This is my diy greenhouse I made, and before I finished it and put it on grass I wanted to see the humidity levels. At 8:00 AM temps are 89F outside, 83 inside, and humidity 65-75% inside. At 12:00 (no direct sun), temps are 96, inside is 90, and 50-40% humidity. At 3:00pm (direct sun) the outside is 97, inside is 118, and humidity is 20-30%. I stick my head in the greenhouse and it doesn't necessarily feel dry, but it's crazy hot. I put these bowls in before taking the initial humidity at 8:00 am, and I have temp+humidity taken every 5 minutes for 4 hours, and there is a consistent trend in increasing internal heat and decreasing internal humidity.
For my international fellows: 83F is 28C, 90F is 32C, 100F is 37C, and 118F is 47.8C
What did I do wrong?? Do I need to cover the bottom since it's on stone? I plan on making 4-5 of these
by Squidsquace_
3 Comments
Why do you need a greenhouse if its so warm outside?
You need to allow the hot air to escape with vents up high and/or an exhaust fan of some sort.
What is your ambient outdoor humidity and is it high enough for bonsai?
Decreasing relative humidity, the absolute humidity (mass of water) stays the same. As the air heats up, the amount of moisture it can hold goes up as well, so the percentage of “full” goes down. When the air cools down the relative humidity goes up. When it cools enough to be at 100% relative humidity, it rains.
I would move these out of direct sun and install a small ultrasonic fogger in each.