what nutes are you using? NPK?

your pH has a lot to do with nutrient uptake. like perp said, it looks like a potassium and possibly a magnesium deficiency as well.

you should think about getting a pH test kit from the pet store. you can get one for ~$6. get the one for freshwater aquariums. you can also pick up some pH up/down for ~$3 each. it will make a world of difference. you can also get a pH test pen for ~$25 on ebay.

during flower there is what's known as the 60/40 phenomena. the first 60% of flowering is what's called "the stretch", or growth. a plant can double or triple in size (depending on environment, strain, etc). the last 40% is when the buds will start to fatten up.

the reason the buds start to fatten up is because they whole purpose of a female cannabis plant is to make seeds for the next generation. it will show sex and then towards the end of it's life it starts to grow "buds", or the female flowers, as it tries to produce as many pistils as possible to catch male pollen so it can make seeds.

good growing.


-shake