Yellow spots top on leaves. No bugs underneath the leaves.

I am currently at 30 days in to flowering in soil. I have these yellow spots on multiple leaves from different plants. I looked under the scope the leaves, but I did not find any bugs, spider, crawles, eggs… They are clean. Any idea, what are these spots?
I useing Plagron algae bloom and Green sensation, pH is 6,3.

The last pictures is under the scope.





View attachment 509940

sorry the secont picture is under the scope.

Without seeing the rest of the plant it's hard to tell.

However photo #3 show damage from mites or some insect that was eating the edge of those leaves. And there's a hole in one leaf that is made by a much larger insect.

My humble, barely educated viewpoint, is that these leaves are displaying "Senescence".

That is: the nutrients that once pulsed thru their green veins have been transferred to the flowers because the plant does not need that leaf (those leaves) function any longer.

This is normal during flowering. It will even seem to get worse as all yr big leaves give up the ghost, but your heads will be fine. You wait and see ...

^I agree. I too think it's just the start of fading.

It is true, on this plant i found one caterpillar, that i removed. Now there are no more eating leaves. I treat all the plants with neem. After 5 days, the leaves are still yellow and they are clear under. I hope it's just the beginning of feeding as says Teddybrae and Cvh.[FONT=&quot][/FONT]

goodforyou said:

It is true, on this plant i found one caterpillar, that i removed. Now there are no more eating leaves. I treat all the plants with neem. After 5 days, the leaves are still yellow and they are clear under. I hope it's just the beginning of feeding as says Teddybrae and Cvh.[FONT=&quot][/FONT]

Click to expand...

Insect damage can also create nutrient deficiencies.

Last year I had 2 plants that were attacked by aphids, and from a distance it looked like a perfect nitrogen deficiency - which rarely happens outside of late flowering.

Right now I'm making a very simple kombucha of cannabis leaves, sugar and water in a used alcohol bottle. The sugar (kane sugar, molasses could also work) encourages all kinds of (cannabis specific?) fungi and bacteria. I think it cleared up botrytis. Any old wine or bourbon bottle will do, fill to 1/3 with leaves, 1/10th of sugar and fill to the top to put all the leaves under the water, and keep the process anaerobic. Place in a dark warm environment. The kombucha is done when all the leaves have faded to a matte green. Pour off and filter into another container and store.

When done with fresh ingredients this should even be drinkable, however I'm not risking it.

Microbes are often the best way to deal with insects, because when poured with water, they get everywhere.

Thanks for your advice. I don’t know exactly what kenna sugar is, so I’ll use molasses. Otherwise, for fungal diseases I use natural herbal tea from mountain flowers such as black cumin (Nigella sativa), , common nettle (Urtica dioica), wormwood ([FONT=&quot]Artemisia absinthium[/FONT]arnica), arnica. It really works and it also boosts the immune system of plants

I meant cane sugar, which still has some molassis in it - basically for the extra micro-nutrients.

And thanks for the recipe. I'll try and use it - especially the stinging nettles, which have a lot of silica and micronutrients in them.