When your plant HATES LEDS..

Have you ever switched lights and experienced plant shock?

  • -Never

  • -Yeah, no big deal

  • -Yeah, it was disastrous!


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Olive Drab Green

Well-Known Member
Just saying its nothing to do with LED. The better your environment the more nutrients, Cal/Mag included, your plants use. So I'm agreeing with you. I'm saying I don't understand why so many people have cal mag issues. I'm no expert gardener. But I don't have cal mag issues, period.
I would speculate a lot of it has to do with overwatering Coco.
 

pop22

Well-Known Member
I am running 8 auto pots and against reccommendation, I run semi-organic nutes from Grow More, Sea Grow 16-16-16 and Hawaiian Bloom 5-50-15. In late veg and thru flower, I need to fill my reas every 7-10 days. I've yet to have a problem. I made spare hose harnesses so if I do get a clog, I just swap hoses,take 2 minutes. I then use a 20ml syringe and flush the hoses.

This plant is in a 3.9 gal auto pot. she's at about 6 weeks of flower

Shining Silver Haze ( Royal Queen )

shining Silver Haze pic2 -11-3-2016.jpg


I like the idea of Auto Pots but wonder if they would allow my neuts to settle in the res. and give my plants a hot shot. How does that work?
 

A.K.A. Overgrowem

Well-Known Member
I am running 8 auto pots and against reccommendation, I run semi-organic nutes from Grow More, Sea Grow 16-16-16 and Hawaiian Bloom 5-50-15. In late veg and thru flower, I need to fill my reas every 7-10 days. I've yet to have a problem. I made spare hose harnesses so if I do get a clog, I just swap hoses,take 2 minutes. I then use a 20ml syringe and flush the hoses.

This plant is in a 3.9 gal auto pot. she's at about 6 weeks of flower

Shining Silver Haze ( Royal Queen )

View attachment 3825036
Nice. What PPM you giving those high value neutz. at?
 

pop22

Well-Known Member
because auto pots supply a constant level of ppm to the rootzone, high ppms quickly leads to toxicity. This girl is sucking down over a gallon a day in 70F room temperature. At 600 ppms, some of my plants were so dark green, they bordered on N toxic! I see a very slight lightening of her color now she's on bloom nutes. She smells like diesel fuel and shoe polish.
 

Fevs

Well-Known Member
I agree plants grown under led get more calcium or magnesium problems, but then there is quite a big difference in the feeding times. If say 2ml cal mag was added to a hps grow, which takes 3 days for the soil to dry, then how would 2ml cal mag work in soil under an led grow, that takes 6 days to dry?

Last grow I used cmh only and didn't use cal mag once. I have recently added led. I used to epsom salts leaf spray feeds when I grew under led before. May take that up again.

I think with led, it's much easier to overwater. You just don't have the heat that will help offload extra water, like hps does.

Also many led growers use their leds way too close, which in turn makes the leaves dry up and go crispy. Then they blame calcium or magnesium :lol:

In the summer I'm going to do a few tents with 100% led. But not 50w per sq ft, more like 20w. If you need 50w per sq ft of hps which is what 8%-13% useable light, then 20w per sq ft of complete targeted par light is more than ample.

On the note of the plant drying out slower. I used to feed auto's at 8ml per 1 liter, which is double the strength of the maximum shown on the bottle. Some of the best plants I ever grew!

Try it on one of your led plants with double the nutes! Not in veg though, you will risk nitrogen toxicity. In bloom the plant just takes what it wants with regards to organic bloom, not synthetic bloom.

Just feed double strength, but the key to this working is getting run off. You must wash all the crap out from the last feed or you will get problems!

I grew some seriously fat buds on double strength bloom feeds. I think the plants are less likely to suffer a deficiency that way.
 
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