Being the hardy shade plant that they are, hostas will tolerate division from spring until about a month before frost. They need plenty of water the first couple of weeks to help get over the shock and cool conditions will certainly help them reestablish themselves. Don’t expect much new growth until the next season. Most medium sized or small hostas will be ready to divide again in 3-5 years. Larger ones may not need dividing for 8 or 10 years. When the stems and leaves circle around an empty middle, it is definitely time to divide. Otherwise divide when the plant becomes too large for its space or you want to increase the number of hostas in your garden. Most hostas can be lifted out of the ground for dividing. Use your spade to cut a circle around the plant about 4-5 ... [Read More]