Seedling stumped 3rd fail with pics aero

[hugyourbong]

Hi,
I have a true aero system. 2 seconds on 4 mins off. start seedlings in rock wool. No nutes first week. 450ppm 2week. 300w LEDS 4inches from top of plant with fans. LED is 7 bands with more reds than blues. Plants look great for about 10 days then, stem thins and darkens and leave begin to invert themselves but still green on the top(even though their upside down). PH 5.7 water temp 71. stems look like they are chocking but the roots look white and yummy? Any ideas? When is a seedling no longer a seedling? Thanks for any help insight or ideas.

 

[homegrwn]

had same issue I moved the light to 8 inch and it stop frying the seedling. also try using superthrive mix with water and soak cubes.

 

[jfart]

agree with homegrwn. looks like a temp issue.
what kind of light are you using?
how close is it?
what are the temps in your room?

 

[Jimdamick]

I would back the light off to 12" at least, and when the cotyledons wither and die, that is when I consider it a plant.

 

[bass1014]

also youdont need any nutes for that baby.. you might as well throw a steak in there too.there newborn babies ,, your feeding steak to a baby.. water water water.. when it starts getting a true set of branches thn throw some juice in there but until then ease up on the juice..

 

[BigEasy1]

I'd say your light is way too close. I keep my BlackStar Chrome 270 close to 30 inches above the canopy.

 

[homegrwn]

I would back the light off to 12" at least, and when the cotyledons wither and die, that is when I consider it a plant.

yeah at least and then you can adjust it if your hand is under it and its burning fast its to close

 

[tikitoker]

I like to keep my 300w full spectrum panel at least 20" for seedlings. Let them stretch an inch or two and then drop the light 6" at a time. Temps are higher with leds as there is no radiant heat like when using hid. 82 is fine for ambient/canopy. I too grow with true hpa. My intervals are a tad shorter than yours but this is all dependant on strain and Age. Hpa uses 30% less nutrient because its atomized and feed at the exact moment of need. Without a leaf sensor irrigation control module to detect plants rate of transpiration and when to deliver the .5 second burst dialin in hpa is difficult and at least for me very involved and demanding. I am always in my garden monitoring leaves. When the droop I have to redial the solenoid timers and res uhh lts still aren't what they could be with the appropriate equipment. The leaf sensor is very $$$$$. And the use of 3 doeser hooked inline with the spray lines to mix nutrients as they are needed mataining 100% controll on nutrient ph. Coupled with the fact that led lit gardens will also use less nutrient strengths. If I were you just based on my current experince with TAG HPA I would just do a dwc with the 300w

 

[tikitoker]

I'd say your light is way too close. I keep my BlackStar Chrome 270 close to 30 inches above the canopy.

All led panels are gonna vary in optimal height as environmental conditions and age/vigor create constant variables. Also one of the most overlooked variables is the actual power that the panel uses and the degree of lens and the diode wattage. A for sure is way of optimal panel distance is to keep it a tad higher and lower until stretching stops. Problem solved.

 

[AimAim]

OK, yesterday you posted a question on a thread you started saying you were down to your last seed: https://www.rollitup.org/marijuana-plant-problems/746103-seedling-emerged-yellow-help-my.html

Now you are offering up advice? Like the quote below? When in fact you can't get one plant going and are down to one seed ?

I like to keep my 300w full spectrum panel at least 20" for seedlings. Let them stretch an inch or two and then drop the light 6" at a time. Temps are higher with leds as there is no radiant heat like when using hid. 82 is fine for ambient/canopy. I too grow with true hpa. My intervals are a tad shorter than yours but this is all dependant on strain and Age. Hpa uses 30% less nutrient because its atomized and feed at the exact moment of need...... Blah Blah Blah and more blah bullshit

 

[tikitoker]

OK, yesterday you posted a question on a thread you started saying you were down to your last seed: https://www.rollitup.org/marijuana-plant-problems/746103-seedling-emerged-yellow-help-my.html

Now you are offering up advice? Like the quote below? When in fact you can't get one plant going and are down to one seed ?

Lmao- no worries man. If I did infact give any wrong or bad advise please state that then. My luck with sprouts lately has been not so well so I asked for some help on the last indica dominant seed I have. Thank you for helping me in my post and shitting on me in another. Since my seed has not even hit dirt yet the possibility for it to go into my HPA is very likely, so please be careful what you say is bullshit as I have no problem proving myself or skill.

 

[tikitoker]

Do you even know anything about true aeroponics or even hydro for that matter? Not to mention that it looks like you only grow in dirt. LOL MG fertilizer? AND MG dirt, not the highest quality control made soil but if you like bugs then, that's cool. Yaaah, go ahead an run your blue ribbon nutrients through hydro. Let me know how that works for ya. Turd.

 

[wwwillie]

Disclaimer: I am very to to this...
I have a 240 watt LED, it is 22" from my seedlings in soil, they look ok (have other issues like my cat ate it, etc.) Everything I read says LEDs need to be further than the 4" you stated in your post. A lot say around 22" is good, with a 300 watt maybe a bit more. It is my thought the the back of the hand test may not be very accurate for LED as they do not get nearly as hot as HID, but I could be wrong.
Hope this helps.