Plants leaves turning white from the lower leaves up

Hey guys ,
I have 3 8/9 week old pow 33's from ch9 , There growing in a polytunnel which has been quite hot for the past week and a half due to a heat wave . The leaves originally started going yellowish with brown dots but now they have nearly gone totally white .Im giving them hesi tnt complexe and there also in boi biz light mix .Has anyone else seen these kind of symptoms ? Kind of getting worried now !








Leaves about a week ago .

Nitrogen deficiency

slim83 said:

Nitrogen deficiency

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Thanks i just re potted them there and im going give them some nutes + urine , hopefully it will work !

awhir said:

Thanks i just re potted them there and im going give them some nutes + urine , hopefully it will work !

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I have a feeling you are going to burn your plants, but good luck.

You need to get a quality fert. like Jacks dynamic duo(google it). I think your "Pissing" your plants off.

Thanks for the advice guys , The urine didn't seem to burn the plants but the Deficiency is still contuining and now the other 2 plants are starting to show signs also , It starts off on the bottom big leaves and moves its way up .. Im using hesi TNT Complex and it contains : NPK 3:2:3 with magnesium, calcium, manganese, copper, zinc etc as trace elements ..So the plant should be getting most of its required nutrients from that .I uploaded some more pic's :