How to prevent cracks:
- Plant crack-resistant tomato varieties that have elastic skin, including Jet Star, Early Girl, Earl of Edgecombe, Heinz 1350, Juliet, Daybreak, Valley Girl, Mountain Pride, and Mountain Delight.
- Don’t over-fertilize : Excess nutrients can cause a growth spurt. Tomatoes can have a hard time compensating and may crack.
- Mulch the plants (wait until they’re established – about 3-5 weeks after planting) to help retain moisture in the soil.
- Keep water supply even throughout the season. While you can’t control the weather conditions, you can make sure that plants are on a regular watering schedule.