Brown spots in my big buds, need advice, lots of pics, please help, thanks!

first of , the plants dont look like 65 days old , some of them look like 25 days from seed and im not exaggerating , what do u have for air exchange/circulation , when do u apply the co2 ? u should be lights off the hot hours and not the opposite , u dont need any of thesse tactics when u on veg , u consume energy which is noit needed , when u use coco u suposed to water more often , whats the volume of the pots and how much water u use on every water ? , i hope u got more space in height for the flowering

ur plants should be fed regurally , seems the BB needs some ph spin up , BY MG/CA agents

if u dont have good air exchange then this is ur sole problem

could those spots be from foliar feeding?
temps should be colder at night and the fact that it isnt may harm your yield.
your plants look fine so just see if the spots progress they may be Mg defisiency you should feed your plants.
over all nice looking setup + rep

Originally Posted by bonjo78

first of , the plants dont look like 65 days old , some of them look like 25 days from seed and im not exaggerating , what do u have for air exchange/circulation , when do u apply the co2 ? u should be lights off the hot hours and not the opposite , u dont need any of thesse tactics when u on veg , u consume energy which is noit needed , when u use coco u suposed to water more often , whats the volume of the pots and how much water u use on every water ? , i hope u got more space in height for the flowering

ur plants should be fed regurally , seems the BB needs some ph spin up , BY MG/CA agents

if u dont have good air exchange then this is ur sole problem

HI, I know my plants do not look the age they are, this was mainly because of a mistake on my end. Initially I put them in party cups and left them there for a month which caused them to be stunted, when I realized they had already ovewrgrown the cups and were root bounded I transplanted them inmediately.

Plants are inside a closet so air circulation is limited, however, they do have two 14 inch computer fans taking air in, as well as the air conditioning pipe, and two 20 inch computer fans taking the air out.

I water when they need it, so I think, meaning when the soil is getting dry. I stick my finger and it it feels dry two inches down then water it is.... Remember this is not coco alone and it also has compost and EWC.

I add the CO2 for 15 minutes every three hours, during the lights on hours, for one hour in total with the regulator set a 3 CFPH; I meant to say cubit feet and not pounds... turning off the fans during those three hours. During the night times ventilators and extractors are on at all times.

The reason the temps are higher at night is because I turn off the AC at night and it is summer time here where I live so in order for my temps to be higher at night I would have to have the AC on 24 hrs per day... meaning that my plants wake up at 6 pm at night and go to bed at 6 am in the morning.

They are in one gallon pots and as far as air circulaion goes, I do not have any means to increase it, like I said, they are in a closet...

Now my question would be, would a PH inbalance be causing those brown spots?

Thanks a lot Bonjo!

Originally Posted by Saldaw

could those spots be from foliar feeding?
temps should be colder at night and the fact that it isnt may harm your yield.
your plants look fine so just see if the spots progress they may be Mg defisiency you should feed your plants.
over all nice looking setup + rep

I do not think foliar feeding is causing them but hey, I might be wrong, and the reson I say that is because if that's the case the spots should have appeared long time ago, they have been foliar fed for two months now.

I will start turning on the AC at night and see how it goes.

I will also monitor them closely and see the progress in terms of a possible MG deficiency.

Thanks a lot Saldaw!

BB.

yo baseball nix the co2 until you flower and then only use it when your lights are on. you need a co2 test kit . my 20 pound tank comes on for 2 min every hour while the lights are on and a 20 pound tank lasts two months co2 ppms should be no higher than 2000 ppm. coco fiber is a hydro mix so you will have to adjust your water to around 6 im guessing. try a general hydroponics ph test kit its around 15 bucks and makes a huge difference unless you have a ph pen. also check for bugs under the leafs being spring time they will start showing up. hope this helps. one more thing that might help you because your growing in a small space try less daylight hours try 11 on 13 off.it will keep the plants smaller and they will bud faster.

Dear Smokealot,


I appreciate your input. I did some testing for soil PH and realized my soil was around 7.5 PH, being a little bit on the high end I decided to flush and leave for a few days and then water feed using the same Hydro solution I have been using to foliar feed and add a molasses to it, being it is very acidic. I think it was a Mag deficiency due to high PH so after flushing and feeding with my hydro solution which has calmag in it along with the molasses with also contains calmag have resolved the problem. The result was the brown spots stopped appearing and the plants look very healthy green now as they were very pale when I posted this. I have continued to feed on every watering every 5 days or so and flowers are starting to form nicely. I also let the air conditioning run 24 hours per day so temperatures are lower at night than they are during the day as it was the opposite before. I have only used molasses once and plan on useing it every other feeding as I do not want my PH to lower too much either.


Now, with regards to the CO2, I have the regulator set at 4 SCFH injecting 25 minutes of CO2 every three hours. For what you are saying, I am injecting way too much CO2 to my plants, correct? If that is the case, and I do not have a CO2 meter nor the means to buy one right now, how harmful would it be to my plants? I actually increased it as soon as I started flowering as I had it running for 15 minutes every three hours as opposed to the 25 minutes every three hours it is running at now. There are ways to find out how many PPM of CO2 you need to inject to your growing space to reach the ideal 2000 PPM without having a CO2 meter, but I have been doing it without regards to that theory (stupid me) as it could be causing me to have too much CO2 in my growing space and therefore spending too much money in CO2 along with the consequence of possibly harming the plants. But honestly the main reason I do this is to compensate for CO2 loss due to leakage in the growing area.


I have also checked for bugs as that was one of my main concerns but there is nothing under the leaves and I have a very good tool to do this...


Now with the lights cycle. They have been in 12/12 for 15 days, do you think it would be good to change now to 11/13 for the rest of the flowering cycle? let me know and I will definately follow your advice as I was planning to do this but maybe two more weeks from today, meaning that I would change to 11/13 after a month fo being in 12/12.
I do not have problems with the space and I can adjust vertically every time the plants get to a half and inch of the lights. When this happens, I move the plants down about 3-4 inches. I have a 6 foot vertical space in total.

I will post pics of my plants later on tonight when they wake up!


Thanks a lot!


BB

Some pics of my plants at 15 days of flowering:

DSC02234.JPGDSC02235.JPGDSC02236.JPGDSC02237.JPGDSC02238.JPGDSC02239.JPGDSC02240.JPGDSC02241.JPG

Foliar spray nute burn is my vote.