Indeterminate
Indigo Rose is a breakthrough tomato that transforms from glossy black to deep purple-red as it ripens, making it the darkest tomato ever bred. Developed by Oregon State University in the early 2000s, this remarkable variety produces 1-2 ounce cocktail tomatoes with exceptional levels of anthocyanins, the same powerful antioxidants found in blueberries. Hardy across zones 2-11, these indeterminate plants reach 3-8 feet tall and deliver their unique harvest in about 80 days from transplant.

Photo © True Leaf Market(https://www.trueleafmarket.com/products/tomato-indigo-rose-seeds)
24-36 inches apart
Full Sun
Moderate
?-?
96in H x ?in W
Annual
High
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What sets Indigo Rose apart is its extraordinary purple-black skin that develops where fruits are exposed to direct sunlight, creating a stunning color gradient from dark purple tops to red bottoms when ripe. This compact indeterminate variety packs incredible antioxidant power into each small tomato while maintaining excellent disease resistance to eight major tomato ailments including Early Blight, Late Blight, and Fusarium Wilt. The cocktail-sized fruits offer a distinctive plummy flavor that's both scientifically fascinating and deliciously satisfying.
Indigo Rose excels as both a striking salad tomato and an eye-catching addition to fresh dishes where its unique purple-black appearance creates visual drama. The cocktail-sized fruits work beautifully in mixed tomato salads, garnishes, and as conversation-starting appetizers. Their compact size and distinctive plummy flavor make them perfect for specialty farmers' market sales and home gardeners seeking something truly unusual for their kitchen table.
Start seeds indoors 6-8 weeks before the last expected frost, planting 1/4 inch deep in quality seed-starting mix. Maintain soil temperature between 70-90°F for optimal germination, which typically occurs within 7-14 days. Keep soil moist but not soggy, and provide strong light or grow lights positioned a few inches above seedlings to prevent legginess.
Begin hardening off plants 1-2 weeks before transplanting by gradually exposing them to outdoor conditions, starting with 1-2 hours daily in partial shade. Transplant after all frost danger has passed, burying plants up to their first set of true leaves to encourage strong root development. Space plants 24 inches apart in sunny locations with well-amended soil.
Harvest when fruits transform from their initial glossy black color to deep purple-red, with the characteristic red coloring developing on the bottom while the sun-exposed portions maintain their dark purple hue. Pick fruits gently by twisting them off the stem or using clean pruners. The 1-2 ounce tomatoes are ready typically 75-80 days from transplant, and should be harvested when fully ripe for the best plummy flavor development.
While not strictly necessary due to their compact nature, removing lower leaves helps prevent soil-borne diseases and improves air circulation. Pinching out suckers that grow between the main stem and branches can encourage better fruit production, though this indeterminate variety is naturally more manageable than traditional sprawling types.
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“Indigo Rose emerged from the research labs of Oregon State University in the early 2000s as a groundbreaking achievement in tomato breeding. Scientists developed this variety specifically to maximize anthocyanin content, creating the darkest tomato the world had ever seen. The university's work represented years of dedicated research into breeding tomatoes with enhanced nutritional profiles, particularly focusing on these powerful antioxidant compounds that give the fruit its distinctive dark coloration.”