Answer: Maiden grass (Miscanthus) generally forms a larger and larger clump, but it does not spread wildly. It is a large plant, so you should plan on space for it over the years. It can remain in place for five years -- or more -- without being divided. Eventually it may begin to turn hollow in the center, showing a sort of donut shape to its growth from the ground. At that point it should be divided to restore vigor to the plant. You can also take divisions to try to control its size and to propagate it. Take divisions in early spring. You may dig up the entire plant or just a part of it -- this is more likely, it is a huge job to dig up the whole plant. It is very difficult to dig and takes a good amount of strength because the roots are very strong, so be prepared with sharp flat spades, mattocks, and whatever else seems useful. Replant immediately at the same depth as it grew originally, keep well watered while it becomes established just as you would for any new plant. Good luck with your project.
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