20 percent or lower humidity. Seedlings

15 days old. If I put a cup of water under my t5 with my 2 plants will the humidity get higher or maybe a bowl or plate? Any cheap solutions?

Depends on the size of your grow area. In a small tent I’ve used a warm wet hand towel spread out and partially in a bowl with water. Kinda like a wick and I was getting about a 15 rh improvement. Mind you you need heat for evaporation. I had temps at 27 deg and the towel would dry out in about 24 hours so you will just re soak

you should only need this while the girls are small. As the leaves grow and you water the pots more the humidity will increase nicely

Get them under some kind of dome. Coat hanger wire and Saran Wrap will do it.