Jiffy Square Peat Pot Handling Sheet: 3 x 3 Pots, Peat Pots: J.W. Jung Seed Company Growing Plants From Seed For Summer Pots & Containers Learning with Experts Choosing Large Outdoor Commercial Planters for Trees PureModern One of the most common questions I get is how much and how often to fertilize tomatoes. Tomatoes are heavy feeders, so consistent feeding makes a big difference in growth and yield.