This is true.
It could also signal Phosphorus deficiency.
However, actual deficiencies in soil are quite rare.
(Almost non-existent with seedlings)
And, if either is caused by a lockout. (From low PH for instance.)
Adding more will not help.
First, control the PH, then see if she lacks anything.

A.,
W.
Weezard Reviewed by Weezard on . Flowering too early? It's about 12 days old 24/0 Light cycle under 4 CFLs. Just yesterday I noticed the stems starting to turn a purplish-ish color and growth from the top of the bottom node. I was wondering what is going on, is it flowering too early? And what are my options from here? Here are some pictures. 290080290081 Rating: 5