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Sammy2dope

Active Member
I have 10 plants under a high 600watt led and having some issues here some pics can anyone tell me what's going on and what I'm doing wrong I'm using pro mix organics
 

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Thurston

Well-Known Member
You need to provide more information.
list of things added to nutrient feed.
How often do you feed?
Ph and ec of feed.
Have you captured any runoff for ph and ec measurements?
 

Sammy2dope

Active Member
I'm using general organics bio thrive and bio root and cal mag I have been pH my nutrient solution and I'm feeding 2times then 3rd time just pH water not doing a ec. Did do a run off ph test today and Iwas reading. 5
 

Finn15

New Member
Yo, with a 600W LED, make sure it’s at least 20–24 inches away or you might fry your plants.Pro Mix Organics is great, but after a few weeks, you gotta add nutrients.Check your water pH; Pro Mix likes it around 6.0–6.5 for best results.I had the same issue—light was too close, and pH was screwing up nutrient uptake.Get a cheap pH meter; it’s a game changer.Also, throw in some Cal-Mag, LEDs suck it out of the plants like crazy:weed:.
 

Sammy2dope

Active Member
Yo, with a 600W LED, make sure it’s at least 20–24 inches away or you might fry your plants.Pro Mix Organics is great, but after a few weeks, you gotta add nutrients.Check your water pH; Pro Mix likes it around 6.0–6.5 for best results.I had the same issue—light was too close, and pH was screwing up nutrient uptake.Get a cheap pH meter; it’s a game changer.Also, throw in some Cal-Mag, LEDs suck it out of the plants like crazy:weed:.
I have mine 30 in away and I just bought a ph meter waiting for delivery now but NY water run off is at 5 and I dont understand how it got like that cause I always ph my water and nutrient I put some agricultural lime on the pro mix sk hopefully it will rase my ph
 

Sammy2dope

Active Member
I have mine 30 in away and I just bought a ph meter waiting for delivery now but NY water run off is at 5 and I dont understand how it got like that cause I always ph my water and nutrient I put some agricultural lime on the pro mix sk hopefully it will rase my ph
And I always use calmag
 

bignugs68

Well-Known Member
Looks like deficiency's across the NPK board. N bc the very light green/yellow everywhere - though LED grow lights do accentuate that apperance so its usually not as bad as it looks. Potassium deficiency because of edge burn/browning. And Phosphorus bc the blotchy random browning through some of the leaves. If your pH is really 5, that would reduce the absorption of those nutrients, making pH nute lockout the culprit.

For a flush, IDK. I've heard 3x the water you normally would give, and I've heard 3x the volume of your pots. 9 gallons of water if you have 3gal pots. Always seemed like an awful lot to me. The one time I flushed I just did 3x what i normally watered. 3gal of water, and it did the trick. Be your own judge bongsmilie

Personally i just take my pots to the bathroom, lower my curtain rod to rest on the tub surround walls, tie strings around the handles on the pot(i use fabric pots) and flush away.
 

pegboy

Well-Known Member
I have mine 30 in away and I just bought a ph meter waiting for delivery now but NY water run off is at 5 and I dont understand how it got like that cause I always ph my water and nutrient I put some agricultural lime on the pro mix sk hopefully it will rase my ph
Nutrient/salt build up.
 

bignugs68

Well-Known Member
OP, pro mix Organics is primarily composed of peat moss, which is known to lean acidic. I'd say being a peat moss, and you're feeding twice watering once is what did the trick, especially if you're feeding a recommended dosages. But most people recommend using half or less than half the recommended dose to figure out what the plant wants, and in my experience that works out best.
 
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Sammy2dope

Active Member
Looks like deficiency's across the NPK board. N bc the very light green/yellow everywhere - though LED grow lights do accentuate that apperance so its usually not as bad as it looks. Potassium deficiency because of edge burn/browning. And Phosphorus bc the blotchy random browning through some of the leaves. If your pH is really 5, that would reduce the absorption of those nutrients, making pH nute lockout the culprit.

For a flush, IDK. I've heard 3x the water you normally would give, and I've heard 3x the volume of your pots. 9 gallons of water if you have 3gal pots. Always seemed like an awful lot to me. The one time I flushed I just did 3x what i normally watered. 3gal of water, and it did the trick. Be your own judge bongsmilie

Personally i just take my pots to the bathroom, lower my curtain rod to rest on the tub surround walls, tie strings around the handles on the pot(i use fabric pots) and flush away.
I'll give it a try thanks for the advice
 

Finn15

New Member
If you're dealing with NPK deficiencies, it's definitely worth checking your pH first. A pH as low as 5 can block nutrient absorption, and that’s probably the main issue here. As for flushing, I agree that using 3 times the pot size volume seems a bit much, but it seems effective:).
When it comes to feeding, starting with half of the recommended dosage is a great idea. Plants tend to react better to lower doses, and it reduces the risk of nutrient burn. Always check your water and soil pH, as that’s key to healthy growth;).
 

chuckeye

Well-Known Member
I have 10 plants under a high 600watt led and having some issues here some pics can anyone tell me what's going on and what I'm doing wrong I'm using pro mix organics
ProMix Organic is
  • Sphagnum peat moss (60-70% by volume)
  • Perlite
  • Coir
  • Ground Limestone (for pH adjustment)
  • Wetting agent
  • Mycorrhizae
With ProMix you do not need to ph adjust your feed !

The limestone will buffer the ph and you did not need to add more to the mix.
I'm using general organics bio thrive and bio root and cal mag I have been pH my nutrient solution and I'm feeding 2times then 3rd time just pH water not doing a ec. Did do a run off ph test today and Iwas reading. 5
Are you following their feeding schedule for amounts ? https://generalhydroponics.com/resources/biothrive-feedcharts/

When I use GH Maxi series I'm usually at just a little less than the recommended amount and in ProMix HP I do not ph my water !

What is your waters starting ph ? Mine is 7.5 before adding nutrients, can't remember what it is after. I never check ph in or run off.

I feed with every watering right to the end.

When I have pushed the feed too far I flush with 3 gallons of water for a 3 or 4 gallon bag. Put the bag on two sticks over a 5 gallon pail.

Slowly run through 2 gallons of just water, let it drain for bit and then run through one gallon with nutrients.

It does appear you have a lock out and not a light issue. IIRC at your growth stage I was at 18" and 60% power on a Phlizon 640w bar light.

It also looks like your bags are sitting directly on the floor ?

I use saucers and plant elevators, the saucers catch the run off and the elevators let the bottom of the bag breath And not reabsorb the run off.

At least a small amount of run off will help flush excess salts.

This is my current grow, a little farther ahead but I am using nothing but Mega Crop one part, no ph down, no Cal/Mag.

And my well water ppm's are ~500, ph is 7.5

Light is @100%, tallest buds are 3" away from the bars. Shorter ones range from 7" - 11" :o

7" fan on the floor at the back pointing slightly up and counter clockwise, oscillating fan in front.

Exhaust is set to come on at 77 to keep the humidity down to 54%...

Day 42 of 83 The Girls high 8 Dec.jpg

Cheers and Good Luck !
 
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