little brown spots all over leaves

My plant has developed little brown spots all over the leaves since this morning.

It is in the second week of flowering and is growing outside in southern africa.





The tips of the leaves are starting to curl upwards since these photos were taken this afternoon.

Here are some more pictures taken through a microscope

IMHO, It looks like the beginning of nute burn

Actually it looks more like a phosphorous deficiency to me, during flower.

There's a FAQ thread here you can use to diagnose your plants: https://www.rollitup.org/marijuana-plant-problems/157345-have-plant-problem-check-here.html

Check it out..

-S

i think you might have an Mg deficiency, have you been giving your plant any micronutrients?

calcium deff, or you sprayed something on them that burn them, water can do it if temps are high

additional info would help though

WOW if he listens to us he's got nute burn, a phosphorus deficiency, a calcium deficiency, and a magnesium deficiency.
Sweet. I'll just say its a zinc deficiency to add another confusing variable.

Another Realm said:

WOW if he listens to us he's got nute burn, a phosphorus deficiency, a calcium deficiency, and a magnesium deficiency.
Sweet. I'll just say its a zinc deficiency to add another confusing variable.

Click to expand...

Looks like plant AIDS to me. lol

Thank you all for your input. I appreciate it's hard to diagnose things like this using just photos.

The fertiliser used was 16-46-9 if it helps.

What other information can I give to help you?

It hasn't been sprayed with anything recently.

Watering is applied directly to the soil, so no splashing on leaves.

This plant is growing outside in southern africa, so it does get rained on, but the raindrops are big.

It is extremely hard to diagnose... From looking at the pics, I would say check around the plant and underneath the leaves for bugs... (thats my opinion!)