Plant Training Calculator

Training techniques -- topping and low-stress training (LST) -- reshape how a plant grows so that light and space are used more efficiently than an untrained plant's natural growth habit would allow. This calculator schedules two of the most common techniques around your desired number of top (flowering/fruiting) sites. Topping cuts the main growing tip, which forces the plant to branch, and each topping event roughly doubles the number of main tops the plant can develop -- so reaching a target top count works backward from that doubling relationship to figure out how many topping events are needed. The timing of the first topping depends on growth habit: bushier, more compact growth patterns need an extra week to develop enough nodes before the plant can tolerate a topping cut without stalling growth, while taller or vine-type growers reach that node count sooner.

LST typically begins about a week after the first topping, once the plant has recovered enough to have its branches gently bent and secured without snapping. Expected canopy spread combines the plant's natural vegetative growth (governed by growth habit and the number of weeks in vegetative growth) with the additional width training techniques typically add, capped at whatever space you've declared available -- training can fill a footprint efficiently, but it cannot exceed the physical space you have. The yield multiplier is a rough estimate of how much more flowering/fruiting site potential training adds versus leaving the plant untrained; it is a planning heuristic, not a guaranteed outcome, since actual yield depends heavily on light, nutrients, and genetics.