Greasy Spot on Lemon Tree
My lemon tree has "Greasy Spot" fungus. It's not very bad yet. It's full of blooms and small fruit. Some sources say to spray with liquid copper in June. Why June? Shouldn't I spray now before it gets too bad?
Certified GKH Gardening Expert
Yes, June to late July are the recommended times to spray, though you can also begin treatment as early as mid-May. Here is more information: https://www.gardeningknowhow.com/edible/fruits/citrus/greasy-spot-fungus.htm