ElTelmoanswered grow question 4y ago It's hard to tell from the photo, but from what you say, you're doing a grow with homemade products. They're not the best; eggshells have bacteria and rot, they're for making compost, not food. The coffee grounds are the same. If you want an organic grow, the technique is different: worm humus, bat guano, seaweed, compost. From what I see in your grow, it has low humidity; 37% is very low, around 55-60% is better! Good luck!