4 week old plants aggressively praying(question about far red initiator)

undergr0

undergr0

Member
Almost all of my new plants are praying aggressively the entire lights on, I feel like its light stress but I have the light turned way down and way above the canopy. I am running the far red puck at lights on and off, I'm wondering if I should only run it at lights off. I already found out running it the entire time causes mad stretch in seedlings the hard way.

Grow Info:
Seeds broke the ground January 14th, in 2 gallon smart pots, been running 12/12 for 2 weeks, 4 Chilled pucks with a 320 watt driver turned down to 170 at 24", far red puck at center of fixture run for 20 minutes before and after light change, in a 3x3 tent.

Does anyone know what could be causing it or more about when to use the far red pucks?
 
Ohwolfie

Ohwolfie

Well-Known Member
undergr0 said:
Almost all of my new plants are praying aggressively the entire lights on, I feel like its light stress but I have the light turned way down and way above the canopy. I am running the far red puck at lights on and off, I'm wondering if I should only run it at lights off. I already found out running it the entire time causes mad stretch in seedlings the hard way.

Grow Info:
Seeds broke the ground January 14th, in 2 gallon smart pots, been running 12/12 for 2 weeks, 4 Chilled pucks with a 320 watt driver turned down to 170 at 24", far red puck at center of fixture run for 20 minutes before and after light change, in a 3x3 tent.

Does anyone know what could be causing it or more about when to use the far red pucks?
Click to expand...
From my understanding, you are only supposed to run that far red initiator for 15 minutes before the lights kick on, and 15 minutes after.

What's the humidity like in your tent?
 
undergr0

undergr0

Member
Ohwolfie said:
From my understanding, you are only supposed to run that far red initiator for 15 minutes before the lights kick on, and 15 minutes after.

What's the humidity like in your tent?
Click to expand...
524C6706-1414-4BA8-980A-13C8C59377E3.jpeg
We’ve had a +30 degree temp swing the last few days, that max of 84 is an outlier.

My smart plug says the light is pulling about 90 watts now, I’ve had it turned down about an hour and little to no change.
 
undergr0

undergr0

Member
SSGrower said:
Personally, Id lower the light or turn it up, probably turn it up based on the temp reading.

Edit,
Reds can be run overlap ing regular daytime I overlap by an hour, but 20 min before and after seems a bit much, I do 15.
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So the red comes on 15 before lights on and runs for 5 after then 5 before lights out and runs for 15 after. I had it running 15 before lights on and staying on until 15 after lights out, but that caused some crazy stretching, apparently too much far red can make the plant think it’s in the shade and the chilled pucks already have some red diodes.
 
SSGrower

SSGrower

Well-Known Member
undergr0 said:
So the red comes on 15 before lights on and runs for 5 after then 5 before lights out and runs for 15 after. I had it running 15 before lights on and staying on until 15 after lights out, but that caused some crazy stretching, apparently too much far red can make the plant think it’s in the shade and the chilled pucks already have some red diodes.
Click to expand...
It can but it's more about the ratios. What is the color and wattage of the lights, im not familiar with the details of either the chiled or puck.
 
C

CannaCountry

Well-Known Member
Praying is what we all want to see...you're only problem is you have too much time on your hands to worry. Your girls look fantastic! Steady goes the course my friend; good luck!
 
boilingoil

boilingoil

Well-Known Member
I run far red diodes the whole lights on cycle for my flowering plants. At the onset of flower I run my strips close to the canopy with around 50% out put and slowly raise them and turn up the output as the stretch slows.
 
whytewidow

whytewidow

Well-Known Member
If your running logic pucks. Which have white diodes. You really should raise your temp. 73° is too cold for white leds. And they use alot more calmag. Mostly Mag under leds. That's why you're getting the light yellow on your veins of the fans. They need a touch more mag. A dose of Epsom will work if you dont have calmag. Plus calmag has N in it. But right now they are happy. But as flowers form and they start drinking alot more. It will show in the plants. You're gonna start having problems more than likely. But maybe not. But most people running these types of leds. Run warmer rooms. Although that may be different if your running any type of IR/UVA/UVB. Bc leds dont put out much heat. The leaf temps are lower. Therea a few vpd charts on this site for white diodes.

Edit: but other than the slight yellowing. They look healthy n lush.
 
Tuckatan

Tuckatan

Well-Known Member
The fan leaves facing upwards ‘praying’ and reducing the amount of light exposed chlorophyll is not a sign that everything is great and your plants are happy. Happy plants don’t reduce the surface area of their leaves to slow down photosynthesis.

Your plant must be getting too much light or heat, or low humidity, or something similar, or your leaves would be wanting to catch as much light as possible, not protecting themselves, in my opinion.
 
macsnax

macsnax

Well-Known Member
Plants pray because they're happy and liking their environment. I have noticed in the past they pray extra hard when the light is too far away. They're reaching for more light buddy. Lower your light and turn it up some.

Edit; whytewidow is right about your temps too. I set my environment at 82f with my white light cobs.
 
Last edited:
undergr0

undergr0

Member
'
whytewidow said:
If your running logic pucks. Which have white diodes. You really should raise your temp. 73° is too cold for white leds. And they use alot more calmag. Mostly Mag under leds. That's why you're getting the light yellow on your veins of the fans. They need a touch more mag. A dose of Epsom will work if you dont have calmag. Plus calmag has N in it. But right now they are happy. But as flowers form and they start drinking alot more. It will show in the plants. You're gonna start having problems more than likely. But maybe not. But most people running these types of leds. Run warmer rooms. Although that may be different if your running any type of IR/UVA/UVB. Bc leds dont put out much heat. The leaf temps are lower. Therea a few vpd charts on this site for white diodes.

Edit: but other than the slight yellowing. They look healthy n lush.
Click to expand...
I might need to get a small space heater for the tent. I'm going to try raising the light a little more then turning it most of the way up to raise the temps for now. I'll top dress with Sul Po Mag to try and get ahead of the mag deficit, I have epsom salt also if that doesn't work fast enough.
 
Thundercat

Thundercat

Well-Known Member
undergr0 said:
'

I might need to get a small space heater for the tent. I'm going to try raising the light a little more then turning it most of the way up to raise the temps for now. I'll top dress with Sul Po Mag to try and get ahead of the mag deficit, I have epsom salt also if that doesn't work fast enough.
Click to expand...
You really shouldn't need to raise that little light past 24 inches. Every 12 inches you get it away from your plants decreases the light by more then half, look up the inverse square law. Those plants don't need less light. Getting the light closer will also raise the leaf temp if you want temps to go up. As will turning it up.
 
whytewidow

whytewidow

Well-Known Member
Thundercat said:
You really shouldn't need to raise that little light past 24 inches. Every 12 inches you get it away from your plants decreases the light by more then half, look up the inverse square law. Those plants don't need less light. Getting the light closer will also raise the leaf temp if you want temps to go up. As will turning it up.
Click to expand...
100% true statement.
 
undergr0

undergr0

Member
Well I lowered the light to about 18", turned it up, cut off one of the two fans blowing in the tent, and cut the exhaust fan down as low as it would go. My leaf surface temps were about 76-77 immediately after making the changes per my IR thermometer, I'm going to go check in an hour and see how things look. I appreciate everyone's help and advice. This is my first grow with high efficiency LEDs, I'm running HPS and CMH in my living soil tent.

My only concern is that the shorter plants(furthest from the light) are the flattest. There seems to be a direct correlation between how extreme they are praying and how close they are to the light.
 
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