What caused this?

I seen in a couple articles that full darkness is good for your plants. So, I gave them a full dark cycle and when I checked on them, they looked like this. Before the dark cycle, they were a beautiful healthy color. Any idea what it is?

How long of a dark cycle did you give?

lime73 said:

How long of a dark cycle did you give?

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A full 24hrs

I dont think 24 hrs of darkness would do That to a healthy plant ??? I think something else is going on here.

Can you give us specific details about everything about you grow, more info you give the better we can advise.

Medium, temp, humidity, water ec,ph , fans , exhaust, water your using, ec, ph? Nutrients. Water feed schedule, more info you provide, the better!
Etc etc etc...

20gal pots with Fox Farms Happy Frog
86F lights on, 78-76F lights off
Humidity about 48%
6.6ph tap water (every other watering with molasses) When bottom of pots are almost dry
12in fan
Exhaust vented outside with 6in exhaust fan
Organic nutrients (Dr. Earth all purpose, Blood meal, Fish bone meal, urea, Bone meal, earthworm castings)
I did spray them with organic neem oil as I had some pests right before the dark cycle ( double the ratio of oil:water) but I’ve done it before with that ratio, no bad outcome

lime73 said:

dont think 24 hrs of darkness would do That to a healthy plant ???

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you are right, even 48h doesnt do that...

hmm have the leaves always looked weak like that?

Why did you spray with a double dose of neem oil?

it looks like all your new growth is coming out dead???
then your plants all will die... You need to flush with pHed soft water

HighLifeCannabis said:

Organic nutrients (Dr. Earth all purpose, Blood meal, Fish bone meal, urea, Bone meal, earthworm castings)

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these tiny plants couldnt have possibly leeched all nutes out of these huge pouches, the leaves are dark enough... have they been yellow before you started to give these nutes?

Kassiopeija said:

you are right, even 48h doesnt do that...

hmm have the leaves always looked weak like that?

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Nope. They were perfectly healthy.

lime73 said:

Why did you spray with a double dose of neem oil?

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Early signs of spider mites

Kassiopeija said:

it looks like all your new growth is coming out dead???
then your plants all will die... You need to flush with pHed soft water


these tiny plants couldnt have possibly leeched all nutes out of these huge pouches, the leaves are dark enough... have they been yellow before you started to give these nutes?

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A bit. Every time it looked like nitrogen deficiency, I fed them and they seemed to like it. Last feeding before flower was last sunday

I like to stay positive but the plants dont look great tbh. A bit lanky and weak and lacking in leaves. Did you just do a heavy defol? What's your light situation? It's quite warm in there - could you cool it down?

Roots are probably suffocated.
Those pots look drenched.
Not saying that's the issue, could be.
I'd let em dry out for a few days and see if they try to make a comeback.

Greenthumblady said:

The plants dont looks great tbh. What's your light situation? It's quite warm in there - could you cool it down?

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I run a KingLED 1000w. I usually ran it at 20/4 but turned it off for flower. Flipped to 12/12 . Always had it in that temp range. I can run a bit more cold air in there, sure

Greenthumblady said:

I like to stay positive but the plants dont look great tbh. A bit lanky and weak and lacking in leaves. Did you just do a heavy defol? What's your light situation? It's quite warm in there - could you cool it down?

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I had defoliated them prior

What's that log doing in there?

Next time I would get the mites under control before flipping to flower. I like having everything in line before making that switch. Do you have fans? A bit more of a draft may help with the weak stems and spider mites.
So odd. I've left plants 48 hrs dark bone dry for harvest that showed less damage.
@Merkn4aSquirtn is likely on to something with the overwatering too so let them dry right up and hopefully some will rally.

Could also be too much neem spray made it into the medium

Greenthumblady said:

Next time I would get the mites under control before flipping to flower. I like having everything in line before making that switch. Do you have fans? A bit more of a draft may help with the weak stems and spider mites.
So odd. I've left plants 48 hrs dark bone dry for harvest that showed less damage.
@Merkn4aSquirtn is likely on to something with the overwatering too so let them dry right up and hopefully some will rally.

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Yeah they showed up as soon as I was flipping. I have 2 fans, yes. I’m going to let them dry and see. Some look good, but 2 look really bad.

spliffendz said:

What's that log doing in there?

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it's the final resort when

Greenthumblady said:

the mites

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come back and back XD