three weeks old......you should be fine without raising the humidity, your plants are out of that stage. Typically the humidity domes are for seeds, cloning, etc.... your humidity in the closet is fine now, and will raise as your plants get bigger, but keep in mind that if you raise the humidity, your raising the chances for rot...

but if you do want to raise the humidity of your room, just do what tex said and that will raise it some...
whatsthatsmell Reviewed by whatsthatsmell on . Grow box humidity????? Hey folks, I've built a box with a 600 w air cooled hps and a substantial ventilation system. I can keep the box in the upper 70's but the humidity is running about 20% due to the amount of airflow. About 160 cfm in and 100 cfm out. This is my first grow and the plants are about 3 weeks and seeming to love the light. Won't the humidity climb as the plants grow? and do I have any worries with the current levels?? Thanks! :cool: Farmer Rich Rating: 5