Sugar Plum Tomato

Start seeds indoors 6 to 8 weeks before your last spring frost date. Use a quality seed starting mix, keep temperatures between 70 and 80 degrees Fahrenheit, and provide bright light once seedlings emerge. Seeds typically germinate in 5 to 10 days under warm conditions.

Transplant outdoors once all danger of frost has passed and soil temperature reaches at least 60 degrees Fahrenheit, ideally warmer. Harden off seedlings by gradually exposing them to outdoor conditions over 7 to 10 days before final planting. Space plants 24 inches apart with 36 inches between rows, and plant deeply, burying the stem up to the first true leaves to encourage a strong root system.

Sugar Plum tomatoes are ready to harvest when they reach full deep red color and yield slightly to gentle pressure. Pick fruits when fully ripe for maximum sweetness, or harvest them just as they turn red and finish ripening indoors if you need to free up space for incoming fruit. The indeterminate growth habit means you'll be harvesting continuously throughout the season, typically from early summer through the first frost. Grasp the fruit gently and twist slightly to detach from the vine, or use pruning shears to avoid damaging the delicate stems.

As an indeterminate variety, Sugar Plum benefits from light pruning to manage its vigorous growth and improve air circulation. Pinch or remove lower leaves once the plant is established and flowering to reduce disease pressure and direct energy toward fruit production. Remove suckers (shoots that grow in the crotch between the main stem and branches) to focus the plant's energy into fewer, higher-quality fruiting stems, though Sugar Plum's prolific nature means you can be less aggressive than with larger-fruited indeterminate types.