Purple stems.....

i just found out that the grape ape clones that i have had for about a month are not a purple strain and they have purple stems and now developing dark coloring on the leaves and dying. Not to mention the fact that for the amount of time i had them they should be about 3 or 4 times bigger. From the research i have done i can only suspect that they have had sulfur deficiency there whole life. Does that sound right at all?

Hmm, I'm not sure. Check the FAQ section, I think there's a plant problem troubleshooting thingy in there.