What is Wrong With Plant?

This plant is sick and I don't know why. I've looked on the web at pictures of the various deficiencies & infestations and nothing jumped out at me.

I usually grow in ProMix HP but thought I would give soil a try, here are the details.

The soil is Dark Matter super soil made by Destiny Organics. It is a 5 gallon pot, the bottom third filled with Dark Matter and the rest filled with a 50/50 mix of Dark Matter and ProMix HP.

The strain is Widow Bomb, a cross between White Widow and Bomb #1 from Bomb Seeds in the Netherlands. It was germinated in a Solo cup and transplanted at 3 weeks. When transplanted the plant looked great, quite healthy. This started happening about a week after transplant. The one fan leaf curled up in a day.

I have only been giving water with a bit of Cal Mag, 3 mils mixed in a 4 litre jug. PH of water was adjusted to 6.0. I also tested the soil PH, it came in at 6.0. Every 2 - 3 days I would give 1 cup of water.

The light is a Spider Farmer SF2000 and it is 18" above the plant. Tent temperature is about 25C and humidity 60%. It is a 18 on - 6 off schedule.

There are 2 plants in the tent both showing the same symptoms.

I would appreciate any insight you may have, thanks.

BTW, I was too lazy to change the date settings on the camera so these are not old pictures.

If the nutes and pH are correct, then light burn is a possibility. I think 18 is too close for this age with your light. Back it up to 24 because it won't hurt anything and might help new growth if light is the problem. The bad leaves aren't going to get better. Grow some new leaves and take it easy with the light for a while.

Shape Shifter said:

If the nutes and pH are correct, then light burn is a possibility. I think 18 is too close for this age with your light. Back it up to 24 because it won't hurt anything and might help new growth if light is the problem. The bad leaves aren't going to get better. Grow some new leaves and take it easy with the light for a while.

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Thanks, I'll raise the light another 6 inches.

One uncertainty is we don't know how super your diluted super soil is. You could have a nute deficiency because of too much photosynthesis. If the light was further away, less photosynthesis and less need for nutes.

Shape Shifter said:

One uncertainty is we don't know how super your diluted super soil is. You could have a nute deficiency because of too much photosynthesis. If the light was further away, less photosynthesis and less need for nutes.

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I was told where I bought the soil that it was too hot for transplanted seedlings. The owner of the store told me this was how he used it when he tried it. Said that all he gave was water right up to the 2nd week of flower.

The soil has the following ingredients:
- Coco Coir
- Peat Moss
- Worm Castings
- Perlite
- Class A Organic Compost (whatever Class A means)
- Alfalfa Meal
- Basalt Rock Dust
- Blood Meal
- Feather Meal
- Fishbone Meal
- Glacial Rock Dust
- Greensand
- Gypsum
- Insect Frass
- Kelp Meal
- Limestone Flour
- Mineralized Phosphate
- Oyster Shell Flour
- Potassium Sulfate
- Rock Phosphate

That's quite a list.

That's out of my league, dawg. I don't know anything about super soil. I stick with Promix and use nutes from day one to the end.

Shape Shifter said:

That's out of my league, dawg. I don't know anything about super soil. I stick with Promix and use nutes from day one to the end.

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Well this might be my one and only attempt at soil. My other 6 grows were all done with Promix and liquid nutes, they turned out good. I guess I should just stick to what I know.

I cut away all the affected parts of the leaves so it's all green again, I'll give it a bit more time to see if they recover. If not I'll dump everything out and go back to the Promix. 4 weeks of grow time down the drain if that happens but the show must go on.