SoilMoist is a granular polymer that retains over 200 times its weight in water, releasing it to your plants as they need it.  It’s great for helping ensure container plants stay hydrated in the hot summer, especially if you can’t water them every day.  For plants like tomatoes, it’s essential. Tomato plants need lots of water.  And if their soil alternates too often between dry and wet, the tomatoes will crack.  SoilMoist helps make sure that doesn’t happen. Simply mix it in to the soil. It lasts 3-5 years, and even comes in a version that includes a timed-release fertilizer, for super care-free gardening. You can buy it at many gardening centers and online gardening retailers.