Recurring plant problems after starting co2 supplementation

Hi,

I have a recurring problem for the last 4 grows, when I turn on the co2 the buds stop growing/swelling and start premature ripening.

The grow tent is in a lung room and I'm only adding co2 during the day, at night the lung room is open and there is fresh air coming in the room. Co2 comes from a bottle and is controlled by fuzzy logic controller.

At first I thought it was nutrient or led light related but I tried different nutrient lines and media, coco, rockwool and soil (soil grow seems a little less effected by it but still not how it should be)
Tried slowly increasing the co2 day by day, starting day one flower at 1000ppm, starting in week 4 flower after stretch finished it doesn't seem to matter.

Every time after I start the co2 it's a matter of 1 week and the buds stop swelling en will start ripening and I will end with very small buds and very low yield.
It took me some grow's to realize it has to be related to the co2 because all other tings i already changed basically.

I hope someone can help because this is extremely frustrating

Here are a couple picture's, you can already see the weird bud structure starting to form in the first pic around a week after I added co2.

week 4

week 5

week 6


For comparison the same clones the same day without co2

If something isn't working for me, I stop using it.

... and both rooms are from the same mother?

I forgot to tell that the first 2 grows I start adding co2 I got my highest yield ever, yield went up +-35% got just over 100 grams per sq ft so very frustrating when now I can't even get half of that.

Another strange thing, growtent with mother plants is in the same room and the mothers suddenly start trowing pistils and 1-3 finger leaves, and I'm 100% sure it's not my timer.

DoubleAtotheRON said:

... and both rooms are from the same mother?

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Yes taken from the same mother plant on the same day.

Edit: oh and I tried different strains, doesn't matter same problem

Really strange... never heard of CO2 affecting bud growth in a negative way.

What are your temps and humidity like?

Week 1-3 F temp 85f rh 75%
Week 4-6 F temp 82f rh 60%
Week 7-9 F temp 77f rh 40-50%

Night temp 72F

Man that looks good sorry to hear of your dilemma

Are you raising your feed ppm and light intensity at the same time as raising co2?

I'm always increasing the led light intensity gradually, around week 4 I'm at full strength.

To be honest, I don't think it has anything to do with the feeding strength/nutrients, it was my first thought but I tried different brands, different ppm/EC levels and organic, it doesn't seem to matter unfortunately

Here is a picture of a branch from my mother plant. It looks like reveg but how is this possible when the light is on 18/6 ?

I'm 100% sure it's not a timer error! Anyone have an idea?

Have you tested for HpLVd?

It's far more likely to be some wonky genetics rather than CO2 somehow slowing growth

The buds look like individual foxtails in the first couple pics

PJ Diaz said:

Have you tested for HpLVd?

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I was just thinking the same thing, good call

Have you tried running one plant in a non-hydro/non-chemical, amended soil-only medium?

When I see issues like this, it makes me wonder what straight organics will look like in same environment.

Of course, if your mothers are also experiencing issues, it could be a bigger problem.

PJ Diaz said:

Have you tested for HpLVd?

Click to expand...

Unfortunately there is no possibility for HpLVd where I live.

I have 3 different mother plants, two from seed and one clone only. The clone is in my garden for 10+ years so I'm sure it's HpLVd free and I believe it's unlikely to get it from seeds.

The mother plants where fine before I turned on the co2!

Billy the Mountain said:

It's far more likely to be some wonky genetics rather than CO2 somehow slowing growth

Click to expand...

It also happened with my amnesia clone only grow and I wouldn't call that wonky genetics.

GrownAtHighAltitude said:

Have you tried running one plant in a non-hydro/non-chemical, amended soil-only medium?

Click to expand...

Yes I also tried organic soil grow, it seems to effect them a tiny bit less but still not how it should be

have you calibrated your co2 monitor? maybe it's way higher than what you think it is

gddg said:

Unfortunately there is no possibility for HpLVd where I live.

I have 3 different mother plants, two from seed and one clone only. The clone is in my garden for 10+ years so I'm sure it's HpLVd free and I believe it's unlikely to get it from seeds.

The mother plants where fine before I turned on the co2!


It also happened with my amnesia clone only grow and I wouldn't call that wonky genetics.


Yes I also tried organic soil grow, it seems to effect them a tiny bit less but still not how it should be

Click to expand...

Did you ever figure it out?

I would like to know the answer to that as well, bad batch of co2? Very confusing. I hope you got it figured out.

At

rkymtnman said:

have you calibrated your co2 monitor? maybe it's way higher than what you think it is

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too much co2 can have negative effects including unwanted fox tailing. Im leaning towards checking calibration on Co2 also