I Have A Pampas Grass Plant In My Garden. I Planted It As A 30cm Plant About 4 Years Ago And It Hasn’t Produced Any Plumes In All
that time. Is there a reason for this? It's grown huge but never flowered.
Certified GKH Gardening Expert
This can have a few causes, but the main few are as follows:
Too much nitrogen in the soil, or not enough phosphorus and potassium will halt flowering. You can offset by adding phosphorus and potassium.
Sometimes, improper pruning, or pruning at the wrong time can cause this, as well. They are best pruned in Spring when new growth begins.
This article will help you to care for the grass: https://www.gardeningknowhow.com/ornamental/foliage/pampas-grass/growing-pampas-grass.htm
This will help you to prune: https://www.gardeningknowhow.com/ornamental/foliage/pampas-grass/pruning-pampas-grass.htm
Here is an article that will offer more information on lack of plumage in ornamental grasses: https://www.gardeningknowhow.com/ornamental/foliage/ornamental-grass/no-plumes-on-ornamental-grass.htm