The lower branch usually have smaller buds, because they are lower and the light don't reach them as the upper one, you should not worry about that. If you want them to get bigger you always put some CFL on the side of the plant or even an T5, may help get you more buds where the light not reaching.

For the fert you should check the manufacturer instructions... If you tell us what ure using we may be able to help you get better mix.
LuciferN Reviewed by LuciferN on . Advice on blooming plant I am new and made a mistake by posting this on the wrong board. I got the site right but the board wrong . I've moved it twice now and think I have the correct board now! I have a very nice, outdoor potted plant that is appx 2.5' and blooming nicely it seems. It won't produce a lot, but the quality is outstanding. The leaves even pack a little punch. I've always had a green thumb but I'm new to this. Right now, it has appx 12-14 tops or flowers. The larger tops are about 1 month old. Rating: 5