Good morning, I have a Frosty Purple Freak plant (Check out my diary), and it's developing very little. I'm starting to suspect it might be an autoflowering. I would like to know what you really think about its development and if it could be autoflowering?

Not an autoflower. Photoperiods show preflowers eventually. At 12 weeks if it were an autoflower, it would have shown more than just preflowers. Whether it is an auto or a photo, it's the same causes for good vs slow growth. Autoflowers are not different.. they merely go into flower due to different causes. The reddish-purple color makes me ask about night time temps. If too cold, that's most definitely a factor in the slow growth and leaf symptoms. Looks nitrogen defecient at the least. fertilizing at all or depending on the earth? plastic covering soil to reduce weeds also reduces o2 to roots. So, i'd wager a matter of climate and poor rootzone is why you have some slow growth. But again, if temps are unusually cold, this fucks with biology/chemistry that occurs in the plants... if that's the case, adding more nutes won't help much as the reactions still are hindered involving those nutritional molecules.