Big Rainbow is an heirloom tomato with great color, flavor, and size. Reaching sizes up to 4.5" in diameter and weighing up to 24 Oz, this tomato is orange with red markings and can exhibit cracking. It is loaded with delicious old-fashioned tomato flavor and matures in 90 days. Indeterminate.
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How to Grow Big Rainbow Heirloom Tomatoes from Seed
# 1 | Start tomatoes indoors 6-8 weeks before the last frost of spring, sow your Big Rainbow Heirloom Tomatoes seeds in a flat 1/4" deep and 1" apart. Keep the temperature near 70-75 degrees F until germination. Make sure you provide bright light but not direct sun. Keep the planting soil moist, but make sure drainage is adequate.
# 2 | Your Big Rainbow Heirloom Tomato seeds will germinate in 10-20 days. When the second set of leaves emerge, transplant your Big Rainbow Heirloom Tomato seedlings into individual pots; bury the stems up to the lowest set of leaves to make sure your tomatoes grow strong roots.
# 3 | A week before planting your Big Rainbow Heirloom Tomato seedlings outside, begin exposing them to the weather during the day to harden them off. Tomatoes cannot endure cold weather, so make sure you do not transplant outside until all threat of frost has passed.
# 4 | When the soil temperature reaches at least 70 degrees F, plant the seedlings in full sun and very rich soil; once more, bury the entire stem up to the lowest set of leaves. If providing a trellis, space the plants 2' apart, but if allowing the vines to spread, space the plants 3-4' apart.
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