it will, but not as rapid as it should do, keep exposing to cold temps and she will eventually give up. with regards to your rounded leaf you probably have an indica strain, there characteristics are wide large roundish leaves where as the sativa strain are more like thin sharp finger width. u say you 3 weeks into maturing is that ur term for flowering? which means u have a minimal of 5 weeks left.. its gonna get colder mate. i personally would bring her in and finish her off with an indoor set up, theres loads of threads on how too, and the cannabis faq on the home screen, i would have a read of that it will help you out with your yellow spots too, but thats usually a sign of nute deficiency of sorts. if u cant go indoor, then try ur best with the ones you have.. but dont hold out for massive plants, your fighting mother nature, only way u can win is with deception of your own indoor environment, if your only option is out doors then wait till the 1st of may 2013 and then start again that should give you maximum 'growing time' ha provided we make it past the 22nd

hope this helps