Humidity and how much plants drink
- Thread starter rsx2009
- Start date
Lordhooha
Well-Known Member
Yes and no, they will drink more but you also have to consider more evaporates into the air when its drier. This is the reason I'm adding a humidifier to my geothermal this week because it's too dry in my house during the winter.
whitebb2727
Well-Known Member
Its more than that. Its temp and humidity.
Generally the hotter and drier the more you will have to water. Doesn't mean its taking in more.
Generally the hotter and drier the more you will have to water. Doesn't mean its taking in more.
ddogz
Member
I get the hotter it is the more they will transpire but will high humidty stop them transpiring as much
whitebb2727
Well-Known Member
Again that is based on temps also.
http://www.just4growers.com/stream/temperature-humidity-and-c02/vapor-pressure-deficit-the-hidden-force-on-your-plants.aspx
ddogz
Member
Will give that a read I did just find something online https://www.theweedblog.com/the-structure-and-function-of-stomata-on-a-marijuana-leaf/ it might be worth a read it does mention in high humidty the stomata can stay open coz they arnt likely to suffer moisture loss but will have to read it again to see if it mentions if it could slow the transpiration
whitebb2727
Well-Known Member
I try to keep humidity lower than most.
I prefer temps in the 70's and humidity in the 40% range.
ddogz
Member
Hopefully I will be in that range soon just started reading from that site looks like it may slow transpiration coz the dryer the air the more they transpire I know it doesn't say that but just a guess
Just found this
Under Pressure
All gasses in the air exert a certain "pressure." The more water vapor in the air the greater the vapor pressure. What does this mean? Well, in high RH conditions (think of Florida again) there is a greater vapor pressure being exerted on plants than in low RH conditions. From a plant's perspective, high vapor pressure can be thought of as an unseen force in the air pushing on the plants from all directions. This pressure is exerted onto the leaves by the high concentration of water vapor in the air making it harder for the plant to 'push back' by losing water into the air by transpiration. This is why with high RH plants transpire less. Conversely, in environments with low RH, only a small amount of pressure is exerted on the plants' leaves, making it easy for them to lose water into the air.
ddogz
Member
Sorry I jacked your thread man hopefully some of it was of use