Also called "topping". We did a non-scientific test on GW(**) a few years ago; several growers, several varieties, topped vs. un-topped siblings, nominally identical growing conditions.
Lessons learned:
* Topping produces squatter, fuller plants, which may or not be desirable (in the thread mentioned above it was to keep the plants short so they continue to fit under lights)
* It does retard development some, which may or may not be a problem
* It does not affect overall production: some examples were better some worse. Seemed to be within the 'natural' variation between individual plants.
** Might have been on C2C, the post-GW board.
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