Northern lights and haze behavior?

I have a NLxH in flower almost 3 weeks now, my question is...the damn thing is 7 ft. tall and seems to still be streching, is this normal for that particular strain?, my others seemed to quit stretching around 5 ft., I am running outta room like yesterday lol, this is my first time growing sativa's, hell my Hawaiian indica is 5 ft. or better, out of all the growing i have done i never seen an indica get over 4 ft. and considering i am a closet grower it is quite odd, since i am a indica grower, sativa's are completely new to me...is this normal behavior for a sativa? Any input would be greatly appreciated :wall:
 
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