Need help please!!!

Not sure what the deal here is? any help?? in flower looks like rust all over the leaves.

looks like your grow is almost over.

Got any details to help us out? Like temp, humidity, feeding shedule?

mineral deficiency?

What kind of soil are you using?

slk said:

looks like your grow is almost over.

Click to expand...

I concur. How many weeks are you along in flowering?

looks like their ripening to me

They are on there fifth week. I am using a local nursery's soil. I am using a RO system. I add cal mag, plus my normal nuts.. My thought was it was some PH deal, but I check my PH everytime. I am using a large pot, larger then I have ever used. Its a 18 gal pot. maybe it is having some sort of nutrient build up???? So I flushed yesterday. I put around ten gal of water through each, I read your supposed to put two times the amount of soil. I was thinking 36 gal in each pot might have been a little excesive.??? any thoughts???

Here is two more pics.. Its got the spots on the large fan leaves and on the small ones on the buds?

temp is always fine, got fans and an AC. never gets over 80, humidity is 40%, I have a dehu. because of the larger pots I water about every 3rd day.

When you are growing cannabis in larger pots you do need to keep an eye on how much nutrient you are feeding them. Being that they are in larger pots means a larger root area and that means a lot more nutrient is being used because you are literally feeding them more water/nutes when you do feed them. For example when I am growing in 4 gallon pots I would feed plants in flower at an E.C of 1.6, in 13 gallon pots I would feed flowering plants at an E.C of around 1.2, and in 18 gallon pots I would set the E.C to 0.8 which is significantly weaker.

Thats the first thing that comes to mind, the second is that when growing in large pots like you are, and as I do at the moment, it is not easy to wait for sometimes up to 3-4 days between watering to allow the pot to go completely dry because of how big the pots are. But believe it or not in bigger pots it is more crucial than ever to allow that big pot to dry out before watering again. Watering in this manner speeds up the metabolism of the plant therefore its uptake of nutrient increases and water spends less time soaked into potting mix which means it has less time to go stagnent while waiting for roots to consume them. (when i say light pots, I am referring to, 'so light they feel like they are full of styrofoam).

I also water/feed/water/feed as well which helps to keep the E.C under control. When I do water (i grow in 25 gallon pots) I give them 4 gallons each which results in significant runoff thus semi flushing with ever water or feeding.

Hope that helps.

It still looks like mineral deficiency/overdose to me

^Agreed. Looks like nutelock,(with some burn) likely from overfert(dark fan leaves are a good indicator).