Top Outdoor Planters for Your Garden West Elm The Best Winter Containers From Outdoor Planters to Window Boxes Fine Gardening Tomato plants do not need more fertilizer. They need the right fertilizer at the right time. Too much nitrogen gives you leaves. Smart feeding gives you fruit. Save this guide before your Tomato plants growing in bottomless pots placed into a grow bag to increase volume of compost available to the plant. Solanum lycopersicum Stock Photo Alamy Iowa Fertilizer Company IFCo