Q.How do I get rid of powdery mildew on my goji berry tree?
I would like to use an organic fungicide if possible. The top of every leaf is covered, and once new shoots come through, they get covered too. It’s a young plant. I planted it out this spring. Getting a lot of flowers but no fruit. I believe this is because of the powdery mildew. I would be grateful for any suggestions/information.
Powdery mildew is a common problem, but fortunately also treatable. This article will point you in the right direction: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm
All plants have their own defense mechanisms, so your number one goal as a gardener is to provide what your plants need to be as strong as possible, so that they can ward off things like powdery mildew. Perhaps there's some information in this article that you can use toward that end: https://www.gardeningknowhow.com/edible/fruits/goji-berry/growing-goji-berry-shrubs.htm