Rust spots over leaves,pls help.

[ProtoPipe]

View attachment 297867View attachment 297866View attachment 297865View attachment 297864View attachment 297863Hello,I've got this Great White Shark under a GN006 led.
Its 7weeks old,12/12 from seed,its a fem reg in soil,using Plant Magic
OT bloom @ 1.5ml/ltr as you can see its full of rust spots and I don't know
what it is or what tView attachment 297862o do about it,can someone throw some light on this
problem for me please,I have 3 other different strains in the same groom
and their ok.
Cheers PP

View attachment 297861Can a mod please explain why my pics are always shuffled
around after uploading..............:no:

 

[namvet25]

Didn't you give her veg time before you went 12/12? Rust spots are usually from cal-mag deficiency.What are the NPK numbers of your nutes and how often and what dose are you giving them? Looks like she could also need some more phos and potassium.You have to upload all your pictures before you start typing.

 

[ProtoPipe]

Didn't you give her veg time before you went 12/12? Rust spots are usually from cal-mag deficiency.What are the NPK numbers of your nutes and how often and what dose are you giving them? Looks like she could also need some more phos and potassium.You have to upload all your pictures before you start typing.

She was on 24/0 for 7 days b4 goin' 12/12.
The nute make up says 3-5-4.
They get fed between 1.5-2.0ml/ltr usually lasting 2 days b4 another feed.Being real careful with these nutes as full dose tastes shite and don't burn too good.
ps,thanks for the upload tip namvet.

 

[ProtoPipe]

OK,so according to 'grow shop guy' its a potassium prob possibly caused by magnesium in the water locking it out.Another shop said pretty much the same only wanted to sell me sommat to 'sort' it.
Original 'grow shop guy' said,nah don't bother,you can't save the leaves so just carry on....bud will be fine.

They offer a service where they send off a sample of your tap water to,'tap water guy',who analyses it,sends you a report and then can make up 'grow,bloom and boost feeds to suit your area,sounds like a good
idea,slightly pricier than shop bought but tailor made so to speak.

 

[DABaracuss]

We who grow with LED see the cal/mag problem all the time..I give a lil cal/mag= every feed."smile"

 

[briman]

WORD DA!!! I had to use 20ml. of cal/mag per 5 gallons of feed water every 2 days with my last grow. If I didn't, my ladies would show rust spots a day later! Wish a nute company would tailor that sh*t in to a NPK for LED!!! I went through almost a whole small bottle of the botanicare plus this last grow, but I had some big pots and plants too. Hope you get it worked out Proto!!

 

[A4]

Wish a nute company would tailor that sh*t in to a NPK for LED!!!

I have been hammering nutrient companies the last 3 months on this. Believe it or not, most are absolutely unaware of the deficiencies when using LED lighting. Either that or they don't won't to reformulate. I am working on getting information in the hands of the correct people, until then it is something the LED growers will have to overcome manually.

 

[ProtoPipe]

WORD DA!!! I had to use 20ml. of cal/mag per 5 gallons of feed water every 2 days with my last grow. If I didn't, my ladies would show rust spots a day later! Wish a nute company would tailor that sh*t in to a NPK for LED!!! I went through almost a whole small bottle of the botanicare plus this last grow, but I had some big pots and plants too. Hope you get it worked out Proto!!

I'm just gonna let them finnish and see what happens,thanks though........
PP

 

[Bromeo]

We who grow with LED see the cal/mag problem all the time..I give a lil cal/mag= every feed."smile"

Main reason I've began adding gypsum to my coco. To cut down on the need for so much Cal/mag. And its working

 

[ProtoPipe]

Main reason I've began adding gypsum to my coco. To cut down on the need for so much Cal/mag. And its working

I noticed a few reply's to this post mention cal/mag def which I understand can be common with auto's under led,but I was told my
problem was Pottasium based due to possible larger amounts of Mag in the water.
Any thoughts regarding this?