Leaves turning yellow fast and some going a rusty color - Help

[StewPot]

Hi, I need some help with an issue that has just appeared today. Plants where going great yesterday but came home from work to find them like this. The bottom leaves are turning yellow and some of the leaves are turning a rusty color. One of these plants is an auto but am not sure which one as the labels fell out, the other 3 are ak47 and cookies and cream. Not sure if this is insect related or not. They are in Canna Terra Pro and are being fed Grow Research all purpose GROW formula daily in the morning. Right now they are outside but am just waiting the the aircon people to come and install on in the garage so i can setup my tent.

 

Any help would be greatly appreciated.

 

Cheers

Edited December 16, 2016 by StewPot

[billygoat]

Whole plant pics ?

[Carnage]

I've had that one before

trying to remember what it was from

[Carnage]

one possibility is you added too much cal/mag and got a nutrient lockout.

cant really help you with anything else.

unless you just added way too much fertilisers and got a lockout ?

but it looks similar to a lockout caused by excess cal/mag.

[OldManDallas]

When you rub it dose it come off on your finger like a powder?

 

Might be Rust Fungi..

[sunshineoldfeller]

I agree with Carnage.  there's an excess of nutrient or cal/mag.  FLUSH like crazy ... like ... put a hose on a healthy dribble and leave it in the pot overnight.  good luck!

Edited December 16, 2016 by sunshineoldfeller

[StewPot]

 I have pulled the yellow leaves of as well as most of the rusty ones incase it is insect related. I have added more pics. I have only ever used half strength feeds in the morning and they have been going great till tonight. I will flush like you say and see what happens.

 

Thanks

[Carnage]

pots too small for a start, good growth for those sized pots.

i would say more likely a phosphorous deficency now

[StewPot]

Of to the hydro shop first thing to get bigger pots and some phosphorus. Thanks

 

Sent from my SM-G930F using OZ Stoners mobile app

[Carnage]

I'd be more likely to get a different fertiliser

 

and get some good medium

 

and some bigger pots