Hey there guys, I'm new to growing and I just need to know some possible causes for some slight discoloration on one of my plants. I currently have two growing, one is three inches tall while my other one is only two inches. The taller one is a nice darker green color while my other one is a very bright green and slightly yellow. It's basically a yellowish green. Both plants have been planted at the same time and have had the exact same conditions. I'm just asking for some knowledge. Thanks