Looks like phosphorous deficiency. Sometimes accompanied by Calcium deficiency as Phosphorus and Calcium interact with each other in the plant.
Bat Guano tea or Worm Casting tea can remedy this BUT pH, temperature, nutrients, all need to be checked before you chase any deficiency.
An excess of Fe and Zn can prevent the plant from being able to absorb phosphorus properly. If you believe there may be a buildup of nutrient salts in your growing medium you should make sure it’s not an excess of other nutrients that is actually causing the phosphorus deficiency to appear.
Flush your plant thoroughly with properly pH’ed water containing a regular dose of cannabis nutrients including phosphorus.
Just my 2 cents but other might be able to help if you fill this out as well:
COPY/PASTE the below list into your forum post.
Answer these simple questions the best you can. If you aew not sure, just bring it to oue attention. We will figure it out.
looks like she is getting over fed and has wet feet. if you grow in buckets you must provide tons of air holes for root ventilation and runoff. try to avoid any defoliation unless the leaf is sick or dying. 1 it stunts them, 2 you are diminishing light gathering ability. my suggestion is too drill a but load of holes in bucket bottom and sides. DONT GO DEEP IN to avoid root damage. slide a bunch of straws into holes to improve air flow, they dont need to stay for more than a few days. stop all waterings and feedings for a couple weeks, until she says to water! you will know by droopy leaves. this is a challenging problem to correct but it can be done. need to act fast before pythium takes hold, once it does she’s a gonner.
If it was me i would get a 7-10 gallon cloth pot. Cut that 5 gallon plant killer down the sides in 5 or 6 places and peel it off and transplant her. As long as dont damage roots you would be fine. It would be easier to maintain in the long run. I up pot from 7-10 into a 20 all the time for strong mothers.
Bags breathe better than buckets. Unfortunately, the free buckets available to me, holed with hundreds of holes, will not outgrow my bag plants. I melted hundreds of holes, melted into every square 2 inches, sides and bottom. Bags, don’t give of toxic fumes and at least they didnt contain weed killer, originally.
I have been trying to get a buddy to ditch the buckets. I even went so far as to give him a bag but he still uses homers. me?, I wont transplant if I dont have one. I am using one in a grow currently but its a test run of a dual root zone setup (Octopot). if it works I will switch to a bag except for the hydro side. just couldnt cut up a good bag for an expiriment.
can be cut and used as drip pans, White in color, replacing my automotive black oil plastic pans and the top used as an outdoor plant collar (weed-eater/lawn mower protection ring). My Bags will wick FASTER than the plastic and for a consumate over-watering moron, that is important and valuable. Age has epired my 10gal inventory for tent use (my age, that is). To each their own.
GGTY.
30 holes is nothing. I melted holes everywhere >100, in 4-gal buckets.
Does bucket (with holes0 reside inside spill proof bucket?
AIR
Soldering iron or drill, multiple examples, still like bags.
Best wishes.
I asked because if they are only on the sides then there will be a small amount left at the bottom that will become stagnant and foster root rot. The soil should be able to drain 100% out of the bucket.
So it needs holes on the underside too.