Controlling Temperature and Humidity in Greenhouses 

That's very neat. Is it for a product or a passion?

Hi Peter. It sounds like you have humidity build up.If you have fans we recommend running them to push the humidity out, or heaters if it's too cold for fans.

Check out companies from israel, they are really on the cutting edge. Many options.

Hi Jan. Low humidity/VPD during the day may cause curling but there can be a variety of other reasons too.