Strawberry Banana Outdoor 1st Grow

It's been pretty cold the last few days so considering the weather there are some nice little nuggets developing on quite a few different branches, although as expected the back is smaller than the front. Fingers crossed the weather picks up and the nuggets grow into huge buds 😊😊 Some of the backside (darker side) fan leaves near the bottom but not necessarily at the bottom have turned yellow with some brownish marks. Not sure what this is? Just checked my ph recently and it was high so I've now sorted that, but I've had no problems up to this point so I'm not certain it's pH.