That yellowing is totally normal. It's happening on the lower growth because it's not receiving enough light. I'd just prune off those lower leaves (and even the tiny buds down there) because they're not going to turn into a whole lot. Those look like very healthy plants. No worries.
mcozzy1 Reviewed by mcozzy1 on . sour deisel is doin good but....... just one plant does not look so good 4 weeks into flowering any guesses what it might be anyone? Rating: 5