Knowledgebase
Fig leaves browning #434865
Asked November 18, 2017, 12:43 PM EST
Multnomah County Oregon
Expert Response
The browning between the veins of the leaves, though, would appear to be a different issue. After reviewing several Extension articles with photos with similarities and this nutrient disorder article, I think your soil (and therefore your plant) lacks potassium, one of the "big three" nutrients that plants need. (The other two are nitrogen and phosphorus. On a fertilizer label, the numbers indicate the percentage--by weight--of nitrogen, phosphorus and potassium, in that order. That's what "10-10-10" means, for example.)
Figs, when planted outside in our climate, are deciduous. They lose their leaves in the winter. So your plant is going to be without leaves soon anyway. I suggest you use the winter to add lots of well-composted organic material to the soil, and it will begin to supply your plant with these necessary 'foods' as it is incorporated over the winter. And you can 'dress' your plant in the spring with more well-composted material, which will continue to feed it throughout the growing season. Here's a link to a great Extension article about how this all works in the garden.
I hope this information is helpful. Good luck!