I will also say that your lights were probably way too far away from your plants. My favorite strain is White Widow, who grows much like a pure sativa. She is a leggy thing, and without a lot of care she can get way too tall for my tent. With fluorescents, you should get those lights right down close to the plants all through veg... no more than 4 inches away. Your plants will love it, and they will stop reaching so much for the light.

Careful use of the FIM technique or supercropping can turn your long legged sativa into a respectable bush that can be very effective in the flowering room, lessening your need for so many plants as well as keeping the overall height to a manageable level. Here is a picture of the latest White Widow bush that I have created. By repeatedly trimming the upper growth using the FIM method, I have encouraged all of the side growth in this plant to rise to the top, and now will send it to flower to develop approximately 16 kolas. This will be a very hungry plant, devouring all the nutes that I will be able to throw at it. It will remain fairly short however, 1/2 a meter or so, because it has never been more than 4 inches from a light and all the nodes are tight for a sativa. It will stretch about 40% in flower, but still very manageable.

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