Low Humidity problems

Ok so my humidity is about around 20-25, and my average temp is 75-80f. On one of my plants even after I water it, the leaves still look dry and not totally open. So my question is, is there any other way besides buying a humidifier to raise my humidity? Im growing in a small space, its about 2'x3' and just under 4 feet tall, so space is limited.

Moist dirt seems to work well as obvious as it sounds. If you have any spare dirt, you could try simply keeping it moist under the light and it should add the surrounding humidity. Keeping any source of water out under a light (in a bucket, or whatever) will evaporate and also add to humidity. But I see you say space is limited so that all might take up too much room. I'm not sure what else you could do really. Hmm.

just put a bowl of water in der man shud raise it abit. lower humidity is better in flowering, im having the oppisite problem cant keep da humidity down.

What they said^^^. I have low humidity problems a lot, when my humidity gets too low i just put my watering pail in the tent with my plants and it raises the humidity noticeably. I also distill my water so when i put it in my tent the hot air evaporates more of it and distills it better(i think)