Q.Guava Leaves Turned To Yellow & Brown
Hi I’ve two guava plants in a container. In Guava 1(more then 3 years): leaves turned to yellow with green veins even new leaves have same issue. Second old leaves curling downward. In Guava 2(more then 2 years): New leaves are curling with brown spots but old leaves is perfectly fine. Your expert advice is highly appreciated.
Certified GKH Gardening Expert
Unfortunately, without photos it will be hard to tell what is going on.
I suspect a pH issue, which can appear as a Magnesium deficiency, but this does not rule out infection, or an actual Magnesium deficiency.
The first place I would start would be soil testing. Testing nutrient contents and pH will give you a good idea of what the soil lacks, or if you need to adjust the pH. These articles will help:
That does not rule out the possibility of infection. A fungicide can be used for preventative measure:
This article will help you to the care of the tree: