seedlings dying second to third set of leaves

[StickyBandit]

Still, that probably means the soil mix was nutrient heavy for young plants. I usually buy the seedling and cloning soil from the general gardening stores for seed germination. Much better than fuck up some seeds cause the mix I used was a bit more fertigated than it should have been. It happens sometimes with big batches, that is why the proprieties are usually given as an interval and not fixed ones.

This is also what I've found. I've been having better success lately since I started using organic seed mix from the hardware store. Sometimes I water it down with a very small amount like 10% of coco/perlite for aeration and water retention and a small amount maybe another 10% of worm castings to get the microbes going.
After that I water with straight rainwater until they look hungry (maybe even a slight yellowing of the lower fan leaves)
I also struggle with smaller pots especially with different strains that have different needs
Sometimes I like to start plants in a 30L pot of nutrient rich soil but I make a 2L hollow and fill it with seed mix and plant a seed with a small clear plastic cup placed on top as a little greenhouse until the seed sprouts. It's amazing how fast they root and grow if unimpeded. This way you can thoroughly water and mix the soil before planting and you won't have to water for about the first week. In fact they seem to like it better if the roots have to go searching for moisture

 

[indoorpsychs]

This is also what I've found. I've been having better success lately since I started using organic seed mix from the hardware store. Sometimes I water it down with a very small amount like 10% of coco/perlite for aeration and water retention and a small amount maybe another 10% of worm castings to get the microbes going.
After that I water with straight rainwater until they look hungry (maybe even a slight yellowing of the lower fan leaves)
I also struggle with smaller pots especially with different strains that have different needs
Sometimes I like to start plants in a 30L pot of nutrient rich soil but I make a 2L hollow and fill it with seed mix and plant a seed with a small clear plastic cup placed on top as a little greenhouse until the seed sprouts. It's amazing how fast they root and grow if unimpeded. This way you can thoroughly water and mix the soil before planting and you won't have to water for about the first week. In fact they seem to like it better if the roots have to go searching for moisture

All this things you are talking about are fine,different grow styles,everyone have their way and if ti works it works.But i stated in my previous messages that i tried different styles and i have the same exact results.My plants are second day out of the tent and they are already looking better so i think the tent was the culprit.

 

[GMT]

If it is the tent, wouldn't differing air exchange rates have shown differing degrees of problem, with the highest rate almost eliminating the problem? In order for it to be producing so much pollution that it was poisoning your plants during high rates of air replacement, it would make it a hazardous material surely? Any company selling products like that needs naming, shaming and reporting. But only if you are sure.

 

[Three Berries]

If the ex fan is running constantly I don't think it's air pollution unless it's the ambient air.

 

[indoorpsychs]

If it is the tent, wouldn't differing air exchange rates have shown differing degrees of problem, with the highest rate almost eliminating the problem? In order for it to be producing so much pollution that it was poisoning your plants during high rates of air replacement, it would make it a hazardous material surely? Any company selling products like that needs naming, shaming and reporting. But only if you are sure.

that's why i am not naming the company yet.it is only being 2 days but i had 2 seedlings already out of the tent for 2 days and i have to say it's being 4 months i havent seen this shade of green i am seeing right now.I have already contacted the company and they told me they have no complaints about their tents and the tents are tested.Didn't say what test did they perform,was it a chamber VOC test or what but i believe that most of the companies selling cheap tents go to some manufacturer in china,tell them i want this tent,this nylon canvas for the cheap quality,this canvas for the medium and this for the expensive.dimensions and we are done.my tent has 420D nylon which i found is coated with pu(polyurethane) that with pvc are the most offgasing materials.Don't know if that is the problem and i am not completely sure the tent was the problem.Even when i was dissasembling the tent i was telling myshelf that i was working extra for no reason but i already see differences on the seedlings.

 

[Hammerhead]

There shouldn't be any of those tents left made with bad reflective liners. I'm sure there might be some china made tents using it. Just don't buy from an unknown source. Ive not seen any issue related to tent outgassing for many many years.

 

[indoorpsychs]

If the ex fan is running constantly I don't think it's air pollution unless it's the ambient air.

because im in a new house and it was painted i thought about that but i dont think they can find so bad wall paints in eu.i guess only the future will tell.

 

[indoorpsychs]

There shouldn't be any of those tents left made with bad reflective liners. I'm sure there might be some china made tents using it. Just don't buy from an unknown source. Ive not seen any issue related to tent outgassing for many many years.

Hadn't even see there was a problem like that in the first place.But googling about iron/sulfur deficiency in seedlings i couldnt find anything that resembles my problem in the pics.I saw seedlings in clay like soil diying but this was not my case.Then when i found a photo that looked like my seedlings it was from the thread in here grow tents killing plants but didn't even bother to read it.2 months later and here i am....

 

[Hammerhead]

Yes, about a decade ago(2008) people had issues with their tents off gassing causing plant issues.

Grow Tent OutGassing / Offgassing WARNING!!

By now some at least reading this post will have at least heard of the Offgassing effect within grow tents being reported throughout the internet. This is a confirmed effect admitted to by at least one manufacturer of these tents, however it is obvious with the amount of problems occurring from...

www.icmag.com

 

[indoorpsychs]

Yes, about a decade ago(2008) people had issues with their tents off gassing causing plant issues.

Grow Tent OutGassing / Offgassing WARNING!!

By now some at least reading this post will have at least heard of the Offgassing effect within grow tents being reported throughout the internet. This is a confirmed effect admitted to by at least one manufacturer of these tents, however it is obvious with the amount of problems occurring from...

www.icmag.com

years after that there are problems with poles,i think it was 2012 with the company admitting that the poles are causing offgasing,something about the galvanized steel and then last thing i saw was about 2015 with the tent's window causing issues.That doesn't mean anything to me,i know what i am going through 4 months now and i am sure something crazy is going on.Is it the house plumbing,the tent,the house paint?I don't know,i hope i found it because i just want to grow some weed and smoke it,nothing more nothing less.Didn't even want to learn about voc and degassing materials and types of nylons.

 

[GMT]

Was that really 14 years ago , I genuinely thought it was about 3 or 4.

 

[kaboom777]

your mind already has a diagnosis and no one can change it. Very old and expert growers have been here and you haven't even listened to their advice. all taken from a couple of old threads on the internet, as bob marley says, only you can free the chains of your mind. luck and blessings.

 

[Hammerhead]

I use 3 tents 2 are 4x8 and have those plastic windows. Both were bought from Amazon. I have never had any issues caused by the tents. I did have some issues with plants not fully flowering they looked like a reveg in one of the new tents but it seems it was a light problem. It's been fixed(bad light). The other Mars tents have a mesh window. The odds the tent is causing the prob are minimal.

It's an easy problem to figure out. You don't need much to grow seedlings. I use to veg everything under t5/8 lights decades ago no tent. Today a small 250w LED will grow plants well with no tent. In case you didn't know a decent tent is cheap. With Balck Friday sales there even cheaper.

Mars Hydro 2x2 Grow Tent - 24''X24''X55''(60X60X140CM)

www.mars-hydro.com

 

[exploziv]

Since chinese manufacturing market is really good at copying from one another, I really don't expect any newish tent to do really dangerous or so easy to see on the plants offgasing.

 

[indoorpsychs]

your mind already has a diagnosis and no one can change it. Very old and expert growers have been here and you haven't even listened to their advice. all taken from a couple of old threads on the internet, as bob marley says, only you can free the chains of your mind. luck and blessings.

i will answer you in a week or 2,maybe you are right.But most of the answers are about grow styles.I have said it a lot of times.Somethimng crazy happening doing the same deficiency in plants growing in different ways.Telling me about watering,nutrients,organics etc doesn't help at all.i was hoping i could find someone who had one of those tents but most of the things everyone is saying is being tested.So if everything continues diying maybe you were right,or its something else.But read this:It has to be something in common to all the plants and ec,ph,watering schedule and volume,nutrient lines and substrate is NOT.

 

[indoorpsychs]

I use 3 tents 2 are 4x8 and have those plastic windows. Both were bought from Amazon. I have never had any issues caused by the tents. I did have some issues with plants not fully flowering they looked like a reveg in one of the new tents but it seems it was a light problem. It's been fixed(bad light). The other Mars tents have a mesh window. The odds the tent is causing the prob are minimal.

It's an easy problem to figure out. You don't need much to grow seedlings. I use to veg everything under t5/8 lights decades ago no tent. Today a small 250w LED will grow plants well with no tent. In case you didn't know a decent tent is cheap. With Balck Friday sales there even cheaper.

Mars Hydro 2x2 Grow Tent - 24''X24''X55''(60X60X140CM)

www.mars-hydro.com

it would be nice if i could have a mars hydro,a tent that costs less from what i paid and has one of the best quality nylons out there.But i won't buy a tent with my credit card from my country.No need to say more on that subject.

 

[FletchF.Fletch]

Give is a breakdown of your different water, EC, ph baselines when you're doing different things at the same time to test. It may help diagnose further

 

[indoorpsychs]

Give is a breakdown of your different water, EC, ph baselines when you're doing different things at the same time to test. It may help diagnose further

after i ruined 15 bought seeds and the free seeds that came with them,they were around 10 i was given og bagseeds.a lot.i fed from 5.6 to 6.5.some of them watered to fully saturation to fully dry.others as i was previously doing,20-30 ml around the stem every 2-3 days until i need to fertilize and then go DTW.Others I tried not let them completely dry and go from fully saturation to 20-30% moisture,by cup's weight.I even did what Bill Ward is saying water every day in peat to replenish the oxygen of the water!!!i stated that i tried everything logical and not logical.some of them i fed before the 8-10 day mark that the deficiency was exhibiting,others i didn't even gave kelp or micrfoorganisms.i fed with canna terra,advanced conoisseur,remo 3 part and GH floranova.tappered methods and my own way.i bought biobizz light mix,canna coco and amother bag of plagron light mix.coco i did wet to dry,every day,high ec,low ec.i might forget a lot,i have diaries with the different seed teams but the first seeds sprouted at 7-13.4 months now i have done literaly everything.i have said it a lot of times.I KEPT GETTING IRON DEFICIENCY SECOND TO THIRD SET OF LEAVES.not nitrogen,not calcium in coco,just fucking iron.runoff ph i got down 5.6 to those overfed but mostly 6 to 6.4.i flushed some of the overfed ones just to see.i even gave magnesium sulfate with magnifical that has iron foliar.Edit:not just fucking iron,iron sulfur

 

[FletchF.Fletch]

What concentration or mixing rates are you using for your fertilizing for your different tests? Do you measure your EC?

 

[indoorpsychs]

What concentration or mixing rates are you using for your fertilizing for your different tests? Do you measure your E

0.3 to 1.8

Grow Tent OutGassing / Offgassing WARNING!!

....is still good to use it has a white inside i want to use it because its years old not sure if its bad or not? please respond asap so flowers can flower thank you ^^^

www.icmag.com

Warning new off gassing product!!!!

Warning new off gassing product!!!! -------------------------------------------------------------------------------- So I have been experiencing a mysterious yellowing for about 10 months. Every thing that went into one of my 11 different rooms (some that had been going 5+ years) started to...

www.icmag.com

I see this thread has been down for a bit but I must ask... Are these offgassing symptoms?
I am a seasoned soil gardener and recently went from a wood framed and paneled room to a Jarden. Ive had people I respect and trust recommend the Jarden so I gave it a shot.
I knew my soil needed tweaking so initially I tried correcting with AACT's, while my new soil batches were composting. But then I used my new soil....2x Sameexact clones, container size and shape, everything the same except I flowered one in the tent, and 1 in my wood framed room. The one in the tent was dyeing and the one in the room is thriving! Whiskey Tango Helen?
Ill get pics of the 2 pre 98 Bubbas from both rooms soon, but, for now.... This is Bodhis Yo Mama suffering for believed offgassing

@fourwiseeyes its not offgassing, looks like a phosphorus deficiency..
Fix by using one of these products according to your preference:

It most certainly was off gassing. Got a refund on the tent from the manufacturer, used soil directly from the tent of death, as I've come to call it. No till style. Pulled a dead plant from the tent. Placed a healthy clone of the same variety in the container and placed in my wood built room, in which I've never had issues. The plant took off with only a few AACT through bloom and produced very well.

That's why off gassing is so damn hard to identify. I never did get the pics of the bubba clones that grew inoppositerooms... Maybe I'll try to do that.