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and well below 18°C growth will be slowed and above 28°C cannabis grow rather well from my experience up to 35°C-38°C without issues depending phenotypes.
you've to understand vpd is about marginal gain for large scale commercial growing operation, it has very little interest for hte home grower.
first you can't even control vpd outdoor, rh and temp on so on vpd will change all the time on a daily basis and across the growing season outdoor and will often be out of range, despite that the buds will grow and swell well enough most of the time
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I disagree with ya there. Your right on vpd outside why would you try outside lol. VPD can be used by growers indoors. Why wouldn't I want my plant to be in correct humidity and temp so that the plant improves uptake and transpiration etc. When I combine vpd and dwc it is a hell of a growth rate,nothing like a slug in soil lol. Knock on wood I have not had mold etc while doing this. No matter how big the flowers are. Have a good one Vince
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you cant control anything outside!
Thats the beauty of indoor growing. Control.
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