Greenhouse humidity?

Whats the max humidity that the meter should read in a greenhouse?
what about the max temp?

I don't know what the maxes are. But you should aim for 23c, for temperature. 50% humidity for veg growing, 30% for late flowering. I hope that helps.

From my Experiance Growing in Greenhouses (never Marijuana) Unless you are using somesort of Humidification unit, you don't want it much higher then 50%. If it goes above 50% just after watering and down again in a few hours, thats fine. But to keep it above 50 all the time is not good, and usually means overwatering.

IslandGreenGuy said:

From my Experiance Growing in Greenhouses (never Marijuana) Unless you are using somesort of Humidification unit, you don't want it much higher then 50%. If it goes above 50% just after watering and down again in a few hours, thats fine. But to keep it above 50 all the time is not good, and usually means overwatering.

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Yeah, listen to that guy. Good advice.

Thank you..

well its kinda a make shift greenhouse. rebar with plastic. but its kinda sealed pretty good... HELP!????????/

Whats your problem? Is the humidity to High? Get a few good box fans. Atleast 20 inches. What you really nead is a vortex fan, That would suck out tons of air and hummidity. You could buy a Dehumitifier, they are fairly cheep, under 100. 76 deg, is the highest you want your temp to be. It can go to about 80-82, but only for a short peroid during the day. Growth will slow after 80deg and stop soon after that.

My job is at a nursery, working in greenhouses, I monitor the elements at night. And I maintain perfect conditions for the plants. I used to work during the day, and thats how I know about the temp and hummidity controll..

to keep the temp down inside, you need to get lots and lots of air movment. The Fraise greenhouse effect, is what you are dealing with. The air inside gets too hot and cant escape fast enough, just like inside your parked car on hot summer day. You get in and the first thing you do is open the windows, Once the air starts flowing, it cools down. You need to "open the windows" of your greenhouse. Instead of window, you need lots of fans, You need intake fans, outtake fans and rotating fans inside to blow around the stail hot air. this will lower your humidity and your temp.

Well i just bought a digital hygro-thermometer. the highest temp was measured at about 118F and the highest humity level was 90%
sooooo i was running a small room fan point out where there a little tiny space to squeeze through. brought the temp and humidity down but i didnt think it was enough. and i could tell they were getting too much moisture and water cause the edges of the leaves were starting to curl up.
thanks a lot for the help i'll run to home depot as soon as i can to grab some things for it.
Peace.

I want a big shiny greenhouse sooooo badly. Life isn't fair.

its not a real one. we just bent some rebar and covered it with plastic. it works really well but i'm having trouble keeping the temp n stuff level.

I would strongly suggest that you spend the extra money at lowest or home depot to get the attic fan that runs off a and comes with a solar panel. those fans move around 1,000 cfm...which is what you need durning the day only...how tall is the structure how long... did i miss that ....also consider another layer of plastic with a few inches of space between this air pocket will reduce the amount of heat transfer. the best way to do it is with a layer of water trapped in the plastic but it takes some skill..... blessings

They are gone.
I had to get rid of them because of my family. but i have a card!!