Hi guys im growing ww in organics im using worm castings and bat guano and volcanic rock dust fertilizer and organic compost my plant is in two weeks of flowering and ive noticed like a burn on the tip of leaves and along the sides of the leaves i have looked it up and it said i may have a potassium deficiency what do u guys think
Yup that looks like light potassium deficiency, adding 1/2-1 tablespoon molasses to a weekly feeding should help balance it
Thanks i thought i was right
Also, do you have fans blowing directly on the leaves? The upturned serrated edges say there is wind burn/damage. Possible to also,cause the edges tomturn brown after a while
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Yah i have four fans blowing the air around
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Are they hitting the leaves? You should only have the leaves gently wiggle or sway. Point fans above canopy (I point mine at the lights and it helps to cool them a little… and below pointed parallel to,the floor near the floor, @Aussie_autos but keep an eye out to make sure the leaves aren’t being hit too much. I grow some outdoors and after a few windy days, my leaves end up looking just like yours, turned up edges and browning from being damaged
You can google wind burn on cannabis and see the pics
I will it fix it up ,ive moved them so now there not blowing on the plant Uploading: IMG_20211016_161153.jpg…
Processing: IMG_20211016_161144.jpg…
I have them blowing on to the tent walls the plant is moving slightly
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Check input and runoff ph levels, your in coco correct? Leaves on interior appear sunken in with a low curl to edges all around. It makes them look like they have an outline around them makes me second guess it’s a straight forward deficiency and actually an underlying issue
Im growing organically so im only using worm castings and bat guano and volcanic rock dust fertilizer and organic compost so i didnt think there was any need to keep ppm that is coming out my ph water when goin in the pot is at 6.8
What are you growing in? Worm castings as media?
That organic stuff is beyond me tbh, thought I’d seen some coco on the floor is why I asked…
No sorry im in coco with peat moss and perlite with worm castings and bat guano and organic compost and volcanic rock dust fertilizer mixed in
There are two kinds of bat guano: insectivore and herbivore. The insectivore is N heavy and the fruit bats are heavy in P and K which is what you want.
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You could also use Peruvian sea bird guano for your N- not helpful atm but 
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I think its from fruit bats in Australia and soon i will have superworm frass aswell
Honestly, I think moving the fans will help a lot!
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