Be warned that increasing humidity can increase your chances of pythium wilt fungus, damping off, which seedlings are very vulnerable to. I keep my humidity below 50% and have never seen it. Plants seem fine. They get misted with neem every day to- makes a nice shine on the leaves, acts as an anti-transpiration agent too so drier air is less of an issue.
stinkyattic Reviewed by stinkyattic on . Humidity Question Hi... I have a small grow going and i'm monitoring the relative humidity. I am sitting at around 45-46% RH with three seedlings under 24hr flouro (only a few days old). Everything I have read says i'm about 10-15% off of the optimum level. I am not running fans on the seedlings but do have a gentle fan that I can use to circulate air without disturbing/shaking the plants. What can I do to bump up the RH? Is it important that I do so? My idea has been that I could leave a small Rating: 5