Yellow Spots

[van de zwaan]

Hi All,

 

Plants seem very healthy apart from a few random leaves with severe yellow spots. Im using coco/perlite/clayball media, ro water mixed to 1.6 EC with H&G A+B, Roots exellurator, Algen extract, Fulvic acid, Drip Clean. Plants are around 3 weeks old and are being fed 3 times a day at 1 minute feeds. Im pretty diligent on getting my ph down to 5.5 for the first feed but sometimes i miss it and it probably feeds around 6.1 - 6.3. Tested my run off today while flushing and came out straight away at 6.1.

 

Im using RTW by the way, plenty of ventillation and no temperature issues. 600w MH on top.

 

I ve got no idea what the spots are from. My ph range and EC all seem to be in order. Any ideas would be much appreciated.

[van de zwaan]

Still no replys eh,you guys must be as stumped as me.

[pisspotgrower]

Shit sorry bro, missed this 1

 

I to gorw coco n perlite

 

Me there im not 100% sure but really not looking to bad....

 

Check this From Want Da Chronic https://cannabis.community.forums.ozstoners.com/topic/9128-nutrient-problems-with-pictures/

 

Might be abit of a MAg deficiency or even radiant heat if this is happening on top aswell....Me here i would flush em out 3x ya pot size with a PH of 5.8......5.8 is where i keep my ph all the time:)

 

Than n good feed around a ppm of 700..give her a few days n see how she gos....

 

On the other side put ya hand under ya globe at plant level n just make sure she not abit hot....

 

Never fear well get ya there

[van de zwaan]

Thanks for the reply Pisspotgrower,

 

Those leaves all seem to be on the bottom half and none of the new growth is like that so im just gonna keep doing what im doing. They are looking beautiful at the moment - definately my best grow yet. Now just considering wether to push them over and put in my first layer of mesh or let them grow straight up and tie the branches down. Theres lots of different opinions out there about Scrog or Sog. Any opinions welcome. In fact im gonna start a new thread in another forum.

 

Cheers.

 

Van

[Psychonaut]

Yeah I think pisspot is on the right track, mag/cal deficiency which I think is related to nute lock out.

 

Maybe just need to add a little epsom salt, a teaspoon for 4ltr and cut back on the nutes, like 1/2 strength for a week.

[tokingtonto]

Hey, keep an eye on ph fluctuation, i find it wanders a lot using RO water.

also night time humidity levels around the plants, air flow through the plants keeps it fresh.