Fungal disease or lack of nutrients?
I have a 7' Mission Fig outdoors, in coastal Southern CA. Planted in June, gets full sun pretty much the entire day. Soil is a mix of compost (60%) and original clay soil (40%). I used a small amount of fertilizer when I planted. Plant is watered about 3x/week, average amount of water.
For the past 6 weeks or so, the tree has been losing leaves. Affected leaves look like in the image. We got a decent amount of coastal fog in the mornings pretty much all summer long, and lost a lot of squash and tomato to powdery mildew. I figured this was a type of fungal disease also, and have been spraying the leaves every 10 days with either copper spray or Neem oil, but the problem continues.
Any idea if this is a fungal disease at work or if this could be a lack of nutrients or too much/too little water?