create overflowing window boxes and planters inexpensively: with divided mature plants setting side by side in planter (gives a quick overflowing planter box to start off summer)

While you are mixing up that soil add these water storing crystals to the mix. These little things are a life saver! They absorb water and turn into clear jello looking blobs and hold the water in and slowly release it as needed. 4 of my flower boxes are on our 2nd story and it is a pain to hang out the window and water them every day, these allow me to skip that chore more often.