Question by MB: how do I split hosta plants? Mine are three years old, and too large for the area.?
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Answer by tracy_h81
dig below the root base and be careful when you pull them up not to rip the foliage, then just separate into to sections of how many you want to plant. Its easy, and they are hard to kill so you shouldn’t have a problem.
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simply dig up the part you no longer want or you can split them by using a shovel to dig down and then transplant
Dig around the perimeter of the plant and lift it out of the ground. To make division easier, turn it upside-down or on its side. With a sharp spade or an old kitchen knife, divide the plant into as many sections as you’d like.
To add to the above answers, sometimes soaking clumps in large buckets can make it easier to pry them apart.