I have this large ZZ plant (Zamioculcas Zamifolia) and it is doing well for the most part. It always grows flowers and it's always growing new shoots. I have it on my porch so it gets lots of morning sun and the rest of the day it's shady. I water it once a month. The problem is the leaves are very bright green and it looks yellow on the edges. I tend to cut back a lot of those stalks because it's ugly but I have too many stumps now so I want to know how to fix this. Thanks for reading.