Unknown Problems, need help (pictures)

[zelth]

I have 6 two and a half week old plants growing under a 400W MH light, 3 of them look amazing, but the other 3 seem to have completely different sets of problems each. The first two pictures are of the worst looking plant, the leaves are deformed, crinkled, and yellow, and the entire stem is purple. The next picture is similar to the first plant, without the crinkled, deformed leaves, but just as yellow and purple. The fourth plant was fine until earlier today, when I discovered some slight yellowing on the bottom leaves and the other leaves are drooping a bit. The last picture is of one of my healthy plants, to use as a comparison.

As for nutes, I have dosed them all twice with 1/4 diluted Jack's Classic All Purpose 20-20-20 over the last week, but that was after the first two plants started turning yellow.

Can anyone help me out? I've read plenty of plant problem guides and I still can't quite tell what it is.

 

[lampshade]

I have 6 two and a half week old plants growing under a 400W MH light, 3 of them look amazing, but the other 3 seem to have completely different sets of problems each. The first two pictures are of the worst looking plant, the leaves are deformed, crinkled, and yellow, and the entire stem is purple. The next picture is similar to the first plant, without the crinkled, deformed leaves, but just as yellow and purple. The fourth plant was fine until earlier today, when I discovered some slight yellowing on the bottom leaves and the other leaves are drooping a bit. The last picture is of one of my healthy plants, to use as a comparison.

As for nutes, I have dosed them all twice with 1/4 diluted Jack's Classic All Purpose 20-20-20 over the last week, but that was after the first two plants started turning yellow.

Can anyone help me out? I've read plenty of plant problem guides and I still can't quite tell what it is.

They look over watered. When you water do you saturate the soil, and then wait for the soil to dry thoroughly before watering again?

 

[zelth]

They look over watered. When you water do you saturate the soil, and then wait for the soil to dry thoroughly before watering again?

I usually water every few days, after the soil is dry, but this week I started adding nutes so that might be the case with the plant in the fourth picture. But that doesn't explain why the first two plants started looking so bad before that, especially since those were the 2 directly under the light and stayed dry much longer than the others.

 

[lampshade]

I usually water every few days, after the soil is dry, but this week I started adding nutes so that might be the case with the plant in the fourth picture. But that doesn't explain why the first two plants started looking so bad before that, especially since those were the 2 directly under the light and stayed dry much longer than the others.

When you water do you water thoroughly, does water run out of the bottom? Also how far is that light from it, and is it above 80 degrees in the room?

 

[zelth]

When you water do you water thoroughly, does water run out of the bottom? Also how far is that light from it, and is it above 80 degrees in the room?

It doesn't really run out the bottom, no, but that's just me trying not to overwater them. I can start adding more water less often if that would be better.

I don't have a thermometer for my room yet, but it's well ventilated and probably stays around 80-85 degrees, if not a little cooler.

 

[lampshade]

It doesn't really run out the bottom, no, but that's just me trying not to overwater them. I can start adding more water less often if that would be better.

I don't have a thermometer for my room yet, but it's well ventilated and probably stays around 80-85 degrees, if not a little cooler.

Overwatering is not giving them too much water at once.
Overwatering is when you give it to it too frequently.
Water just like the rain cycle, so get 10-20% runoff when you water.

 

[lampshade]

Overwatering is not giving them too much water at once.
Overwatering is when you give it to it too frequently.
Water just like the rain cycle, so get 10-20% runoff when you water.

Also when using ferts, go 1/4 strength, and use plain water inbetween waterings. So fertilize, then water, etc, etc.