Tomato Marglobe (Solanum lycopersicum) is a determinate, open-pollinated heirloom variety renowned for its disease resistance, vigorous growth, and flavorful, smooth, round fruits. It produces medium to large, deep red tomatoes, ideal for slicing, canning, and sauces. Marglobe thrives in diverse climates and is a reliable choice for both home gardens and commercial growing.

How to Grow Marglobe Tomato

Sowing:
Start seeds indoors 6–8 weeks before the last frost date. Sow seeds 1/4 inch deep and 1 inch apart in seed-starting trays. Maintain a temperature of 70–75°F for germination, which typically takes 7–14 days. Transplant seedlings into individual pots when the first true leaves appear, burying the stem up to the lowest set of leaves to encourage strong root development.

Transplanting:
Harden off seedlings by gradually exposing them to outdoor conditions for 7–10 days. Transplant them into the garden after all danger of frost has passed and when night temperatures consistently stay above 50°F.

Plant Spacing:
Space plants 18–24 inches apart in rows 36–48 inches apart. For optimal growth, use supports such as cages or stakes, even for determinate varieties, to prevent fruits from touching the ground.

Soil Requirements:
Marglobe tomatoes thrive in slightly acidic to neutral soil with a pH of 6.0–6.8. Ensure the soil is well-drained and enriched with compost or organic matter.

Sunlight:
Provide full sun with at least 6–8 hours of direct sunlight daily for best fruit production.

Growing Marglobe Tomato

Watering:
Water deeply and consistently, about 1–2 inches per week, depending on weather conditions. Avoid overhead watering to reduce the risk of fungal diseases. Mulch around the plants to retain soil moisture and regulate temperature.

Fertilizing:
Apply a balanced fertilizer (such as 10-10-10) at planting time. Once the plants begin to flower, switch to a fertilizer higher in phosphorus and potassium to support fruit development.

Pruning:
Remove any suckers (side shoots) that appear in the leaf axils to direct energy toward fruit production. While pruning is not strictly necessary for determinate varieties, light pruning can improve air circulation and reduce the risk of diseases.

Pest and Disease Management:
Marglobe is resistant to fusarium wilt and verticillium wilt, but it’s essential to rotate crops annually to prevent soil-borne diseases. Monitor for common tomato pests like aphids, hornworms, and whiteflies. Use neem oil or insecticidal soap as needed.

Fast Facts

• Latin Name: Solanum lycopersicum
• Type: Open-Pollinated, Heirloom, Determinate, Warm Season
• USDA Zones: 3–12
• Days to Germination: 7–14 days
• Days to Maturity: 70–85 days
• Height: 36–48 inches
• Planting Method: From Transplant
• Sunlight: Full Sun
• Color: Deep Red

How and When to Harvest Marglobe Tomato

Harvest Marglobe tomatoes when the fruits are fully red and firm but slightly yielding to the touch. Cut or gently twist the fruit from the vine to avoid damaging the plant. Regular harvesting encourages further fruit production. Harvest all fruits before the first frost. Green tomatoes can ripen indoors if kept in a warm, dry place out of direct sunlight.

Marglobe Tomato Seed Saving

Choose fully ripe, healthy tomatoes for seed saving. Cut the fruits in half horizontally and scoop out the seeds and gel into a container. Let the mixture ferment for 2–3 days, stirring daily, to remove the gelatinous seed coating. Rinse the seeds thoroughly under running water, then spread them out on a paper towel or mesh screen to dry. Store the dried seeds in a cool, dark place for up to 4 years.

Marglobe tomatoes are a resilient and productive choice for any gardener. Their excellent flavor, versatility, and disease resistance make them a favorite for fresh eating and preserving. With proper care, you can enjoy a bountiful harvest of these classic tomatoes!