Rio Fuego Tomato

Start seeds indoors six to eight weeks before your last spring frost date. Sow seeds one-quarter inch deep in seed-starting mix kept consistently moist and warm, ideally between 70 and 80 degrees Fahrenheit. Provide bright light (grow lights work well) and germination typically occurs within seven to ten days.

Transplant seedlings outdoors after the last frost date has passed and soil has warmed to at least 60 degrees Fahrenheit. Harden off seedlings over one to two weeks by gradually exposing them to outdoor conditions. Plant at 24-inch spacing with 36 inches between rows, burying the stem up to the first true leaves to encourage a stronger root system.

Harvest Rio Fiegos when they turn fully red and feel slightly soft to gentle pressure, typically 80 to 89 days after transplanting. Since these are paste tomatoes, you're not picking ripe fruit at the table; instead, wait until the bulk of your crop ripens within a narrow window, usually over two to three weeks. This concentrated harvest is actually an advantage for home processors, allowing you to process a large batch all at once. Twist gently at the stem or use pruners to avoid damaging the plant.

Rio Fuego's determinate growth habit means minimal pruning is necessary; the plant naturally reaches its mature height and concentrates energy into fruit production over a defined season. You can remove lower leaves once flowering begins to improve air circulation and reduce disease risk, but aggressive pruning will reduce your harvest. Avoid removing the growing tip, as this variety sets its fruit load early and doesn't respond well to heavy topping.