Fast growing sativas?

I live in BC and was wondering if there were any sativa plants that have a really nice head/trippy high that grow fast and could be harvested like halfway through september or even earlier like in august?

Thankx

also is mighty mite a good indinca stone? I have the chance to buy 5 grams of mighty mite but should I or not. I really love sativas better then indinaca but if its a really good indinaca then ill buy some.

thanks

ill ive ever smoked was indica i assume.. i dont actually know...