Co2 deficiency?

S

SuperUser

Active Member
So it will be technically my second grow, first one was 1plant in a home office. I wasn't monitoring anything and it came out great .

Now it's another story, I don't live alone anymore so I've built a 3x3x4 grow box in my 10x20 (heated) shed.

Promix XP, party cup to begin.
Temp are OK, humidity 40% light is an array of 23w CFL for a total 276w cfl (real)

The thing is:
Seed pop without any problems, I gradually turn on the light (1 or 2 bulb at first) then, when the plant is about 2 or 3 inch and the baby leaf are being replace by "real leaf" I remove the jiffy humidity cover...

Then the growing stop.

It stay at baby stage. Some of them just stay at this stage, other turn yellow, loose leaf and die.

Wtf!?

The shed is insulated and heated in winter. There is a second small heater in the grow box to ensure everything is stable enough so it doesn't froze if I open the door to take out the snow blower...

The only thing I can see is co2? I don't go often in the shed. I just open the door for 2-3 sec few time a week to grab a tool and that's it.

Please help!
 
nfhiggs

nfhiggs

Well-Known Member
SuperUser said:
So it will be technically my second grow, first one was 1plant in a home office. I wasn't monitoring anything and it came out great .

Now it's another story, I don't live alone anymore so I've built a 3x3x4 grow box in my 10x20 (heated) shed.

Promix XP, party cup to begin.
Temp are OK, humidity 40% light is an array of 23w CFL for a total 276w cfl (real)

The thing is:
Seed pop without any problems, I gradually turn on the light (1 or 2 bulb at first) then, when the plant is about 2 or 3 inch and the baby leaf are being replace by "real leaf" I remove the jiffy humidity cover...

Then the growing stop.

It stay at baby stage. Some of them just stay at this stage, other turn yellow, loose leaf and die.

Wtf!?

The shed is insulated and heated in winter. There is a second small heater in the grow box to ensure everything is stable enough so it doesn't froze if I open the door to take out the snow blower...

The only thing I can see is co2? I don't go often in the shed. I just open the door for 2-3 sec few time a week to grab a tool and that's it.

Please help!
Click to expand...
Its not CO2.

Keep the humidity dome over them longer. Dilute the Promix with 30% perlite. What size container are you starting them in? Are you popping them in jiffy cube?
 
S

SuperUser

Active Member
nfhiggs said:
Its not CO2.

Keep the humidity dome over them longer. Dilute the Promix with 30% perlite. What size container are you starting them in? Are you popping them in jiffy cube?
Click to expand...
I tried both; jiffy and straight in party cup full of promix.

It's promix hp, Already full of perlite... You say I need even more?
 
F

flashx

Well-Known Member
Since you say your location requires a heater, im thinking you are better off using a HID lighting instead of those cfls and heater. The HID can keep your plants nice and warm. Also at that stage of a young seedling life, you are better off using an inert medium. That don't need nutes till at least one week. Even then they require a very small amount. Having the correct PH is far more vital for them at that stage.

Oh and forget to mention, over watering and poor drainage is the number one newb mistake that kills seedlings.
 
OldMedUser

OldMedUser

Well-Known Member
A stated above HP has no nutrients in it so nutrients of some kind must be added. There is more than enough perlite in it tho to use as is straight out of the bag. I've been using it for a few years now with 3 - part pH Perfect nutes and it works great as a soilless media. The older ones like ProMix BX had very little perlite and needed more but HP sure doesn't. I'm growing now in a 50/50 mix of the HP and ProMix potting soil that I added some perlite to and the plants seem to love that. Adding molasses to the nutes to feed the Myco and they seem to like that too.

With the pH Perfect nutes, reverse osmosis water and HP you can forget about pH and just grow. Super simple for new growers to get started with especially if they don't want to get too deep into the science of it all and just grow some cheap pot. Super easy for lazy old farts like me too that get tired of checking the damn pH all the time. :)

For less than $100 you can get enough nutes to grow a few thousand dollars worth of pot and do a decent job of it right out of the gate. Whatever you decide to use don't use Miracle-Gro!

:peace:
 
Cx2H

Cx2H

Well-Known Member
Switch to soil problem solved. He is low maintenance on his crops.

I assume the seedlings are falling out from pH lock out and low humidity when the dome's get pulled. I stay on top of my pH. Those perfect lines hit 6.0-6.2 all day at full dose, start halving and quartering not even close. 5.8-5.9 is the place to be
#IMO
 
nfhiggs

nfhiggs

Well-Known Member
"baby leaf are being replace by "real leaf" "

Is this occurring after the cotyledons (the baby leaf" are dropping off? If that's the case, then you need to start adding some growth food, since the Promix HP has no nutrients in it.
 
H

HighestHD1200

Active Member
Check this out.. There is food in this medium.

Also, read and research for yourself. Not everyone on here knows as much as they claim, including myself.

Im just providing you some information and spurring the discussion.
 
OldMedUser

OldMedUser

Well-Known Member
HighestHD1200 said:
Check this out.. There is food in this medium.

Also, read and research for yourself. Not everyone on here knows as much as they claim, including myself.

Im just providing you some information and spurring the discussion.
Click to expand...
That's the wrong info pal. I've got 3 bales of ProMix HP sitting here and have used it for 3 years. There are no added nutes.

Peat Moss
Perlite
Dolomitic and Calcitic limestone
Wetting Agent
Mycorrhizae - (Beneficial fungi)

Where's the nutes?

You should take your own advice and read and research before claiming things you don't know as much about as you think you do.

Good effort tho. :D
 
H

HighestHD1200

Active Member
OldMedUser said:
That's the wrong info pal. I've got 3 bales of ProMix HP sitting here and have used it for 3 years. There are no added nutes.

Peat Moss
Perlite
Dolomitic and Calcitic limestone
Wetting Agent
Mycorrhizae - (Beneficial fungi)

Where's the nutes?

You should take your own advice and read and research before claiming things you don't know as much about as you think you do.

Good effort tho. :D
Click to expand...
 

Attachments

S

SuperUser

Active Member
Thank you everyone for your help.
I think we saved them!

I think the main problem was i removed the humidity cover too quickly, stash is getting low so I got in a hurry.

For the light I got a 400mh lumatek in a cooltube but I was using the CFL for the seedling.

So I've put them in bigger pot (I make them), more promix HP, replaced the CFL with the 400w mh, added humidity controller (discovered sometimes it drop at 30%). I also started to give them 20-20-20 PlantProd @1/4 strength (always had good results with those nute)

It's only been a week and they went from dying, to somewhat healthy looking.

Sadly I didn't took a before picture, but just imagine 2 dying baby plant with 2 small yellow leaf each.

Thanks guys
 

Attachments

sazugt

sazugt

Member
They look good in those pots man! Glad they came back! I know when I first started out I was having the same type of problem and it turned out to be over watering, when they're little seedlings you don't want them to dry out so as a noobie you water, water, water. This takes them through that first week or two but root rot gets them before they get much farther.

By the look of the pics it looks like you got it all handled now though! They look good man, grow on!

-Sazugt
 
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