Please help! 5 weeks into flowering plants droop turn yellow and die, every time.

Hi all, a few years ago I decided to grow in a greenhouse, before that I had great success indoor. I use the same system growing In coco, run to waste. Indoor I never had a problem at all. In the greenhouse my winter grows are great, but every year when I grow through the summer about week 5 in flower the plants start to droop is if they havnt been watered, then they start to turn yellow, the hairs die, and the plant dies within 2 weeks. The steams crack at the base of the plant.
The only thing that I different is that my res temps are higher about 27 degrees and so is the ambient temperature can get up to 35 in the summer months.
Any help will be much appreciated!

Try growing in soil next time. Try going organic. Your obviously doing something way wrong if the plants are dying. Maybe youre not leaching the coco enough...

A green house in summer can be tricky. I bet the humidity is way too high. You need a lot of air flow. Check into shade cloth instead of plastic to cover the green house in summer. I am building a new green house next year. My veggie garden stalls every year in july and august from the heat. I will use plastic in the spring, fall and winter but shade cloth in summer.

Do you have a lot of condensation on the inside of the plastic?

Alienwidow said:

Try growing in soil next time. Try going organic. Your obviously doing something way wrong if the plants are dying. Maybe youre not leaching the coco enough...

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all my grows indoor for the past 7 years are successful, and my greenhouse grows outside of summer are perfect, it has nothing to do with leaching out the coco, the only difference is my temps are way higher so it has to be something related to this, maybe a fungus infection etc

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SourLilly said:

all my grows indoor for the past 7 years are successful, and my greenhouse grows outside of summer are perfect, it has nothing to do with leaching out the coco, the only difference is my temps are way higher so it has to be something related to this, maybe a fungus infection etc

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I only put up my greenhouse film for a month or so. Keeps everything cooler. Sounds like you need more ventilation or something

Yes I do, every morning there is condensation on the roof, during the night the humidity is high, but during the day its usually under 50%

80f root temps a bit hot right? In certain cases you could get away with an 80f res, but not if your foliage temp is too high. You'll be lacking oxygen and the plant will not have a "cool" enough water uptake to help keep foliage stress down.

Ever seen plants take 110f weather outdoor? The only reason it can is because the root zone is kept cool.

Sounds like they are suffocating. Something is depriving your roots of o2.

just a suggestion, these plants die naturally. they turn yellow, the hairs change color, etc. is this just a natural death? if you don't put up pics along with more info on the grow, it's hard to say. maybe your temps are an issue as this doesn't sound good.