Q: Some of the leaves on my fig tree are turning yellow and rusty looking. Overall, the tree looks healthy and is producing fruit. I don’t see any bugs or caterpillars on the tree but I’m concerned that it might have problems. Is this normal or should I be treating the tree with something?
A: Your fig is showing signs of nutrient deficiency and drought stress. Application of a nitrogen fertilizer along with some irrigation should fix this problem. For an average tree, about a half pound of nitrogen is appropriate. This can be split in three applications over the year, spring, summer, and fall. Make sure you water after applying so the fertilizer reaches the absorbing roots.
Peter L. Warren is the urban horticulture agent for the Pima County Cooperative Extension and the University of Arizona. Questions and photos may be emailed to tucsongardensage@gmail.com
