Potted Lemon Tree Spotted Brown Leaves

I woke up this morning to my lemon tree having these brown spots (they weren’t there yesterday, and its never had them before.

I did just give it fertilizer for the first time yesterday, and I used the Espoma Citrus-Tone fertilizer. The directions were to use 1 tsp for every 4 inches in pot diameter but double the rate if over 12 inches. My pot’s 16 inches, so i used 8 tsp of fertilizer.

I’ve also never noticed bugs on it at all.

Does anyone know what this is and how to fix it?

Thank you!

High Kassidy. I don’t know much about lemon trees but it appears to be some sort of fungus. I would try some neem. I don’t think it’s a good idea to use if it’s above 85 degrees F. Check the label because I haven’t bought any garden chemicals in years. It’s also a great insecticide. I hope this helps. Scott