New to this...should I be concerned?(pic)

Hey I just got my mmj card and set up to grow so I am very new to this and I am concerned about what my 3 s. diesels are doing. All 3 look the same. No other plant in my room looks even close to this. I'm using canna coco with the canna line of products. I'm growing in smart pots. I water when I feel the pots about as light as a pot with just coco no water. The plants are under a 1000hps enclosed light at "24 above with inline ducting and fans to cool. Room temp is a steady 76 degrees and 37% humidity at almost all times. I also have ample fresh air supply from the outside into my room. Any thoughts or help would GREATLY be appreciated.

it looks to me that you burnt them with too much nutes. they look way beyond recovery

The plant are only 10 days old and were given nutes last 5 days ago. The nutes given were given according to the directions. Think I still burned them? Keep in mind this is only 3 out of 18 plants I have and the only 3 sour diesels. I have given them all the same water, nutes lighting etc. I'm bummed out I might loose this strain. :(

......also they are still growing and pumping out new branches. THey are actually growing tall rather quickly...just all of the new growth starts this upward curl about 2 days after they show themselves...

Can't be bummed about losing a strain that doesn't fit your growing style :thumbsup: Maybe they are a little more sensitive than the others, and maybe culling them now is a good thing. Not every strain suits every grower:jointsmile:

good point, just not a fan of failing ;) plus I enjoy that strain very much...lol

That my friend, looks like white powder mold. When it gets real bad it will curl the leaves. I have found that it likes some strains more than others. Diesel is one that I have the most WPM trouble with.

that looks just like the 3 of my plants except they are only 10 days old...any chance to salvage, or any good remedies? Do I have to worry about my other plants? How does one get this? and how can I prevent it? also it looks like your leaves are curling down? mine are going up and folding in half like tacos...are still talking about the same problem?

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I water when I feel the pots about as light as a pot with just coco no water.

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That's a problem. Coco is a hydroponic medium. You can't let it dry out between waterings like you (must) do with soil. Even when it seems "saturated" coco holds enough air to maintain healthy roots. You can water every day. Some folks do it twice a day.

If you've parched your roots, the damage may be irreparable. Are your other plants in coco as well?

If indoors get rid of them. Fast. Check leaf bottoms. WPM can go through a room like shit through a goose. Some strains are more resistant than others. The plant I showed had more WPM on the bottoms of the leaves so they curl down. Carefully check your other plants. A faint dusting of white powder is all you need to see.

Go into Plant Problems and look for White Powder Mold. You are not the first to deal with this.