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How to stop foxtailing?

COS

Active member
I'm noticing more fox tailing and leaf under LEDs than my hid lights.

Am I just not giving them enough light? This is one plant under 250 watts samsung led qb. :(
 

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exploziv

pure dynamite
Administrator
Veteran
How far is the light? If you can lowerthe the temp a bit, for sure it would be better for them. But foxtails are sometimes genetical.
 

Hammerhead

Disabled Farmer
ICMag Donor
Veteran
IMO 400w Max in a 3x3 tent.. I'm surprised you can get that warm under a 250w LED. If you can lower the temp a bit it will help.. Growing under LED is not the same as HID. You will go through a learning curve.. I'm going through this myself. What made my plants happy under HID isn't doing the same under LED. I have to learn new habits and stop my old ones. NOT EASY after so many decades using HID.
 

Ca++

Well-known member
Looks like a bit of re-vegetative growth. Like you didn't turn the lights off one night. Or have been looking at them at night.

Sure it's 12/12? Knocked timers are quite common.
 

Ca++

Well-known member
Look around 7-10 days ago. It would take a few days to stretch out then fill to this extent

Edit: I'm not sure your data rate would catch a 15 minute lighting issue. It's missing some finer details. I don't recognise what you are using, but don't see anything about the time. I see cyclic behaviour, but where is your lighting timer?
 
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COS

Active member
I don't use a timer, its controlled through a digital switch on the wifi network within the program, and its on a backup UPS as well incase of power loss, I looked 2 weeks back on my PC for better resolution without seeing any issues.

The only time I've been n the room with the lights out was 3 days ago to look for light leaks because I was for sure I may have one but couldn't see anything after 45 mins letting my eyes adjust.

The only way to adjust the timer is to login to the network and unlock the set time.
 

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COS

Active member
Hammerhead your spot on with the LED learning curve. Been an HID grower for over 10 years and like you said what works for HID don't work with LED. It would have been easier to learn LED grows if I hadn't been growing under HID all these years and applying that experience to LED.
No wonder the new growers love the LEDs so much.
 

Ca++

Well-known member
I'm not seeing any fox tails here. I'm seeing the second push. Which comes from excess. The trigger would normally be heat or light, but both seem unlikely. High feed remains possible. I didn't realise it was the N component that does this. I have done it with a qb but it was a susceptible strain. Perhaps 150mm from the panel.

Light seems most likely with this level of fresh growth. I would change my door locks :)
 

Redrum92

Well-known member
Ive done this too many times, and as others have said- nitrogen too high/nutrients too hot/PH off, not enough air movement, or lights too close. Usually a combo. Not necessarily traditional foxtailing, but similar. Some strains are prone to it, like anything.

For a grow that size, good amounts of fresh air is a safer bet than co2
 
IMO 400w Max in a 3x3 tent.. I'm surprised you can get that warm under a 250w LED. If you can lower the temp a bit it will help.. Growing under LED is not the same as HID. You will go through a learning curve.. I'm going through this myself. What made my plants happy under HID isn't doing the same under LED. I have to learn new habits and stop my old ones. NOT EASY after so many decades using HID.
What do you find you need to do differently?
 

exploziv

pure dynamite
Administrator
Veteran
More food, more cal mag, good leds to plants distance for good and quite average ppfd over whole canopy. You basically need to tune the recipe for more light intensity. And if temps are high you need to make sure u get enaugh water and not too much nutes through the plants.
 

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