What is TO MUCH Humidity?

[Red-Cricket]

Sounds like 50-60% is ideal humidity. Some plants grow in high humidity. But I heard that to much can be a bad thing. What are the facts! Thanks Gurus Red

 

[Hightide805]

too much will cause mold.. pretty much anything above what you said is bad. cannabis is not a plant to grow in high humidity. (unless your cloning but that a whole different story)

 

[Red-Cricket]

Thanks Hightide, so 60% should be considered Max. Great TY

 

[StormChaos]

Seedlings and Vegatative plants grow best when the RH is 60 to 70%

Flowering plants grow best in 40 to 60%

Seed Storage is best at 5% (five)

Lower humidty discourages disease and pests. As with tempature, consistent humidity promotes healthy and even growth. RH affects the transpiration rate of the stomata. WHenhumidty is high water evaporates slowly. The stomata close, transpiration slows... plant growth slows.

Transpiration in dryier conditions will be rapid ONLY if there is enough water for the plants roots to draw in. If the water supply is insuffienct - the stomata will close to protect the plant from dehydration... and again growth will slow.

When the RH is above 70% the pressure is toomuch outside the leaf and the too little inside -stomata close...plant growth slow.

Humidity over 80% discourages spider mites and encourages fungus and root/stem rot. Humidty 60% and less reduces chances of fungus and rot.

40 to 60% is a safe level that encourages transpiration and discourages fungus growth

 

[BWC BayArea]

Seedlings and Vegatative plants grow best when the RH is 60 to 70%

Flowering plants grow best in 40 to 60%


Lower humidty discourages disease and pests. As with tempature, consistent humidity promotes healthy and even growth. RH affects the transpiration rate of the stomata. WHenhumidty is high water evaporates slowly. The stomata close, transpiration slows... plant growth slows.

Transpiration in dryier conditions will be rapid ONLY if there is enough water for the plants roots to draw in. If the water supply is insuffienct - the stomata will close to protect the plant from dehydration... and again growth will slow.

When the RH is above 70% the pressure is toomuch outside the leaf and the too little inside -stomata close...plant growth slow.

Humidity over 80% discourages spider mites and encourages fungus and root/stem rot. Humidty 60% and less reduces chances of fungus and rot.

40 to 60% is a safe level that encourages transpiration and discourages fungus growth

Couldn't have said it better myself. Except I believe that humidity below 50% reduces ur chances of fungus substantially. The natural climate of ur region plays a major part for grower's w/out complete environmental control of a sealed room.

 

[Tead]

Just one additional thought here... strain can make a difference too. I've seen "Mold resistant" strains advertised.

Cheers