All good advice, also, if you mulch under your plants, when it rains or you water, it keeps the dirt from splashing up. the combination of soil and water can help promote several tomato diseases. Cut off any stem growing straight down, or those that appear flimsy. All they do is rob the better part of the plant of needed nutrients. I like seaweed based fertilizer or one with fish oil. The pioneers learned to bury a small fish, or bones under each plant. Pretty sure that came from the Indians. Good luck!