What does this discoloration mean?

[Zandor]

You don't start feeding nutrients to seedlings. You start feeding nutrients once you are in the vegetation cycle. That starts once you have your 4th set of true leaves formed as a guide. Then you can use HID lights too if you got them. Use only fluorescents lights before that so yo don't get the inside temperature to hot.

Zandor Reviewed by Zandor on 09-08-2005. What does this discoloration mean? This plant is a week and a half old since seed. The leaves started yellowing in the middle with the darker normal green concetrated towards the stem. The tips of the secondary leaves are yellowing too. This is happening to 3/4 of my plants so figured I'd ask. It looks less yellow in the picture than in real life. They are in Sunshine Mix #1 being fed 6.0 water, switched to 6.5 today. No nutes have been added yet, just superthrive in the water. Temps are around 75-80 with CFLs. I have Rating: 5

[stickygreenlightsabr]

Cool. Well they are all starting to form their 5th set of leaves now.

[Zandor]

Cool. Well they are all starting to form their 5th set of leaves now.

Now you are in the vegetation cycle and you can feed them nutrients now.