hps to led problems

M

madas26

Active Member
hi all, after years of hps i decided to buy a led 720w ,so i have 2 wilma systems side by side, one with 600 hps and the other using my new led 720w
they a both 4 weeks into flower,and both getting tret exactly the same ,nutes,watering times etc
the plants under the hps are fine,and looking really healthy,but the ones under the led light are looking a little lime green and a bit veiny
could anyone help im 4 weeks in to flower,they are not in tents,but both in the same room
il try and get sum pics
 
Horselover fat

Horselover fat

Well-Known Member
^ yup. Sounds like just a bit too much light for the plants. Also look at the plants under the same light to make sure what you are seeing is not because of the different colour light.
 
Dirt_McGirrt

Dirt_McGirrt

Well-Known Member
Lower heat, LEDs should be 8"-24" depending on strength and growth period. People are finding that LEDs make your plant go through more cal/mag, too.

For heat when I need it, I have a small USB fan blowing down from the lamp onto the plant. Push some of that driver heat down.
 
Friendly_Grower

Friendly_Grower

Well-Known Member
HPS fan here.

Mix and match?
Folks can say that HPS is your grandfather's grow lights but they sure have their positives.
I dono, my design for the flower room has HPS augmented with Corn Cob LED

I mean we are simulating the Sun after all.
Good reading from those in the know in this thread so I thank you.
 
7CardBud

7CardBud

Well-Known Member
Dirt_McGirrt said:
Lower heat, LEDs should be 8"-24" depending on strength and growth period. People are finding that LEDs make your plant go through more cal/mag, too.

For heat when I need it, I have a small USB fan blowing down from the lamp onto the plant. Push some of that driver heat down.
Click to expand...
My personal hunch....I think LEDs may slow nutrient uptake and the Cal/Mg issues show first.
 
Dirt_McGirrt

Dirt_McGirrt

Well-Known Member
Only one I've had issues with is cal/mag. I'm in coco with distilled water, too. So there's that. Running ol reliable GH.
 
coreywebster

coreywebster

Well-Known Member
madas26 said:
hi all, after years of hps i decided to buy a led 720w ,so i have 2 wilma systems side by side, one with 600 hps and the other using my new led 720w
they a both 4 weeks into flower,and both getting tret exactly the same ,nutes,watering times etc
the plants under the hps are fine,and looking really healthy,but the ones under the led light are looking a little lime green and a bit veiny
could anyone help im 4 weeks in to flower,they are not in tents,but both in the same room
il try and get sum pics
Click to expand...
Give us more detail.

Space each light is covering.
Light distance from canopy.
Brand and model or type of light.
Air temp
Nutrient strength.
Ph

And yeah, pics would help
 
G

GrodanLightfoot

Well-Known Member
Led growers (on the internet) be like:

1) Dark plants are awesome, needs more calnit, pk boosters bad! Borax bad!

2) It's so frosty, look at all the calcium carbonate in the trichs. Much frostier under my led smartphone flash than silica trichs.


3) I prefer smoking the lower, shaded buds. I also take photos of lower buds because my tops are too fucked up.


4) I love all the dumb shit the experts say, but when NASA scientist Bruce Bugbee said Cannabis soaks up Calcium like a sponge and struggles to uptake potassium, I'm gonna ignore that, because we all know led plants need more calcium. Someone told me so. It's even written in the broken English spider farmer manual. They've never grown a plant, but the plastic plants in their photos look nice?
 
bk78

bk78

Well-Known Member
GrodanLightfoot said:
Led growers (on the internet) be like:

1) Dark plants are awesome, needs more calnit, pk boosters bad! Borax bad!

2) It's so frosty, look at all the calcium carbonate in the trichs. Much frostier under my led smartphone flash than silica trichs.


3) I prefer smoking the lower, shaded buds. I also take photos of lower buds because my tops are too fucked up.


4) I love all the dumb shit the experts say, but when NASA scientist Bruce Bugbee said Cannabis soaks up Calcium like a sponge and struggles to uptake potassium, I'm gonna ignore that, because we all know led plants need more calcium. Someone told me so. It's even written in the broken English spider farmer manual. They've never grown a plant, but the plastic plants in their photos look nice?
Click to expand...

You know what’s even better? Some noob who joined 2 months ago criticizing everyone else’s grows and hasn’t even posted a pic of his mids yet.
 
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