Lack of ?

Like hybrid said....need more info, soil, nutes, water, temps blah blah.,

Revised: The Complete Guide To Sick Plants,pH and Pest Troubles - PlanetGanja.com This is a great link as well.
Weedhound Reviewed by Weedhound on . Yellowing leaves a problem? Brownish/Purple stems? Well this is about my Romulan mostly. Its leaves have been a yellow green color for as long as I have had it in bloom, approx. 3-4 weeks. I had noticed it's stems and branches turning purple. I did some searching and saw that it was either stress or natural. I water just as I do the rest of my plants and the pot size is adequate. As faras the leaves, some are starting to curl and fall off, i was thinkin it may be lack of phosphate, but I want to be sure what's going on. Hope to hear what the Rating: 5