Auto Blueberry (Dutch Passion) 6 weeks into grow - Nutrient problem?

Hi Guys,

I'm on my third grow now, as per the above title I have some auto blueberry on the go in order to make myself some cannabis oil.

I am 6 weeks into the grow and there seems to be a problem developing, I have attached pictures.

I have been through mag/nitrogen deficiency before and I don't think that is the cause this time.

Plants are in 15l pots and I'm growing in a soil/perlite mix (heavy on the perlite) and using organic Biosevia grow and bloom ferts. I have also been dosing cal/mag for the first few weeks to prevent cal/mag deficiency.

Admitedly I think the problem may be that every watering I have given them has contained nutrients/small amounts of cal mag.

I think it's either nutrient lockout/manganese. I use rainwater that is kept in a vat constantly airated incidently.

Any advice on this is greatly appreciated, currently it's mostly upper leaves affected, with some lower ones suffering the same. Each plant only has a few leaves affected like this.

picture 1 and 3 look like the leaves the regular plant gets in flowering. the blueberry from dutch passion gets reddish purple leaves. are they just colored or are the burnt/dead?

You raise a good point....I forgot about that! Well as you can see from the 4th pic, that leaf is dieing/drying out, so I'm really not sure what the cause is!

I'd also like to add that they are still growing nicely!

My BB auto from DP did the same with the leaves turning a red/blueish hue during late flowering, Mr. Ghetto is correct though, it would appear that you've burnt her a tad. Lay off the nutes for a minute. Flush w/ clean water and some Sledgehammer or Microbebrew if you got it.

The Blueberry strain is known to be a light feeder too. I agree, looks like some nute burn there. I'd flush and cut back your ppm by 1/3.

Many thanks guys!

How does nute burn come about when most of the feed i've been using is organic? I have flushed some of the plants through, but those which aren't affected as bad I've simply watered with plain water and will do so once more when they next need watering.

Thanks again all!

Hi Guys,

This appears to be getting slightly worse over the past day or so, do you think there is anything else I should be doing?

Just flush and hive it time it should help. Im waiting on the same beans any tips? Hope it works out for you good luck.

Blueberry are notoriously picky.