Q.Pampas grass
Do you have to prune pampas grass after one year’s growth? The plant is not fully grown yet.

Downtoearthdigs
Answered on March 22, 2017
You should cut down the plumes at the end of winter, to make room for the new plumes in the spring.
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
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