Yellowing seedlings

[Tom Bombadil]

If you're 22 days in I'd start the ff micro &grow at 1/4 strength.

I dont think they've had time to deplete whats already in the soil

 

[LearningMore]

If you're 22 days in I'd start the ff micro &grow at 1/4 strength.

Great, thanks!

 

[LearningMore]

I dont think they've had time to deplete whats already in the soil

I suspect not, especially since they seem to have been unable to uptake much of anything til now! I’m trying not to change anything else too quickly. In a few days I may start just a whiff of nutes, not even 1/4 strength and SLOWLY go up... I know these girls can’t afford any more setbacks like nute burn...

 

[Fitzy]

I suspect not, especially since they seem to have been unable to uptake much of anything til now! I’m trying not to change anything else too quickly. In a few days I may start just a whiff of nutes, not even 1/4 strength and SLOWLY go up... I know these girls can’t afford any more setbacks like nute burn...

Nice bud this will teach you so much especially if you continue even with 1 I will say yeilds will be impacted for sure so starting a few new 1s would be a good idea if looking for a good harvest not saying they couldn't do well but it won't be as good yeild wise

 

[LearningMore]

Nice bud this will teach you so much especially if you continue even with 1 I will say yeilds will be impacted for sure so starting a few new 1s would be a good idea if looking for a good harvest not saying they couldn't do well but it won't be as good yeild wise

I have new seeds going now, as I have some space. They’ll go into the Happy Frog soil...I’m very interested to see how the grows differ.

I wish we could learn by doing things “right”, but definitely not where the best lessons come from. My goal is to learn more every day. Thanks to all of y’all, I’ve definitely learned a lot this week.

 

[Tom Bombadil]

Thank you. I will change how I water, as pH going in I know is ok (Or do I need to check pH of soil??

Not if you use purified water with under 20 ppm of minerals in it. At least I never do.

 

[Jaydot]

Plants are 22 days above ground. In big-box potting soil (Kellogg organic potting soil) + 30% perlite. Under HLG 600Rspec at lowest dimmer setting, 24” height, lux ~7200 (20/4). Temps low 70s; humidity 65-73 or so. Watered 5 days ago with 1/2tsp Recharge per gallon (pH 6.4, filtered tap water TDS 150). Have been checking dryness of upper soil/weight of bags and watered 500ml each again today, just before pic. Lower leaves seem to be yellowing, and some feel a bit dry (not quite crunchy). Are the plants telling me I waited too long to water? Time to start nutes? (I have trio, and read to use 1/4 strength starting around 3-4 weeks?). Something else wrong?

I will be spacing these plants out to a second 4x4 tent once (if!) they get bigger. Any suggestions appreciated as this is my first grow.

I was in your situation 2 weeks ago, unfortunately I wasn't able to save them, they did recover for a bit but the damage was done.
I am certainly not the person with experience to give you advise but I'll tell you what I think I've learned from the help here.

The soil was one issue (possibly), the idea was that there is a huge demand of soil in the last year,
which possibly causes the soil not to be at desired quality. I switched to coco now to avoid that problem.

Perhaps you might have your "pot lifting" weight wrong, 5 days without watering seems like a long time.
so possibly the bottom of the pot dried out, feeding 500ml to dry soil will only wet the top layer so the bottom roots stay dry, roots growing in dried out soil will stunt the plant. That's what I think happened to me because I was watering very little because I thought I was doing it right.
What they mean with a wet/dry is basically keeping the weight in water as 100%/50%, in general you can't let the soil dry out.
I would water till you barely see runoff and not water until 50% of the water weight is gone, perhaps you could use a scale to be sure.
In general if you take a hand of soil and squeeze it without drops of water it's time to water.
From what people told me the best you can do is repeat watering the full pot and letting it dry untill 50% of the water is gone.
I learned that keeping your soil moist is a skill and although it seems simple (and it is after some time), the internet is full of information that contradicts one another so you end up learning the hard way.

People also mentioned it could be bad seeds, do they all come from the same place?

With that said, they might be hungry but I do think they look stunted,
you said they are at day 22,
I assume they are autoflowers, around day 28 they will start to show signs of flower
At this age they would have to be bigger and you should be starting LST in the next days.

I would start new seeds at this point, even if you can save them, you will be disappointed by the results.
Its better to start over and ask questions on what you are confused about on the forum.

But again, what do I know, I was in the same situation 2 weeks ago and only started my coco grow today so my experience just comes from others on the forum, maybe some experienced people can pick up on my reply.

Anyway good luck : )

 

[LearningMore]

I was in your situation 2 weeks ago, unfortunately I wasn't able to save them, they did recover for a bit but the damage was done.
I am certainly not the person with experience to give you advise but I'll tell you what I think I've learned from the help here.

The soil was one issue (possibly), the idea was that there is a huge demand of soil in the last year,
which possibly causes the soil not to be at desired quality. I switched to coco now to avoid that problem.

Perhaps you might have your "pot lifting" weight wrong, 5 days without watering seems like a long time.
so possibly the bottom of the pot dried out, feeding 500ml to dry soil will only wet the top layer so the bottom roots stay dry, roots growing in dried out soil will stunt the plant. That's what I think happened to me because I was watering very little because I thought I was doing it right.
What they mean with a wet/dry is basically keeping the weight in water as 100%/50%, in general you can't let the soil dry out.
I would water till you barely see runoff and not water until 50% of the water weight is gone, perhaps you could use a scale to be sure.
In general if you take a hand of soil and squeeze it without drops of water it's time to water.
From what people told me the best you can do is repeat watering the full pot and letting it dry untill 50% of the water is gone.
I learned that keeping your soil moist is a skill and although it seems simple (and it is after some time), the internet is full of information that contradicts one another so you end up learning the hard way.

People also mentioned it could be bad seeds, do they all come from the same place?

With that said, they might be hungry but I do think they look stunted,
you said they are at day 22,
I assume they are autoflowers, around day 28 they will start to show signs of flower
At this age they would have to be bigger and you should be starting LST in the next days.

I would start new seeds at this point, even if you can save them, you will be disappointed by the results.
Its better to start over and ask questions on what you are confused about on the forum.

But again, what do I know, I was in the same situation 2 weeks ago and only started my coco grow today so my experience just comes from others on the forum, maybe some experienced people can pick up on my reply.

Anyway good luck : )

I read your thread extensively trying to learn. I sure hope you have great results on this next round, as I understand the frustration you’ve just endured.

I do think underwatering was a big component to my issues. I suspect the pH issues had a lot to do with poor microbial environment. So much is said about overwatering, and many people’s response to any posted concern is “you’re overwatering” so it just gets reinforced. I appreciate your description as I think this will help me better assess the soil status. I know this will eventually be “obvious”, but for now it is amazingly unclear.

I’ve definitely seen some growth each of the days since I “flushed”/thoroughly watered, but I am suspicious as to how much they can comeback. I am watering a larger volume now each time (at 72 hours the top was still wet so I delayed watering. At 84 hours, the tops were dusty...did 750ml watering which yielded a bit of runoff). I split the watering up a bit to give time for the soil to absorb, too, so hopefully that will help.

I started 8 new seeds, 2 each of 4 strains (I figure pairs are good for comparison). Two are ILGM strains and two are Mephisto strains, so that will address your concern about seed suppliers, which I also considered (specifically that Meph is known for their top-notch genetics, and ILGM is known for...supplying beginners!).

I really appreciate your input. I’ll be keeping my fingers crossed for both of our next grows!

 

[Jaydot]

I read your thread extensively trying to learn. I sure hope you have great results on this next round, as I understand the frustration you’ve just endured.

I do think underwatering was a big component to my issues. I suspect the pH issues had a lot to do with poor microbial environment. So much is said about overwatering, and many people’s response to any posted concern is “you’re overwatering” so it just gets reinforced. I appreciate your description as I think this will help me better assess the soil status. I know this will eventually be “obvious”, but for now it is amazingly unclear.

I’ve definitely seen some growth each of the days since I “flushed”/thoroughly watered, but I am suspicious as to how much they can comeback. I am watering a larger volume now each time (at 72 hours the top was still wet so I delayed watering. At 84 hours, the tops were dusty...did 750ml watering which yielded a bit of runoff). I split the watering up a bit to give time for the soil to absorb, too, so hopefully that will help.

I started 8 new seeds, 2 each of 4 strains (I figure pairs are good for comparison). Two are ILGM strains and two are Mephisto strains, so that will address your concern about seed suppliers, which I also considered (specifically that Meph is known for their top-notch genetics, and ILGM is known for...supplying beginners!).

I really appreciate your input. I’ll be keeping my fingers crossed for both of our next grows!

I hope so lol, I bought Floratrio myself for this grow.

I think at this point they will have underdeveloped roots and have little water uptake, so I certainly wouldn't take this schedule in the next grow.
When I had 2 stunted plants and 1 surviving I could notice the different in water uptake.
Honestly if you have your average bathroom scale, I think that would be the best bet for a new grower.
Fill one pot and let it get dried out because in their packaging they still have moisture (if the soil is bone dry when you open the bag the soil is probably not good), and then weigh it, water till run off and weigh again, at that point take 50% of the added weight and weigh your pot everyday.
I think at that point you will learn to understand the water uptake by seeing the actual weigh and learning the feel of the weight.
That's what I planned to do but then went for coco instead.

Yeah your PH was definitely a problem, perhaps that was also because of not saturating deep enough and things building up,
maybe it was just not the right soil for this, you could test it by placing some in a cup and filling it with twice the amount in water so you can test your soil's initial PH and EC. or you just forget about it because you will never buy that brand again lol.
It's alot to learn and frustrating to fail especially if you're new and just spent 1k on equipment while you're looking at grow journals with beautiful buds lol.

Atleast now you have good soil and good nutrients, half way there.
I planted 6 from 4 different seedbanks just to be sure it's not the seeds lmao.

 

[LearningMore]

With regard to these stunted seedlings: they are still growing, but now they’re starting to stretch. I’ve been slowly increasing light intensity daily, but is there a “max” amount to jump in one day? They’re definitely under lower intensity light than they “should” be by age (10000 lux or ~150 PPFD). Thanks.