I know alot of stuff. But there is alot of stuff I just dont know.

Wizzlebiz

Wizzlebiz

Well-Known Member
Good morning folks. I hope your Christmas was safe and great. The wife bought me a 1 year subscription to mystery tackle box. Im super juiced about it.

Anyway on to the topic.

Lights. Indoor lights specifically the relationship to nutrient uptake.

I have been using recipe 420 soil. Red label. I have always used this outdoors with great results. No nute burns no issues.

Using the same soil with these LEDs I am seeing slight nute burns. I am not feeding anything else.

So this is the stuff I dont know about. What is the relationship with LEDs to nutrient uptake vs the sun?

I know im missing something here.

Thanks,
WIZ
 
Beehive

Beehive

Well-Known Member
Fert uptake with LEDs are regulated by humidity and leaf surface temperature.

Here's an example. I run my grow room air temperature at 84°F. At that temp. My lst is 76°-78° during lights on. Using VPD. Humidity is in the high 50's. Coco grow. Currently at 730ppm. I have a temperature schedule.

12am 77°, 6am 76°, 7am 79°, 8am 84°. Lights on at 8am. Off at 1am.

If I want the plants to uptake more fert solution. A lower humidity will cause it. More humidity and the uptake is slower. Its a balance.

Comparing LED to the Sun isn't comparable. Its a synthetic environment with one. Natural with the other. Completely different worlds.
 
Wizzlebiz

Wizzlebiz

Well-Known Member
Beehive said:
Fert uptake with LEDs are regulated by humidity and leaf surface temperature.

Here's an example. I run my grow room air temperature at 84°F. At that temp. My lst is 76°-78° during lights on. Using VPD. Humidity is in the high 50's. Coco grow. Currently at 730ppm. I have a temperature schedule.

12am 77°, 6am 76°, 7am 79°, 8am 84°. Lights on at 8am. Off at 1am.

If I want the plants to uptake more fert solution. A lower humidity will cause it. More humidity and the uptake is slower. Its a balance.

Comparing LED to the Sun isn't comparable. Its a synthetic environment with one. Natural with the other. Completely different worlds.
Click to expand...
Thanks for the response but im not sure this answers the question.

Say I got the conditions absolutely perfect. Would the plant uptake as much and handle this soil as well with no burns as if it were outdoors?

I'm in Northern California. I have only grown outdoors. This is my 1st indoor shot. But the variables here in nor cal outside are a bit brutal. 100+ degree weeks, humidity at 15%-30% most days. Windy, fires, and so on.
 
Beehive

Beehive

Well-Known Member
Wizzlebiz said:
Thanks for the response but im not sure this answers the question.

Say I got the conditions absolutely perfect. Would the plant uptake as much and handle this soil as well with no burns as if it were outdoors?

I'm in Northern California. I have only grown outdoors. This is my 1st indoor shot. But the variables here in nor cal outside are a bit brutal. 100+ degree weeks, humidity at 15%-30% most days. Windy, fires, and so on.
Click to expand...
I can't tell. I've never grown weed outside. I have no experience with natural environments. It'd be interesting to know. Some things might translate over to the synthetic side.
 
JOO©E

JOO©E

Member
Spectrum & environmental conditions. You can match enviro, but your spectrum, uniform intensity, angle of trajectory, ect is not the same as the sun. Dilute your nute ratio (super soil -> inert soil ratio) or increase RH, or both, to offset.
 
Star Dog

Star Dog

Well-Known Member
Here's my theory lol
Hi temps and low humidity saps moisture away, outside that always replaced by capillary action, in a pot there's a finite amount of water, as the water gets used it increases the ppm of what's left in the pot.
 
J

Jimbo the Gael

Well-Known Member
Star Dog said:
Here's my theory lol
Hi temps and low humidity saps moisture away, outside that always replaced by capillary action, in a pot there's a finite amount of water, as the water gets used it increases the ppm of what's left in the pot.
Click to expand...
It also decreases the availability of the nutrients as it gets drier. It's not the same as hydro. Without water there, the roots can't really take up the nutrients in the soil.
 
Renfro

Renfro

Well-Known Member
Wizzlebiz said:
Good morning folks. I hope your Christmas was safe and great. The wife bought me a 1 year subscription to mystery tackle box. Im super juiced about it.

Anyway on to the topic.

Lights. Indoor lights specifically the relationship to nutrient uptake.

I have been using recipe 420 soil. Red label. I have always used this outdoors with great results. No nute burns no issues.

Using the same soil with these LEDs I am seeing slight nute burns. I am not feeding anything else.

So this is the stuff I dont know about. What is the relationship with LEDs to nutrient uptake vs the sun?

I know im missing something here.

Thanks,
WIZ
Click to expand...
Perhaps it's more strain related, is this the same cut youve grown outside?

I was told that LED needs more calcium, haven't seen that in my grow. I haven't ever grown under the sun so I really have little on that subject based on experience.
 
Wizzlebiz

Wizzlebiz

Well-Known Member
Renfro said:
Perhaps it's more strain related, is this the same cut youve grown outside?

I was told that LED needs more calcium, haven't seen that in my grow. I haven't ever grown under the sun so I really have little on that subject based on experience.
Click to expand...
Thats a valid point. No its not the same strains I have grown outside. Definitely something to consider.
 
Y

youraveragehorticulturist

Well-Known Member
What's up with your lights? Are they super bright and intense? Your plants may be too close to the lights. Or maybe you've got your lights dialed up to max intensity and the plants are too small for that.

What's up with the burns? Are they all up high on the plant or down low, or all over?

How do your leaves look, are they dropping or curled up around the edges?
 
Wizzlebiz

Wizzlebiz

Well-Known Member
youraveragehorticulturist said:
What's up with your lights? Are they super bright and intense? Your plants may be too close to the lights. Or maybe you've got your lights dialed up to max intensity and the plants are too small for that.

What's up with the burns? Are they all up high on the plant or down low, or all over?

How do your leaves look, are they dropping or curled up around the edges?
Click to expand...
Lights at 30 inches light was at 60% 100watt led

Burns all over but extremely slight.

Leaves look alright. No glaring issues. IMG_20201226_095955.jpg

Just recovered from a pH issue. So the yellowing is healed up.

The one to the back was pulled today. Was a male.
 
GeneBanker

GeneBanker

Well-Known Member
Pots not in saucers,or on risers ahhhhhhhh. I find when I’m in week 1-3 veg i have to fan the nutes on my indoor grows. After that it’s game on. Both with my hid, and led lights. You prob have a perfect environment TBH so they drawing up good.51D55A9B-86A5-4C56-B4AF-066C5B79FC05.gif
 
MICHI-CAN

MICHI-CAN

Well-Known Member
Wizzlebiz said:
Good morning folks. I hope your Christmas was safe and great. The wife bought me a 1 year subscription to mystery tackle box. Im super juiced about it.

Anyway on to the topic.

Lights. Indoor lights specifically the relationship to nutrient uptake.

I have been using recipe 420 soil. Red label. I have always used this outdoors with great results. No nute burns no issues.

Using the same soil with these LEDs I am seeing slight nute burns. I am not feeding anything else.

So this is the stuff I dont know about. What is the relationship with LEDs to nutrient uptake vs the sun?

I know im missing something here.

Thanks,
WIZ
Click to expand...
Monkey..wrench. My wife's method to get me out of the house. Nothing truly wrong as aware. But got you.

My honest opinion is the increased metabolic need overloads the actual processing ability in smaller plants. Just my inclinations after scratching bald patches.
 
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