HELP NEEDED SICK PLANT

[The Gambler 1]

Hi folks

 

I was wondering if anyone could diagnose what is going on to the leaves in the pictures. The older lower and middle fan leaves are yellowing and have blotches on them, Magnesium Def?? Plant is a NL auto, at week 9, outdoor poly tunnel grow in soil. I've been feeding Biobizz nutes, Fish Mix and Bloom, slowly building the Bloom to 3ml per litre, Fish Mix at 1ml per litre throughout grow. I'm in Scotland so my temps aren't the best, has dropped quite low to around 8 degrees C during some nights. My PH going in has been between 6.4 and 6.8, and the run off seems to be the same, so I don't think it's a PH issue. Any help and advice welcome please.

 

Thanks 

 

[Shumroom 24,555]

Welcome to uk420 @The Gambler

 

If your temps are getting down that low, I'd get a heater in there on a thermostat to keep them from getting any worse. 

 

It looks like a deficiency, probably brought about due to your chilly temps(low temperature lock out). 

 

But I don't grow outdoors, some outdoor peeps might have other ideas. 

 

Best of luck with the rest of the grow mate 

Edited July 25, 2020 by Shumroom
Eta

[Inspiration101 10,764]

I have been biobizz growing for years, just switching over to intense nutrients now due to the deficiencies when using biobizz range.

 

Add some grow, give it 2ml per litre of water.  Also add some trace nutrients from canna if you arent 100% organic growing. 

 

Hoping to bypass this annoying mid flower leaf deficiency showing problem by going intense nutrients organix range

Edited July 25, 2020 by Inspiration101

[Bayleaf 1,193]

Don't pH in soil.

[Bartyfartblast 1,836]

My money is on low temp lock out .  You need to get some heat to them or they will not grow much more including the buds  , so youre taking a big risk for little smoke at the mo . 

[The Gambler 1]

1 hour ago, Shumroom said:

Welcome to uk420 @The Gambler

 

If your temps are getting down that low, I'd get a heater in there on a thermostat to keep them from getting any worse. 

 

It looks like a deficiency, probably brought about due to your chilly temps(low temperature lock out). 

 

But I don't grow outdoors, some outdoor peeps might have other ideas. 

 

Best of luck with the rest of the grow mate 

Thanks buddy, yeah I'll be putting a heater in next time, had a rubbish summer so far! But we dont get balmy temps up here anyway. 

I've got hold of some Cal Mag, so will see if that helps.

[The Gambler 1]

1 hour ago, Inspiration101 said:

I have been biobizz growing for years, just switching over to intense nutrients now due to the deficiencies when using biobizz range.

 

Add some grow, give it 2ml per litre of water.  Also add some trace nutrients from canna if you arent 100% organic growing. 

 

Hoping to bypass this annoying mid flower leaf deficiency showing problem by going intense nutrients organix range

First time grow, thought I'd try biobizz. Added some Cal Mag to see if that helps

[The Gambler 1]

6 minutes ago, Bartyfartblast said:

My money is on low temp lock out .  You need to get some heat to them or they will not grow much more including the buds  , so youre taking a big risk for little smoke at the mo . 

Yeah that's what I'm learning towards, temps are ok during the day, but it drops low at night. I'll see if I can put a heater in there on a thermostat.

[Bartyfartblast 1,836]

6 minutes ago, The Gambler said:

Yeah that's what I'm learning towards, temps are ok during the day, but it drops low at night. I'll see if I can put a heater in there on a thermostat.

 

Try heater matts , they will help to keep the roots at a better temp.

[Guest icki]

Id plant it in the ground..