Have you tried Pinching the main stalk? LSTing? HST? Fimming? Supercropping?

Tying her down is a good idea. Also look into Supercropping, and DEFINITELY pinching. People over at IC have trained taller sativas by pinching and LST.
WeayLay Reviewed by WeayLay on . Hawiian Snow: Need advice Anyone have any experience with this strain? Just turned her to flower after nine weeks of veg. She's massive, almost five feet tall, 18 to 30 inches taller than everything else. The base of her stalk is over an inch wide. Topped her at five weeks trying to slow her down. It did for a little while, a couple almost caught up to her. My problem is I think I'm going to run out of headroom. This is my second grow, just wandering how well she'll do going horizontal. My kush did pretty good being Rating: 5