Any ideas what this is?

[doobydoobydo]

All the other 6 plants are fine and healthy, they have all had the same treatment. The last time i watered, with biobizz grow i gave this one plain water. Is it worth carrying on?
Cheers
A

 

[namvet25]

Have you used any cal/mag? I would remove those skinny bottom branches and yellow leaves then flush her with plain water,then feed her some cal/mag with a dose of nitrogen and see if that helps.If your using chemical nutes make sure you ph your water.You may also want to check leaves and soil for any bugs.

 

[doobydoobydo]

Thank You, i am using biobizz nutes. All the other 6 plants are fine and healthy? Is it possible to sometimes get a
"Rogue" seed ?

Is Cal Mag somethingni should put in with the nutes on all my plants?
Cheers
A

 

[Grim Reefer]

Hi doooby,

When growing auto-flowers Cal/Mg is a must. You need to start adding it the the nutrient solution from weeks 4 onward usually. How crowded is it in your grow space? If this is one is the only one affected maybe she isnt getting enough light.

 

[Grim Reefer]

Hi doooby,

When growing auto-flowers Cal/Mg is a must. You need to start adding it the the nutrient solution from weeks 4 onward usually. How crowded is it in your grow space? If this is one is the only one affected maybe she isnt getting enough light.

 

[doobydoobydo]

Thank you, i got some cal mag today and gave that plant a litre of water with 1 mill, i will add it with the biobizz nutes from now on to all the others, today is 5 weeks.
The dodgy plant is in exactly the same situation as the others? Maybe a rogue seed?
Cheers
A

 

[Waira]

--doob, this isn't a genetics thing,.. she look like she's tapping into the fans pretty heavy, not uncommon with Biobizz nutes, as they are rather mild,... get me better close-up shots of affected leaves too please, for better diagnosis,... might be other defc.'s starting too, but I can't quite tell in these pics,... a pH check is in order too!

 

[doobydoobydo]

Here is a leaf from yesterday, i just checked and even the top of the plant is beginning to to discolour, will get the whole plant and photograph later today.
Cheers
A

 

[Greensleeves]

Looks like a potassium issue to me, but I'd wait to hear from someone with more knowledge.

 

[doobydoobydo]

This is the plant this morning. I gave it some cal mag last night not sure how long that takes before the plant takes it up?
Cheers
A