I have a potted geranium plant that I suspect has Botrytis blight. Can it be saved or should I throw it away?
Both, actually. You can save the main plant by heavy pruning, but if it is in fact Botrytis Blight, you'll want to burn or bury the dead or damaged green material.
Read more at Gardening Know How: Gray Mold Control: Learn About The Treatment Of Botrytis Blight https://www.gardeningknowhow.com/plant-problems/disease/treating-botrytis-blight.htm