Burpee Big Boy Tomato

Start seeds indoors 6 to 8 weeks before your last spring frost. Sow seeds 1/4 inch deep in seed-starting mix kept at 70 to 75 degrees Fahrenheit. Germination typically occurs within 5 to 10 days. Provide bright light once seedlings emerge, maintaining soil moisture but avoiding waterlogging.

Transplant seedlings outdoors after the last frost date when soil has warmed to at least 60 degrees Fahrenheit. Harden off seedlings over 7 to 10 days by gradually exposing them to outdoor conditions. Bury the transplant deeper than it grew in its container, up to the lowest true leaves, to encourage a stronger root system. Space plants 24 inches apart.

Harvest when fruits reach full size and develop a deep, glossy scarlet color. Fully ripe fruits will yield slightly to gentle pressure but should still feel firm. Expect fruits to weigh around one pound at maturity. Harvest is typically 70 to 79 days from transplanting. Twist gently to detach fruit from the vine, or use pruning shears to avoid damaging branches. For the best flavor, harvest in early morning and allow fruit to reach full color on the vine rather than ripening indoors.

As an indeterminate variety that grows tall and vigorously, Big Boy benefits from selective pruning to manage its vigor and improve fruit quality. Prune suckers (shoots that emerge between the main stem and branches) to direct energy into main stems and fruit production. Remove lower leaves as the plant grows to improve air circulation and reduce disease susceptibility, especially as fruit begins to set.