

3-4 weeks

Small yellow flowers appear in clusters along the main stem; plant continues to grow but begins to slow vegetative growth

Maintain consistent watering; apply balanced fertilizer monthly; ensure full sun exposure; avoid over-nitrogen fertilizers which reduce flowering

Fruit Development

4-5 weeks

Flower clusters develop into golf-ball to egg-sized green tomatoes; large blocky Roma-type fruits form and enlarge rapidly

Water deeply and consistently; mulch around base; support heavy fruit clusters with stakes or cages; fertilize with lower-nitrogen, higher-potassium formula; prune suckers on determinate varieties sparingly

Ripening & Harvest

2-3 weeks per harvest cycle; continues until frost

Fruits mature from green to light pink to fully red; thick-walled, meaty texture becomes apparent; plant focus shifts from growth to fruit ripening

Continue consistent watering to prevent cracking; harvest when fully red but still slightly firm; remove ripening fruits weekly; as season ends and disease pressure increases, harvest mature green tomatoes to ripen indoors

Companion Planting

Plan your garden →

Plant with:

Basil Parsley Marigold Nasturtium Carrot Onion Borage Chives

Avoid planting near:

Brassicas (cabbage, broccoli, cauliflower) Fennel Potatoes Walnut trees

Common Pests

Hand-pick larvae; encourage parasitic wasps; use Bacillus thuringiensis (Bt) spray if infestation is severe
Spray insecticidal soap; use yellow sticky traps; encourage natural predators like ladybugs; reflective mulch can deter
Increase humidity; spray with water jets; use neem oil; remove heavily infested leaves
Remove lower leaves and diseased foliage promptly; provide good air circulation; water at soil level; apply fungicide (copper or sulfur) if needed; avoid handling wet plants
Maintain consistent soil moisture; ensure adequate calcium in soil; mulch to regulate moisture; avoid over-fertilizing with nitrogen

Uses

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Sauce & Paste Production

Culinary

With its low water content, meaty flesh, and few seeds, Big Mama is ideal for making marinara, tomato paste, and canned sauces. The thick, concentrated flavor concentrates further during cooking. [source]

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Fresh Eating & Salads

Culinary

Despite being a paste type, Big Mama's larger size and mild sweetness make it suitable for fresh slicing, though the thick flesh is more appreciated cooked than raw. [source]

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Canning & Food Preservation

Household

The dense flesh and low water content make Big Mama excellent for whole peeled tomatoes, sauce, and juice canning without long cooking times, reducing the chance of over-processing. [source]

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Pizza & Italian Cooking

Culinary

Large, blocky fruits provide substantial slices or can be crushed into traditional Italian pizza sauce; the meaty texture resists becoming watery during cooking. [source]

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Antioxidant-Rich Nutrition

Medicinal

Tomatoes are high in lycopene and vitamin C, compounds linked to heart health and cancer prevention. The concentrated flavor of Big Mama suggests high phytonutrient content. [source]

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

Harvest Tips

Pick tomatoes when fully red and slightly soft to the touch; twist gently or use pruning shears to avoid damaging vines. For best flavor, harvest in mid-morning after dew dries. As frost approaches, pick mature green tomatoes and ripen indoors at 68-72°F; they will fully ripen in 2-3 weeks. Big Mama's thick flesh makes it excellent for immediate processing into sauce.

Fun Facts

🌱 Big Mama is a determinate (bush) type, meaning it sets most of its fruit in a concentrated window rather than continuously, making it perfect for harvest planning and large-batch canning operations.
🌱 The blocky, uniform shape and meaty interior of paste tomatoes like Big Mama come from selective breeding favoring thick-walled structures with fewer, larger seed cavities compared to slicing tomatoes.
🌱 Tomato plants are technically vines, and their indeterminate/determinate growth pattern is genetically controlled; determinate varieties like Big Mama were developed to suit mechanical harvesting and home gardeners seeking tidier, more manageable plants.

Gardening Terms

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

Cultivar Full Sun Last Frost Date Mulch Sucker Transplant True Leaves

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