what i found out with my first two grows is that if you trim off all the BS branches before you put it into flower, the colas will grow much bigger. So if you cut off the branches that wont produce decent size nugs, you will get bigger nugs all over. so for instance, my first three plants i did not trim branches at all. my biggest nug was about 5 grams dried. now the plants i have going now, i trimmed all the little branches. there are about 10 nugs on each as opposed to 20-30. the nugs on these babes are as wide as a coffee mug and a good 7 inches long. this is just one way to get bigger nugs. also heat has a huge impact. if those temps get about 84-85 you will definitely notice the growth is slower than if you had temps at 70-78. hope this helps.