Whats up with my Leaves on lower branches??

this is one leaf i removed from my main plant 4 weeks into flowering. Any ideas? Spider mites maybe? nute problem???
pic is out of focus but you can still see the rust spots

i would say it one out of these three

MG deficiency

Nute Burn

PH too low or to high

that is extactly what my plants looked like into flowering stages,

it looks like a nutrient defficiency, how often do you feed them? did you use miracle grow or regular potting soil?you should also check for spider mites, and if you have spider mites, depending on how much your buds have grown since the beggining of flowering, you might be able to use a pesticide thats safe for edible plants.

spider mites are generallly a lot of small dots the size of a pinhead. Get a better picture and a picture of the whole plant. too hard too tell need more info. could be lockout or a defeniency.