Gerbera – Whether you are growing gerbera daisies as perennials or as annuals, houseplants, or landscape plants, a key to their proper care is getting the watering right. Water them faithfully to get them started, but, thereafter, beware overwatering. All things considered, there is probably a greater chance of killing them by overwatering than by underwatering. The idea is to have an evenly moist (but not soggy) soil at the level of their roots. Time for planting: April, May, June.