What's up with this?

TurnUp said:

This is auto and i left it with the light on 3 days when i was gone...could this be the cause too?

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xwant2LeaRNx said:

Its hash making time bro!!! learn from your mistakes move on to the next one. we all make mistakes. i had to hash up 9 plants one time cause i was gone one day too long. its gut wrenching. speacially after 3 months of work. dont quit never!!!!!

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TurnUp said:

When you say hash do you mean bubble hash or hand maked hash?

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Dr. Who said:

Some are quite correct,,,HEAT was the problem.....Your temps are and were, way to high!
85F should be the upper limit.
I'll also bet that the canopy level "felt" heat was well over 95!
At around 85F your plant begins to shift from putting it's strength from growing, into attempting to stay cool to protect it's self.
It tries to do this by increasing transpiration. This robs the plant of energy it would otherwise use to continue growth.
At 90F the plant is pretty much dormant as far as any growth goes.

One way to detect this is increased water demand...Not the best way, but if you see this. You can increase to keep up with plant demands and that helps. The things to do are to increase space between the canopy and the the light (Put your hand out flat at canopy level,,,feel hot?) Move light up and add air flow across the plants if you have none. Add air conditioning to the room. This is by far the best solution for the long term.

Another sign of heat stress is something that I have seen called a Mg problem here....It is not and in reality does not resemble a Mg problem at all......"Limp, dying leaf edges" , and I do mean limp.....are the wake up call of advanced heat stress that IS going to turn into leaf damage , as these areas are going to turn brown and crispy....This will advance into the leaf, depending on the amount of heat exposure.

This browned leaf problem is now commonly mistaken for nutrient burn......

Some of the best FIRST signs of heat stress to look for are "canoeing"(The side "points" of the leaves are turning "up") and "cupping"(The whole leaf begins to curl "up" from the sides in) of leaves......as canoeing turns to cupping you are getting to the point where the above listed damage can happen....Canoeing point is the best time to adjust whats going on to prevent the forth coming problems if left untreated.

They can still finish out...But Jim is right....they will have a greatly reduced quality yield.

There is always a next time as you learn.....do not give up on those....you will get something to help you get to the end of your next grow.

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