Yellow lower leaves with brown spots

[tilopa]

Growing little veg plants:

-coco and perlite (very airy mixture).
- Hydroponic Research Veg + Bloom per instructions.
- temp and humidity are solid

Been watering when the media is dry. Getting many lower leaves looking like this:

 

[tilopa]

Having trouble with attachments....

 

[Lester Beans]

Looks like there is leaf twist pointing to a pH issue.

Also looks like the feed is too hot. Starting to burn the leaves.

Flush, with 1/4 strength nutrients, significantly. Make sure the pH is around 6 for the flush fluid and in future waterings.

 

[gorilla ganja]

Another tip is to not let your coco mixture dry out. Should be keep moist. Like you said an airy mix, has plenty of air even when wet. When it drys out too much it causes PH swings which relates to what Lester was alluding to.

Hope this helps and may all your Buds be Huge.

Peace GG

 

[tilopa]

Thanks.
I forgot to list my ppm's and ph

PPM about 800
PH 5.8

Interesting that letting them dry increases causes ph swing.

I'll do a flush and then start them back with a little less ppm, though the manufacturer claims 800 is a safe level.

 

[tilopa]

Wouldn't nute burn cause the tips of the top leaves to turn brown?