i am right of lake Erie and most of my plants are stacking already and expect to finish end of September mid October . if you let that girl go natural light right now it will most likely finish mid to late October depending on the strain and your location , but there are lots of warm sunny days in October even in November depending on the year . you could make a small greenhouse make some vent holes , to protect her on the rainy colder days . but you will risk mold and other problems . if you do a mix of indoor outdoor and it gets at least 5 or 6 hours direct sun light a day then whatever your artificial lighting is wont be such a big deal since your on a budget and you could veg that plant till end of the month and finish end of October start of November . you know where you live and how the weather can be so unpredictable at that time of year