there is no possibility for that, maybe a booster can help you ripen faster, but not like inside, outside boosters are mainly used for higher yields and so that the plant does not stretch too much... I had neville haze outside and I was lucky enough to have great weather until the end of November that year, but I was not lucky with prying eyes, so for that reason I had to take it off at the end of October... it ripens in the middle of November or in the third week, I don't remember exactly now, 90% is a sativa, but believe me it's better to wait until the end because you won't regret it, the strain is sickly good, and if you're worried about temperatures, my neville pushed through the night temperatures of 3-4 degrees C without any problems, no hybrid or indica could tolerate the cold as well as neville