Beefsteak Tomato
Marbonne is an exclusive hybrid tomato that delivers superlative flavor and appearance in just 69 days from transplant. This indeterminate variety grows tall and vigorous, rewarding patient gardeners with weeks of abundant harvests throughout the season. With the right soil pH (6.0, 6.8) and consistent temperature management, Marbonne develops the kind of fruit that reminds you why homegrown tomatoes matter so much.
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Moderate
3-11
?in H x ?in W
Annual, Perennial
High
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What sets Marbonne apart is Johnny's Selected Seeds' emphasis on both superlative flavor and appearance, a rare combination that doesn't require compromise. As an F1 hybrid, it combines the reliability of intentional breeding with the vigor hybrid tomatoes are known for. The 69-day maturity from transplants means you'll be harvesting earlier than many indeterminates, while the indeterminate growth habit keeps production flowing into fall. This is a tomato bred for people who care about what they're eating, not just how much they're growing.
As a culinary tomato, Marbonne is grown for fresh eating where its superlative flavor can shine. The indeterminate growth habit and reliable production make it ideal for home gardeners who want consistent harvests for slicing, cooking, or preserving throughout the season.
Sow seeds about 5–6 weeks before your planned transplant date, planting them 1/4 inch deep in 20-row flats (20 seeds per row) or 200-cell trays (1 seed per cell), lightly covered. Keep the soil mix at 75–85°F with moderate moisture—seeds typically germinate in 5–7 days. Once the first true leaf appears, pot up to 50-cell trays or 4-inch pots depending on your transplant timing. Grow seedlings at a constant 60–70°F with complete fertilizer until they're hardened off. Critical timing note: don't start too early, as leggy, root-bound, or flowering transplants will stunt growth and reduce early production.
Harden off seedlings by gradually exposing them to outdoor conditions before moving them to the garden. Transplant once soil temperature is consistently warm and frost danger has passed. Space plants 24 inches apart with 48 inches between rows, ensuring adequate room for air circulation and eventual trellising.
Pick fruit when it reaches full color and yields slightly to gentle pressure. Marbonne will mature 69 days from transplant, and the indeterminate growth habit means you'll have successive ripening throughout the season rather than a single flush. Harvest regularly to encourage continued production.
For tall indeterminates like Marbonne, consider pruning once the vine outgrows a manageable height for harvesting. Remove lower leaves as the plant matures to improve air circulation and reduce disease pressure. Pruning suckers (the shoots that grow between the main stem and branches) on indeterminate varieties helps direct energy toward fruit production rather than excessive foliage.
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