The miscanthus reaches an impressive size, this applies not only to the height of the stalks but also to the size of the individual plants. What is less known is that the roots can also reach considerable dimensions.
Maximum root depth
The maximum possible root depth of miscanthus (bot. Miscanthus sinensis) is stated to be around 2.00 to 2.50 meters, also for giant miscanthus (bot. Miscanthus giganteus). However, this depth is only achieved with the best soil and a good supply of nutrients. However, over time the roots become very strong and relatively thick. Then the miscanthus is difficult to remove from the garden.
Does Miscanthus need a root barrier?
There are different varieties of miscanthus, most of which form clumps. But some also have longer root runners (rhizomes). A root barrier is definitely appropriate for these varieties. Clump-forming varieties do not need this restriction, but occasionally this restriction is still worth considering. An example is the presence of important wires or pipes in the ground that could be damaged by root growth.
What do I have to consider when planting?
When planting, you should consider how big the miscanthus will grow. Keep enough distance from neighboring plants and choose the location carefully. The sweet grass thrives particularly well in a sunny spot with slightly moist soil. If the reeds grow next to a dry stone wall, the roots may grow between the stones and are difficult to control.
Read the description of your Miscanthus carefully; the exact botanical name is important. If your miscanthus belongs to the less rhizomatous varieties or those that form very large clumps, then you may consider a root barrier.
The most important things in brief:
- Root depth of 2.5 m possible
- Root growth depends on soil and nutrient supply
- partly very strong root formation
- complete removal from the ground is often difficult
Tip
The roots of miscanthus can be very robust and resilient.
Also find out about pampas grass and how fast pampas grass grows.
