What Is This Brown That Is Growing On My Guanabana Leaves Leaves?

Question

I just bought these guanabana trees. Planted them on Monday. Today, 3 days later the leaves did this. I watered one time on Monday, but it the soil was still wet and I didn’t want to overdo it.

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Answer 1

I would be very concerned with the soil that it was planted into. Immediate infections like this could signify heavily infected soil, pH issues (such as a high pH), or nutrient burns.

This article will help you to care for the tree:

https://www.gardeningknowhow.com/edible/fruits/soursop/soursop-tree-care.htm

Answer 2

I bought regular potting soil and used something called "Rocket Root" that the company who sold the trees sold to me. What is the best method to change the PH of the soil?