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Anyone know why my seedlings are leggy

  • Thread starter Thread starter NapkinB
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Anyone know why my seedlings are leggy

NapkinB 141 Replies 17,721 Views
Page 3 of 8 · Replies 41–60 of 142
#41
Aqua Man said:
What temp are you running and do you see much purpling on the stem or branching more so in the light exposed areas?
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I’m running 81-73 usually. There is no purple right now. Debating on watering actually because the weight for the other plants is a couple grams close to where I watered them at. And the app is actually correct I think. It said to create a diffuser to put over the camera to spread the light evenly and it started to read about 4200. The seedlings are about 9 days old from planting too.
 

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#42
NapkinB said:
I’m running 81-73 usually. There is no purple right now. Debating on watering actually because the weight for the other plants is a couple grams close to where I watered them at. And the app is actually correct I think. It said to create a diffuser to put over the camera to spread the light evenly and it started to read about 4200. The seedlings are about 9 days old from planting too.
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Yes you must use a diffuser that much I know for apple. Sorry should have said something. You may even want to back it off to about 3500
 
#43
Aqua Man said:
Yes you must use a diffuser that much I know for apple. Sorry should have said something. You may even want to back it off to about 3500
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All good haha. You think I should? Is 4200 too high? Not sure how much lux they should really be getting I’ll have to read more about it.
 
#44
So eg to Support that it’s not the light intensity causing the stretch. See recommendations here and anywhere you look for that matter, I just plucked it for you.

41AD2BFC 74F1 4BB2 B01A 4AE9EA2872BF

You are sitting at

0B82A0B9 F04C 4C80 8681 4BD8571049BF


so you can see 10000000% your issue is NOT intensity as Mr. 40 (aka bafoon) year acclaimed gardener might suggest.

honestly I’d back it off a bit, if anything it will slow growth and health of your plants pushing to hard
 
#45
Aqua Man said:
So eg to Support that it’s not the light intensity causing the stretch. See recommendations here and anywhere you look for that matter, I just plucked it for you.

View attachment 1237240
You are sitting at

View attachment 1237242

so you can see 10000000% your issue is NOT intensity as Mr. 40 (aka bafoon) year acclaimed gardener might suggest.

honestly I’d back it off a bit, if anything it will slow growth and health of your plants pushing to hard
Click to expand...
Okay I backed it off to 3,500. Do you know what could be causing stretching then?
 
#46
One day ima sit down and do an article in lighting and include much of this so I don’t have to go through all of this each time I dare drop in on a thread.

After I get the new business up and launched with my new systems that is.
 
#48
NapkinB said:
Okay I backed it off to 3,500. Do you know what could be causing stretching then?
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That puts you about 300 so just pay attention for any light bleaching or signs of stress. Cause you pushing hard even at that but if all else is good environmentally then it should be ok. Go by plants as number are a guide but respect the numbers of the upper end of the guidelines
 
#49
Aqua Man said:
But of course…. spectrum and genetics. But I really don’t see what is considered excessive stretching so I’d just stay the course my friend
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Okay thanks👍🏻 I’ll just try not to kill them with under and over watering now haha
 
#50
NapkinB said:
Okay thanks👍🏻 I’ll just try not to kill them with under and over watering now haha
Click to expand...
Hey if this shit was easy everyone would be rockin it. Just keep at it and question everything. Even myself… learn the whys behind the advice and you will have tools for life.
 
#51
The hypocodyl - the region below the codyledons, it will stretch until the leaves receive blue & red light and then this creates a hormone change which will cause a number of photomorphogenetical changes, like growing of true leaves, stem thickening instead of elongation, adventitious root formation etc pp. But it's important to understand that hormones travel slowly through the sap, so there's always a delay.... everything with plants is slow so that's why just letting them grow is oftentimes best... they can adapt to alot of various conditions anyway
I think your seedlings will grow fine though I dislike blurple, just 2 colours is not really good... but as you can see the upper 2 nodes are already fairly close... and the stem will thicken up more later...
 
#52
N1ghtL1ght said:
The hypocodyl - the region below the codyledons, it will stretch until the leaves receive blue & red light and then this creates a hormone change which will cause a number of photomorphogenetical changes, like growing of true leaves, stem thickening instead of elongation, adventitious root formation etc pp. But it's important to understand that hormones travel slowly through the sap, so there's always a delay.... everything with plants is slow so that's why just letting them grow is oftentimes best... they can adapt to alot of various conditions anyway
I think your seedlings will grow fine though I dislike blurple, just 2 colours is not really good... but as you can see the upper 2 nodes are already fairly close... and the stem will thicken up more later...
Click to expand...
see if I could words together like this I’d probably save myself a lot of hassle. 100% what this man said
 
#53
NapkinB said:
Okay thanks👍🏻 I’ll just try not to kill them with under and over watering now haha
Click to expand...
Not a problem, your weights are spot on at 160 and 230, four or five days to dry. You got it, the leaves just go up and down all the time besides after watering when they get heavy. Next time get a couple clear cups to watch roots and water dispersion.
 
#54
Some things that cause stretching in plants are;
1) red heavy light spectrums( we use this to our advantage during flower)
2) to weak of light source ( causes plants to stretch toward a stronger source, this is how the tilt and change directions when grown outdoors and being shaded by another plant, they simply try to grow to a spot with stronger sun)
3) too large a difference in temps from light to dark times
4) lack of wind makes the stems grow thinner

Things that can help minimize stretching;
1) blue heavy light spectrums (4500-6000k led, blue blurples, 4500k+ fluorescents, metal halides etc)
2) light needs to be within the range of getting good growth without burning the plants. ( This is relative to the type of light and the strength of said light. LEDs are better measured by ppfd where Metal Halides are better measured with lux just to further complicate things)
3) keep day and night temps within 2-4 degrees at seedling stage to help keep short.
4) a gentle breeze in the room/tent helps the stems to grow thicker to combat the wind.

All is these things are relative to genetics and plant stage of life, meaning some plants just like to stretch more at certain stages than others. I would say the best advice is to do what you can to mitigate the things you don't want to happen and bury the damn stems when they do their own thing... It happens now and then. We are trying to ask living things to do as we say with absolutely no visible or verbal communication. Every input is a coded message to the plant. Just my $.02
 
#55
I don’t mind a little stretch, just add more medium and grow more roots. Bury em right up to the cotyledon if necessary.
 
#57
Hey my humidity won’t go past 35-40 now and I have a humidifier in the tent. It was 65% but for some reason it hasn’t gone past that. Are those levels okay or should I get a different humidifier and do you have any suggestions on which humidifiers work best. I also can’t keep my exhaust fan on without the humidity going down to like 20 and it’s only about 50cfm which is about what my tent needs. It’s just a $11 dollar store fan because I can’t find any fans that have low enough cfm because my tent isn’t big enough and should have about 40cfm. The fan hasn’t been on for the past 10 days they’ve been growing just so I can keep the humidity up even if it’s only 35-40.
 
#58
NapkinB said:
Hey my humidity won’t go past 35-40 now and I have a humidifier in the tent. It was 65% but for some reason it hasn’t gone past that. Are those levels okay or should I get a different humidifier and do you have any suggestions on which humidifiers work best. I also can’t keep my exhaust fan on without the humidity going down to like 20 and it’s only about 50cfm which is about what my tent needs. It’s just a $11 dollar store fan because I can’t find any fans that have low enough cfm because my tent isn’t big enough and should have about 40cfm. The fan hasn’t been on for the past 10 days they’ve been growing just so I can keep the humidity up even if it’s only 35-40.
Click to expand...
@Aqua Man
 
#59
prob Sensor placement and imo get the humidifier out of the tent. It has no time to mix with the air before being sucked out anyhow. Humidity the room tthat the tent is in.

where is your sensor placed pics please
 
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