Q.Why No Flowers On Pampas Grass
why does my pampas grass not flower?

Certified GKH Gardening Expert
Typically, this happens when there is too much nitrogen in the soil, or not enough phosphorus and potassium. It can also happen if the plant gets a little chilly in the winter, which is why most prefer to prune the dead portions out in spring, rather than fall.
Here is an article that will help you with the care of the grass:
https://www.gardeningknowhow.com/ornamental/foliage/pampas-grass/growing-pampas-grass.htm