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Tomato Seeds, Big Rainbow
Description
(Solanum lycopersicum). The fruit are huge, weighing up to 2 pounds, delicious and sweet tasting. These tomatoes are very striking sliced, as the yellow fruit has neon red streaking through the flesh. An heirloom preserved by members of Seed Savers Exchange.
- Indeterminate
- 85 days to maturity
- 6-8 hours of full sun
- Sprouts in 7-14 days
- Seed Depth: 1/8"
- Plant Spacing: 24"
- Ideal Temperature: 75-95 F
- Frost Hardy: No
Growing Tips, Tricks and FAQs
Growing Tips
Big Rainbow tomatoes grow best in full sun and nutrient-rich, well-draining soil. Use support such as cages or stakes to manage the plant's height and the weight of the large fruits. Regular pruning of suckers can help direct the plant's energy toward fruit production.
When to Grow
Start seeds indoors 6-10 weeks before the last expected frost date. Transplant seedlings outdoors after the danger of frost has passed and temperatures stay above 60 F. Check local frost date calendars to determine optimal planting times for your specific region or hardiness zone.
How to Sow and Plant
Sow seeds 1/8 inch deep in quality seed-starting mix, keeping the soil temperature between 70-80 F during germination. You can also use a heat mat to help keep the soil warm. Harden off seedlings by gradually exposing them to outdoor conditions over 7-10 days before transplanting them into the garden. Space plants about 24 inches apart.
How to Grow
Water consistently, keeping the soil evenly moist but not waterlogged. Fertilize with a balanced fertilizer or one formulated for tomatoes every 2-3 weeks during the growing season. Prune by removing suckers to direct energy toward fruit production and improve air circulation. Regularly monitor for pests and diseases.
How to Save
- Most tomatoes are self-pollinating and don't frequently cross; in a garden setting, separating by 25 feet should prevent 99% of cross-pollination. Or you can bag and hand pollinate for 100% purity.
- On a small scale, seeds may be scooped from the fruits and dried on a paper towel.
- For larger quantities or cleaner seeds, fermentation for a few days is recommended.
- Once dry, tomato seed can be stored in a cool, dry, dark place; good seed retains viability for 5 years or more.
FAQ
What makes Big Rainbow tomatoes different from other varieties?
Their large size, bi-colored appearance, and sweet, mild flavor distinguish them.
How long does it take for Big Rainbow tomatoes to mature?
Under ideal conditions, they are ready to harvest about 85 days from transplanting. The plants will continue providing a steady harvest throughout the season.
Do Big Rainbow tomatoes need support?
Yes, because of their indeterminate growth habit and large fruit size, support such as staking or caging is recommended.
More Questions?
Check out our "Tomatoes 101" blog post by staff horticulturist John Lenz.
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