I am a first time unheated garage grower and built my own insulated grow box. I'm using 280 actual watts of CFL's on 4 plants and have maintain temp between 70 and 80*. I'm using FF soil and have added little nutrients to date. All of my plants look fine so far although I question this one. It took off fine but new growth now has a florescent, yellow on green appearance. The plant is 30 days from seed. It is a little stunted compared to the others. Is this yellow a sign of copper deficiency, normal for some strains, or what? This is a "mystery" seed from Nirvana. Thanks for any response.