Cbd clones problem

cbd clones have light green leaves and new forming leaves are dark green and in some cases burnt tips. Blown up in a greenhouse which has not been used for several years and nothing was given to them but water

Pictures?

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With out pics, it’s a guessing game.

Light green usually means they are hungry and began to feed on the plants stored nutrients vs nutes in the soil.

Burnt tips = overfed

But could also indicate a lock-out scenario.

Heres the famous lines for help with grows.

What medium?
Canopy temps (not a temp gauge tosses in a corner)?
Rh?
Strains?
Ph of water going in?
Pot size?
Environment
Nutrients used?
Any foliar sprays?

And pics, close ups of leaves, and pics of entire plant and or room if possible.

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