Plants Stopped Growing - Can't figure out why

[ChenBenTz]

My plants have just stopped growing (about 4 weeks ago), and I need to troubleshoot to find out why.

The plants are green, healthy-looking, not drooping, no nutrient burn, etc.

Off the top of my head:

1.) Light. 18/6 1000w (40cm away)
2.) Heat. 27-32C (AC Cooltube)
3.) Medium. Soil (with a bit of coco)
4.) Humidity. 40-60%.
5.) Nutrients. H&G Soil @ 1.2EC w/tap water
6.) pH. ~6.5 (sometimes a bit higher)
7.) Bugs. Slight case of fungus gnats

So, after all that I'm pretty much stumped.

Anyone have any ideas why plants with these exact conditions would just stop growing?

Photos:

 

[DJXX]

hey buddy....get some pics up if you can...right off the 6.5 ph is much higher than the ideal zone.....5.8 to 6.2 is much better,,,,i am sure someone on here can help...DJXX

 

[ChenBenTz]

Yeah, I'm in the process of getting pics.

pH 5.8 for SOIL? No, that does not sound right at all.

 

[slownickel]

You hit the end of your calcium sounds like.....

If it is worth $50 or so, send a sample real quick to the lab.

Conductivity of 1.2 in soil is not good. Think .6 or so.

A bit of gypsum will help knock that down.

 

[ChenBenTz]

You hit the end of your calcium sounds like.....

If it is worth $50 or so, send a sample real quick to the lab.

Conductivity of 1.2 in soil is not good. Think .6 or so.

A bit of gypsum will help knock that down.

Can't tell if this post is a joke or not, haha.

1.) Hit the end of my calcium? You mean in the soil? Never had any problem with that. Definitely not it.

2.) Sample of what? What lab? Assuming this is a joke.

3.) AFAIK 0.6 is the minimum, i.e. what you water seedlings with. After that, it's a linear curve up to 1.2 for veg and 2.0 for flower, then back down to 1.2. Are you suggesting that EC should be static throughout the grow cycle?

4.) Don't have access to gypsum or any other such material.

 

[ChenBenTz]

Added photos.

 

[slownickel]

You must have a hell of a mix that will take 1.2 or more conductivity.

I invite you to take a read in the slow nickel lounge and there are a number of other threads where you can follow my posts and we are referring to soil analysis with interpretations. So far, no one has enough Ca. NO ONE.

And all the best soil grows have conductivity of less than .6 or so.

Sorry, not a joke. I don't joke about agriculture. I am an agronomist and a farmer.

Sure looks like you are watering way too much (droopy leaves). And pretty sure you have a lack of calcium.

You can use powdered milk instead of gypsum (calcium sulfate), used in every bag of cement on the planet.... No idea where you are....

I am not trying to upset you.

A soil analysis for less than $50 would tell you where you are immediately.

My grow.... https://goo.gl/1U92jS

 

[DJXX]

here is a link you might want to research...regarding overwatering..and below are several charts that may help you...th pic kind of looks like your pics..DJXX
https://www.icmag.com/ic/showpost.php?p=4939806&postcount=5

 

[coldcanna]

Your humidity is wayyy to low to be running your temps that high, the VPD is all out of wack I can almost promise you this is the problem. There are 2 other active threads in the infirmary right now having to do with this same issue. If you want to keep your temps in the 80's (F) then your humidity should be up in the 70s. If you want to keep your humidity at 60 then drop your temps substantially, although I would recommend raising the RH. I don't see anything here that looks like a nutrient deficiency, they look shitty but at the same time you don't see any rust or leaves changing color. They do look over watered but I'm thinking the VPD is causing this look. Make sure you give them good wet/dry cycles, for plants that size I bet you could go 2-3 days in between waterings and be ok. You should be able to tell by the weight of the pot.

 

[Dankwolf]

#1 How often are you watering ?
#2 how much water?
#3 what size potters?
#4 do your leafs drop like that an hour or 2 in to the begening of lights on?
looks like to much water not often enough.

 

[Dankwolf]

Cells dont seem to be dividing properly (hence the bubbles on leafs )