Leaves curling and cracking, some yellow, please help!

Hey guys, working on my first grow. I'm in week 3 of veg now about to start week 4. Everything was going great and a couple of days ago I decided to give them a little more nutrients than what they might be used to.. I've been using nectar for the gods nutes. Either way, I've got some curling leaves growing that seems to look healthy, just kinda upside down, and also the leaves started turning yellow all of a sudden. They're even cracking on the blue mystic. I also have one sativa dominant that I truly feel sorry for.. it's been struggling since the beginning. I've included some pics and honestly my temps are looking out of whack, I've been trying to control it the best I can but it's just odd how the plants are just now showing problems.. they've looked beautiful until now. Thanks guys and I hope you have some advice

Classic over fertilization aka NUTE BURN. Back off the nutes. Plain water only. What soil? Did you at least mix the nutes half strength at a maximum? Preferably 1/4 at that size if in good soil if any at this stage.
You could probably toss a piece of bacon on top of those plants and it might cook as hot as the soil they're in.

Just joking but man. Stop feeding for now.

Good luck. Hope you get everything sorted out.

Plain water is your friend.

xtsho said:

Classic over fertilization aka NUTE BURN. Back off the nutes. Plain water only. What soil? Did you at least mix the nutes half strength at a maximum? Preferably 1/4 at that size if in good soil if any at this stage.
You could probably toss a piece of bacon on top of those plants and it might cook as hot as the soil they're in.

Just joking but man. Stop feeding for now.

Good luck. Hope you get everything sorted out.

Plain water is your friend.

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Thanks for the helpful words my friend. I had fed them about three times at about 1/4 to 1/2 strength of what the bottle suggests. I was doing it every other watering.. the last feed I did, I decided to go full strength, so thanks for easing my concerns. I was worried it might be something else but was quite positive nute burn would be the only possible option. I've already watered them once since the last nute feed with plain water so I'll contribute down that path until I see some recovery. Any idea how long they might take to recover and will those pretty leaves ever fix themselves?? Thanks @xtsho for the help my friend I can't thank you enough

PSlacks said:

Thanks for the helpful words my friend. I had fed them about three times at about 1/4 to 1/2 strength of what the bottle suggests. I was doing it every other watering.. the last feed I did, I decided to go full strength, so thanks for easing my concerns. I was worried it might be something else but was quite positive nute burn would be the only possible option. I've already watered them once since the last nute feed with plain water so I'll contribute down that path until I see some recovery. Any idea how long they might take to recover and will those pretty leaves ever fix themselves?? Thanks @xtsho for the help my friend I can't thank you enough

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Those leaves will not recover. In fact they'll likely get worse and die off. The thing to look at is the new growth. Leave those girls alone for awhile with nothing but plain water. At least a couple weeks. At least they're still in veg. Over fertilize in flower and you'll mess up your harvest and have poor yields and crappy pot. These can be saved no problem.

xtsho said:

Those leaves will not recover. In fact they'll likely get worse and die off. The thing to look at is the new growth. Leave those girls alone for awhile with nothing but plain water. At least a couple weeks. At least they're still in veg. Over fertilize in flower and you'll mess up your harvest and have poor yields and crappy pot. These can be saved no problem.

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Whew.. What a relief to hear.. I was worried I might have screws the pooch on this one. This is a learning process and I'll just have to write this one off in the books as a lesson learned. Quite sad to hear that those pretty leafs will die off though.. should've seen how pretty they were this time last week! Thanks for all the help @xtsho and I'll keep on the plain water for awhile