Sure it will. The freezing cold will help to break it down. during the thaw in the spring organic matter will be saturated with moisture and will break down readily.
its a hard question to answer. It all depends on a number of factors, like strain and amount of light hitting the plants. If the plants are semi shaded then they tend to stretch quite a bit. If they are close to bushes or fences they tend to have to compete for light depending on where the sun...
prepping your soil now for next year is the best thing you can do. What I suggest is to load up your beds or holes with lots of manure or compost. you dont have to mix it in right away. I would break up the top layer and mix a little bit of some manure or compost. then layer as much as you can...
You need to change it up. If your not happy with the end result of your grows than you need to swtich up your techniqes until you figure out whats wrong. Change your medium, change your seeds, change your grow room temperature, yada yada.
are you checking water ph? soil ph?
im not say what...