EDIT: probably should check the last post date before I go on writing a book on a thread that is 3 years old.
I study Viticulture and Enology (grape growing and wine making), and when growing grapes, it is important to stress them to produce flavorful berries. Grape growers cut certain clusters of grapes off to promote more enery transferred to other, more promising clusters. Even the soil is made to stress the plant by using sandy/loamy soil.
Now, most winemakers prefer small berries because they pack a more concentrated, robust flavor, but many still want large clusters and that is achieved by limiting the number of clusters that the plant can divert energy into.
Now I'm very new to growing cannabis (haven't yet), but if cannabis follows the same growth pattern as grapes (double-sigmoidal) then stressing may work for either increased bud size and/or potency. Just as a blind gut feeling, I am not sure if a sudden stress JUST before harvest would be detrimental or beneficial. I would assume that limiting the number of buds from the start (either during vegitative state or at the beginning of flowering) would allow more energy to be distributed to a select number or buds instead of many buds.
As I said, I have NO experience growing cannabis but from my horticulture studies, this makes sense to me.
A good experiment would be to have three plants under the same light, same soil, etc. The first plant would be the control in that it would grow uninhibited (or how ever the grower typically prunes). The second would inflict stress just before harvest. Finally, the third would follow a program of pruning late in the vegetative or early in the flowering stage. Then measure yield and find a reliable way to measure potency (It probably wouldn't be emperical enough, but I would volunteer to smoke some from each plant
Dang, I was originally going to grow just one plant...maybe it just got bumped up to three.
Edited by garretto, 24 February 2011 - 06:39 PM.
Pretty old thread