Why are my leaves curling into straws?

What are my plants trying to tell me?

2 plants in ten gallon fabric grow bags.
4'x4' tent
Fox Farm Tiger Bloom (pH balanced after mixing with dechlorinated tap water [lots of pH up])
I put in CalMag every watering
I will do a feeding with Tiger Bloom then a watering with CalMag
30 days into flower.

The past week I have increased Tiger Bloom to heavy feedings.

With these last two waterings, I fed them Tiger Bloom, then gave them CalMag and Big Bloom, instead of CalMag and water. Could they be getting lockout from too much Nutrients? I just bought Big Bloom yesterday. Should I be giving the Big Bloom with the Tiger Bloom mixed together?

There is a lot online about why the leave tips curl but I cannot find anything on why they "straw up". If you have any insight on what the leaves are telling me please drop a comment so I can correct it asap.

Pictures are current and taken earlier today.

it looks like wind burn, how much air do you have moving across your plants?

Roger A. Shrubber said:

it looks like wind burn, how much air do you have moving across your plants?

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Yes. I have 2 - 11" Honeywell Oscillating tornado fans. I will turn them down and see how that does.

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Looks like canoeing due to heat. Whats the temp at canopy level and is it the top leaves canoeing?

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aim one or both at the walls of your tent, don't have them blowing directly at your plants, the "splash" from the fan blowing at the tent wall will be plenty for your plants. and hobbes ^ may have a point as well, if you can't keep your hand under the light at the same distance as your plant for a couple of minutes, without feeling discomfort, then your light may be too close, and.... the temp in the entire room may be too high. it would be a good idea to buy a half way decent laser thermometer and check the temp of the leaves that are curling, if they're over 82-83 degrees, you want to cool it down till they're about there

Hobbes said:

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Looks like canoeing due to heat. Whats the temp at canopy level and is it the top leaves canoeing?

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The leaves that are canoeing are in a 2' x 2' area in the middle, on top, just under the trellis net basically (the heaviest canoeing is directly in the middle of the canopy). Most of the leaves in the tent looks good. Just started noticing these leaves curling today.

It feels pretty comfortable with my hand across the canopy. I laid my hydrometer on the trellis net and after about 45 minutes it was reading 86.7°F or 30.4°C and 51.4% RH. I also have a 6" inline fan with carbon filter plus two 11" Honeywell fans I keep oscillating on the bottom.

I'm using 2 - Viparspectra V900 (blurple reflector series) rated 390w each. They are 16"-18" above the canopy. According to Viparspectra the V900 has PAR of 936 at 18".

Roger A. Shrubber said:

aim one or both at the walls of your tent, don't have them blowing directly at your plants, the "splash" from the fan blowing at the tent wall will be plenty for your plants. and hobbes ^ may have a point as well, if you can't keep your hand under the light at the same distance as your plant for a couple of minutes, without feeling discomfort, then your light may be too close, and.... the temp in the entire room may be too high. it would be a good idea to buy a half way decent laser thermometer and check the temp of the leaves that are curling, if they're over 82-83 degrees, you want to cool it down till they're about there

Click to expand...

Alright. I will definitely adjust the fans away from directly blowing on them while still circulating the air.

Man, I know you did a good job filling out that tent