I'm a total newbie and new home owner and I would really, really appreciate your suggestions. My house is in San Dimas, California. It has 2 front lawns of about 200 sq ft each. We moved in on April 1st so it's been 2 full months. Before that the lawn might or might not have been well taken care of, but it was very green and looked strong in the month it took from the first time we saw the house till we moved in.
There is an automatic sprinkler system that has been set for 3am everyday, not sure how many minutes every time. In addition it has rained unusually much for this region in May, and it has been quite gray (also very unusual).
I have a number of questions, please forgive my ignorance, I'm learning as fast as I can considering there is so much to take control of in this house

1. Can you guess what kind of grass I have? I don't know what the main type is, I do know there is some centipede grass in the borders of the lawn, but it doesn't seem to be the main type. I also know that the previous owner must have used Scotts EZSeed Patch & Repair Tall Fescue Lawns at least to repatch, there was an almost empty bag next to the lawn. Is the grass type Tall Fescue indeed?
2. Can you guess why the lawn is turning yellow from the pictures? I have measured the PH both with a stick in tool and with a chemistry kit, it seems to be between 7 and 7.5, which seems quite normal given the soil is clay and they did not use a top soil as far as I can see, the grass is in the clay. The chem levels for Nitrogen, Postash and Phosphorus also seem fine, good levels of all of them in the soil, so not even close to depleted.
My very uneducated guess here would be that the lawn is overwatered (temperatures have been below or around 70 this month, not hot at all) and/or it has some kind of fungus infection, but I cannot see any mushrooms. Hope the pictures are good enough so that you can see something there.
3. There might also be a mole in there, or not. When we first moved in, I saw a couple of volcanos in the front lawn, and I proceeded to step on them to close them. They have not reappeared, and I haven't seen other signs of moles in the front lawn. But in the last 2 months I did find 2 drowned moles in the pool, which is in the backyard, far away from the front lawn.
Pls help, any suggestion is welcome, my first goal is to take control of this lawn so it doesn't die and I can get it back to luscious green before the hot California summer kicks in if possible. Pls let me know if you need any additional pictures or data to give a better suggestion.
Best, Hugo


