ICMag with help from Landrace Warden and The Vault is running a NEW contest in November! You can check it here.
Prizes are seeds & forum premium access. Come join in!
I don't know if that's cause for concern yet. Sometimes when the plants are healthy and growing fast they put out growth so quickly that the new growth can appear light green. As those parts continue to grow and develop they will darken up. If the problem persists or worsens then I would start to worry about it. If it gets worse it could be nute burn or pH issues...
obviously different plants from your opening post. in order for anyone to help you out, you'll have to give details about your grow. check out stitch's sticky at the top of this section. provide some details so some one can help
By she looks i will say she dont like those soil of wood chips,that medium
looks like orhideas soil-mix... while actually plant need good soil and some wormcastings..
I realize money may be an issue for you. but about $10 for some ph testing drops and some ph up&ph down will help you out a ton. drops always work and are always accurate. I think if you feed them a little it will definitely help out... it's hard to diagnose problems in some one else's grow without knowing most of the details, such as: soil type, ph, nutrients used, amendments added to the soil, temperatures, lights, etc