don't know what the problem is I keep them watered regularly but this year the leaves have got so many brown spots on them is it a disease that I need to treat I would appreciate an answer so I don't lose them
From the photo, I am suspecting that it might be anthracnose, caused by a fungal pathogen. But symptoms coloration of some of the leaves suggest potential nutrient type or chemical type issues.
I would strongly suggest that you consider submitting a sample for diagnostic analysis to have better confidence in a good evaluation of the plant. Please visit http://plantclinic.tamu.edu for more information about submitting a specimen for analysis.