2 plants - same soil, same fert = different outcome? Why?

So I've got 2 plants that are the same age (3 weeks) and I gave them their first dose of fertilizer a few days ago (organic bone/blood meal tea). Both plants are in the same soil mix, and received the same amount of the fertilizer tea. I've checked the ph of the soil in both pots and they were fine (both the same).

One plant is doing beautifully since the feeding, and the other looks to have been burnt by the feeding. Some of the leaves have become brown at the tips and are curling under and dying.

What the hell? How does one plant get burned using the same fert as the other plant, which is THRIVING now after the fert?

I don't get it the only real difference between the two plants is one is under CFLs and a T5 and the other is just under the T5 (recovering from a 42W bulb that fell on it and burned off one of the growing tips).

What's going on here?

I didn't get if the plants are the same strain, cause if they're not, it's pretty clear. Different strains, different metabolisms.

If they're the same strain, then it's because of the difference in light. More light means faster metabolism, means the plant can handle and work with more nutes. Less light means that the plant cannot fully process all the nutes, so it just gets burned.

Doctor Cannabis said:

I didn't get if the plants are the same strain, cause if they're not, it's pretty clear. Different strains, different metabolisms.

If they're the same strain, then it's because of the difference in light. More light means faster metabolism, means the plant can handle and work with more nutes. Less light means that the plant cannot fully process all the nutes, so it just gets burned.

Click to expand...

They're bag seeds, which may or may not be from the same bag - so that probably explains it.


The one that's burnt actually has MORE light than the one that isn't.

Thanks =)