How high is the growth of pampas grass per year?
How fast and how high pampas grass grows each year depends on the variety. There are over 600 species, but only a few are grown in the garden.
Provide sufficient nutrients
In order for pampas grass to grow rapidly, it needs sufficient nutrients. Fertilizing is therefore essential, regardless of whether it grows in the tub or in the garden bed.
Pampas grass grows particularly well as a single plant, since other plants do not dispute the nutrients. If you combine several varieties with each other, you must keep sufficient planting distance.