Italian Roma Tomato Seeds - Heirloom Italian Roma Tomato Seeds. 76 days. Open Polinated, verticillium and fusarium wilt resistant, Vigorous determinant vines. Excellent yields of bright red, medium-small, plum shaped fruits. Popular for cooking, canning, and paste. Sowing: Start Italian Roma tomatoes indoors 6-8 weeks before the last frost of spring, sowing the seeds in a flat 1/4" deep and 1" apart. Keep the temperature at 70-75 degrees F until germination, as well as providing adequate light in a sunny window or under a grow light; keep the soil moist, but make sure drainage is adequate. When the second set of leaves emerges, transplant the seedlings into individual pots; bury the stems up to the lowest set of leaves to grow strongly rooted plants. A week before planting the seedlings outside, begin exposing them to the weather during the day to harden them; tomatoes cannot endure cold weather, and should not be transplanted outside until all threat of frost has passed. 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. For companion planting benefits, plant these heirloom tomato seeds for sale with carrots or onions, but avoid planting them with cabbage or tomatoes.