Question: I have a waterfall in my garden that allows for plants to be set out at the top of it near the running water. My problem is that the plants I have used keep drowning, and I have no way to cut off the water flow without stopping the waterfall. Are there any plants (small, please) that thrive in areas of abundant moisture?
Answer: Good flowers for the rim of a pool or waterfall are astilbes, cardinal flower, Japanese and Siberian irises, loosestrife, marsh marigold, rose mallow, daylilies, and perennial candelabra-type primroses. Water plants include water lilies, water hyacinths, water poppies, and water snowflakes, although the latter three are not winter hardy.