Seedlings turning yellow and low temp problems

[Keffka]

I don’t see any aeration at all in your mix beyond those wood chips which won’t offer much in the way of aeration especially once they start decomposing. Aeration is hugely important when it comes to growing. If your plant isn’t old enough with strong enough roots it’s going to struggle to establish. I would pickup some perlite and cut it into your mix by 20% at least. You will for certain notice a monstrous difference in growth. To me, it looks like your plants roots are suffocating and struggling causing you all kinds of issues. In my experience, When they point downward they’re usually trying to tell you something is wrong at the root level.

 

[SmokingWings]

I’m not in the US can’t get a hold of it. I ended up using this:

Australia, eh? There is a sub-forum for Australia. Stop in and say hello. Sometimes when looking for a specific product or type of product other growers in the area can help locate what you want.

The company web site does not list any ingredients for that Seasol potting mix. Some of what they write up about it makes it sound like the mix is better used to amend an existing potting soil. Hard to tell for sure.

Are you adding that shredded wood or wood chips to the soil or is it a mulch on top of the soil. What we can see in your photos does not look like typical soil?

I grow autos indoors at a constant 66-67 degrees F and I get about an ounce per plant. In my context the temp has to be what it is, as I grow in a basement storeroom and I'm too cheap to heat it. It works.

Been there, done that.

When I switched over to a tent for flowering instead of a cabinet I found out that I could use the heat from the tent to warm up the rest of the room. I was able to bring the vegetating area temperatures up to the low 70s except for those really cold nights when it was 0 or below. The cold would just radiate through the area of the foundation at ground level for a couple of days before the outside temps started to warm back up, if going up to 15 or 20 F is warm.

 

[Keffka]

The company web site does not list any ingredients for that Seasol potting mix. Some of what they write up about it makes it sound like the mix is better used to amend an existing potting soil. Hard to tell for sure

Looking at the bag and limited information available I’d have to agree. This stuff seems more like a soil conditioner than actual garden soil.

 

[RedskinnedRhino]

I don’t see any aeration at all in your mix beyond those wood chips which won’t offer much in the way of aeration especially once they start decomposing. Aeration is hugely important when it comes to growing. If your plant isn’t old enough with strong enough roots it’s going to struggle to establish. I would pickup some perlite and cut it into your mix by 20% at least. You will for certain notice a monstrous difference in growth. To me, it looks like your plants roots are suffocating and struggling causing you all kinds of issues. In my experience, When they point downward they’re usually trying to tell you something is wrong at the root level.

This is correct. Aeration is key.
I frequently grow in a mix of rocks and pine bark. A gritty mix. It works great, but I put a 2 Inch deep coco seed-starting layer at the top of the pot for the seed to pop in and spread its wings, then the gritty mix down below. I added heavy amendments to the gritty mix, so its best if the plant finds it after a few days of growth to prevent yellow/burn and seedling death.

 

[Halfrain]

Australia, eh? There is a sub-forum for Australia. Stop in and say hello. Sometimes when looking for a specific product or type of product other growers in the area can help locate what you want.

The company web site does not list any ingredients for that Seasol potting mix. Some of what they write up about it makes it sound like the mix is better used to amend an existing potting soil. Hard to tell for sure.

Are you adding that shredded wood or wood chips to the soil or is it a mulch on top of the soil. What we can see in your photos does not look like typical soil?


Been there, done that.

When I switched over to a tent for flowering instead of a cabinet I found out that I could use the heat from the tent to warm up the rest of the room. I was able to bring the vegetating area temperatures up to the low 70s except for those really cold nights when it was 0 or below. The cold would just radiate through the area of the foundation at ground level for a couple of days before the outside temps started to warm back up, if going up to 15 or 20 F is warm.

The wood chips are already in the soil mix. They are in all the bags I pick up it might be an Australian thing lol. I grabbed a bag of seedling mix yesterday it isn’t as course though might give it a go.

The brand seasol is good it’s probably the biggest fertiliser and soil company in Aus.

I’ll check out the sub forum.
Thanks for you help.

 

[cbdhemp808]

Yeah, check the sub forum and see what commercial potting soil other Aussies may be using. You may need to make your own. I checked Amazon.com.au and there were some options, but looks like none have an actual ingredient list.

Basic DIY blend: topsoil, compost, composted animal manure, worm castings, perlite, coconut coir. No wood chips.

 

[Keffka]

This is correct. Aeration is key.
I frequently grow in a mix of rocks and pine bark. A gritty mix. It works great, but I put a 2 Inch deep coco seed-starting layer at the top of the pot for the seed to pop in and spread its wings, then the gritty mix down below. I added heavy amendments to the gritty mix, so its best if the plant finds it after a few days of growth to prevent yellow/burn and seedling death.

Bingo.. aeration and by extension oxygen are so underrated it makes me sad. It’s quite apparent that the very basics of gardening, plant growth, etc aren’t taught in schools at all. Instead kids learn pointless crap like irrelevant old battle dates. They teach people about photosynthesis which we don’t even fully understand but then completely ignore the basic elements that comprise almost every single plant in existence, and how said plants get and use those elements.

Instead of teaching children zero tolerance and how to shut up and follow directions we should be teaching them how to sustain themselves and produce an abundance for their community. Of course that would make sense and make entire industries pointless and money is far more important than actually educating people.

Do you want strong, healthy plants that produce at the top of their genetic potential? You need to make sure oxygen is getting to the roots and microbes, otherwise you’re essentially raising your plant while strangling it.

 

[cbdhemp808]

It’s quite apparent that the very basics of gardening, plant growth, etc aren’t taught in schools at all. Instead kids learn pointless crap like irrelevant old battle dates. They teach people about photosynthesis which we don’t even fully understand but then completely ignore the basic elements that comprise almost every single plant in existence, and how said plants get and use those elements.

Instead of teaching children zero tolerance and how to shut up and follow directions we should be teaching them how to sustain themselves and produce an abundance for their community. Of course that would make sense and make entire industries pointless and money is far more important than actually educating people.

Well said! I recently learned that Amish kids attend school until age 14, at local Amish schools, and they don't do highschool. After graduating, the kids become teachers. The Amish are hard-working and I understand they are mainly involved with agriculture, animal husbandry, horses, furniture making, and building. In one video I watched recently, the Amish man being interviewed – a farmer – said he could identify over a 100 separate bird calls.

 

[Halfrain]

Well said! I recently learned that Amish kids attend school until age 14, at local Amish schools, and they don't do highschool. After graduating, the kids become teachers. The Amish are hard-working and I understand they are mainly involved with agriculture, animal husbandry, horses, furniture making, and building. In one video I watched recently, the Amish man being interviewed – a farmer – said he could identify over a 100 separate bird calls.

Over here it’s not to bad you have to do Ag in high school. Most schools have a small farm with cows, pigs etc you have to learn about and raise. There is also bee keeping and gardening I guess as a 15yr old gardening isn’t the first thing you are interested in though so most don’t pay a lot of attention.

It’s a learning curve for sure but it really only takes one or two runs to learn the foundations of growing that you can build on I would think.

 

[SmokingWings]

Instead of teaching children zero tolerance and how to shut up and follow directions we should be teaching them how to sustain themselves and produce an abundance for their community.

A famous quote attributed to the late Robert A. Heinlein:
"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects."

 

[MedicalMe]

Do you want strong, healthy plants that produce at the top of their genetic potential?

Of course; don’t we all? But here on 420 it seems like many are asking “how” rather than asking “why”. Perhaps we should start by ask why a plant needs this or that. This is (or was) the stuff of basic high school biology. Why does a particular plant need a certain soil type? What about light requirements at certain stages of growth, and why? What is the role of mycorrhizae in soil and why do want them? What about nitrogen-fixing bacteria? Why do many plants need nutrients, what kinds, and when?

To me, the path to “ . . . strong, healthy plants that produce at the top of their genetic potential” is found by asking “What do plants need to grow?” For example, Emilya does a good job by giving us the answer to not only the how question but the why question with her method of watering a seedling. She explains the needs of a baby root system and why to follow her example for strong, healthy plants.

As the old saying goes, you gotta learn to walk before you can run. Knowledge is power. Google, at your service.

 

[Halfrain]

Of course; don’t we all? But here on 420 it seems like many are asking “how” rather than asking “why”. Perhaps we should start by ask why a plant needs this or that. This is (or was) the stuff of basic high school biology. Why does a particular plant need a certain soil type? What about light requirements at certain stages of growth, and why? What is the role of mycorrhizae in soil and why do want them? What about nitrogen-fixing bacteria? Why do many plants need nutrients, what kinds, and when?

To me, the path to “ . . . strong, healthy plants that produce at the top of their genetic potential” is found by asking “What do plants need to grow?” For example, Emilya does a good job by giving us the answer to not only the how question but the why question with her method of watering a seedling. She explains the needs of a baby root system and why to follow her example for strong, healthy plants.

As the old saying goes, you gotta learn to walk before you can run. Knowledge is power. Google, at your service.

I think it may run a bit deeper than that. Personally I don’t have the time or the drive to learn everything about plant’s biology more that I’m forced to due to legality and affordability.

I’m a mechanic by trade that is my specialty I’d prefer to swap my services for someone who specialises in plants or use my skills to make money to purchase from someone who specialises in plants. If my skills are mechanical learning plant biology in school would have been a waste of time if it was a perfect world and I didn’t have the issues stated above.

I think that would be the case with a lot of growers asking questions on here they were forced into the position rather then wanting to take it on as a new hobby.

I believe that’s why we have communities of people who specialise in different things if everyone was a jack of all trades no one would be a master of anything.

 

[Grow AZ]

First, I would not use soil loaded with nutes makes it to hard-to-get control over your feedings second, I would have used smaller pots for seedlings and moved up from there as they got larger. Just my two cents as far as lights I grow outdoors and only use lights for seedlings, I do not have a tent. They will be ok and the ones in new soil will do fine too. Happy growing.

I agree, start with some nutrient rich soil in a solo cup with a plastic bag over the top to keep your temp and humidity up. They really should be self supportive for the first while other then a bit of water if they are in the correct environment. Once you are having to water frequently move to a larger pot.

 

[RedskinnedRhino]

A famous quote attributed to the late Robert A. Heinlein:
"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects."

My favorite author.

 

[SmokingWings]

My favorite author.

I recognized your thread "A SIP Grower's Guide To The Galaxy" because it looked like a play on the title of a famous book by another respected author..

 

[Halfrain]

Alright I tried have tried new soil and different strain. I’m still getting the same symptoms leaves look dull and slow growth. Is there something going on? I know you have to get every thing right when going for max yields but should be able to get a decent plant with what I got.

 

[SmokingWings]

I know you have to get every thing right when going for max yields but should be able to get a decent plant with what I got.

True. Sometimes it takes a bit of doing to get the routine together. It can be frustrating but most of us have had to go through it.

Alright I tried have tried new soil and different strain. I’m still getting the same symptoms leaves look dull and slow growth. Is there something going on?

Same as before, photos taken in natural or white light will give us a better idea of the shade of green in the leaves and just how dull they they look.

The soil mix you picked up is for starting seeds and clones and should be OK for that but not for growing the plant once the roots have become established. Thing is that the two taller ones are probably auto-flowers judging by how large they are and that they are already in flower. If the smaller two plants are also autoflower then I think that the best thing is to leave them in their containers. If they are not autoflowers did you adjust the number of hours that the lights are off?

Read up on how to grow in coco coir and how to fertilize them. Get a handle on what nutrients should be in the fertilizer and ratios. You are going to have to do that quickly since plants in flower are very demanding of which nutrients they get, how often and how much. The amounts of nutrients that were put in the coco coir will not be enough to keep a fast growing plant healthy.

Also, read up on how to water coco coir because it will be different than if the plants are in a natural or mineral soil. Look at some of the journals and try to find ones where the grower was also using coco.

 

[Keffka]

You also appear to be missing perlite or any sort of decent aeration amendment.. cannabis LOVES oxygen in her roots. A nice loose airy soil for her to build in will give you explosive growth. By the look of the containers, it seems she’s having to fight the soil just to push roots out.

I cannot over state how important aeration is for cannabis growth. These plants are 14 days old max (the larger containers are oldest):

The gang

• Keffka
• Jan 6, 2023

The gang alt angle

They were planted in a seedling soil with very low to no nutrients at all and you can clearly see their growth. This is because I had a very aerated soil mix for them to sprout in. I could probably post 12 more paragraphs about the importance of aeration and everything it impacts.

 

[013]

Seedling color is off, the nutrients are not right at this point in time.

Ditto - I believe the biggest problem is too much uncomposted wood in the soil mix. All that wood chip mulch on top is sucking up lions share of the nitrogen and using that N to aid in decomposition process, this leaves wrong mix of nutes in your soil.

also don’t water where your roots are, water where you want roots to grow…. you are on the verge of overwatering right now and the real underlying issue is not enough oxygen to the root zone because the soil stays wet / not enough aeration.

it’s all good tho, hang tight & we will get ya tuned up

 

[Roy Growin]

What they mean by 'Seed & Cutting Potting Mix' is that it is designed for potting-on established seedlings and cuttings
Start them off in peat plugs, coco, root riot or something
Looks to me like a rich, acidic mix - too much for a seedling