They are about 7 days old, they both looked nice and green like the one on the right until yesterday. Nothing changed, it just started yellowing. Is it possible it grew too close to the light? 46w cfl was about 6" from the top of the cup, did it burn as it grew? thanks for any help
Same strain? If it isnt some residue from spraying, its probably calmag (rare at this stage, but possible is soil is deficient) and/or pH issues. You should provide more info. You can place the bulb 1-2 inches away, provided you have adequate ventilation.
Yes, same strain. Ww x big bud 3 to 1 perlite vermiculite. Ph was a little high, watered with 5.8 today. I know cal & mag will probably have deficiencies in my medium, but this early? Thanks for the info, I need all I can get. Sent from my SGH-T999 using Grasscity Forum mobile app
Yes, it can show up this early. And you have to be careful because its at such a delicate stage. I would experiment with very low dose increments of cal/mag and observe. Trial and error man.