Do LED’s promote cal-mag issues

amneziaHaze

Well-Known Member
Why would you use a blend that you know is deficient? That just doesn't make any sense.
Each plant is diferent in its needs.and its a 3 part nute base with pure magnesium and pure calcium soo you can mix how you want.original recepie(on the box) is for tomatoes
 
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Prawn Connery

Well-Known Member
OK, that makes a bit more sense if you've not used it before and don't have a formula. Indicas tend to be more magnesium hogs and prefer a slightly higher pH than sativas, so nutrient requirements can also be strain dependent, but generally a good alround nutrient has most things covered.
 

egregory6

Member
I'm a bit late to the party but thought it might help someone else. There's some very knowledgeable people commenting before me.

I'm running a HLG 650R in a 3x3 tent and have been fighting calcium def problems for 3 years. I thought it was because my fertilizer had too much ammoniacal nitrogen and about 10 other things, but recently discovered that it was primarily not enough transpiration. I was running hot enough but I had to significantly lower humidity to solve the problem. Now I can run on full power and keep the plants green.

Now I keep the humidity under 60% measured within the canopy. I've been listening to Bruce Bugbee preach under 60% for a while but blindly followed the VPD charts until I heard him say it again this year and it finally sunk in.
 

1212ham

Well-Known Member
I'm a bit late to the party but thought it might help someone else. There's some very knowledgeable people commenting before me.

I'm running a HLG 650R in a 3x3 tent and have been fighting calcium def problems for 3 years. I thought it was because my fertilizer had too much ammoniacal nitrogen and about 10 other things, but recently discovered that it was primarily not enough transpiration. I was running hot enough but I had to significantly lower humidity to solve the problem. Now I can run on full power and keep the plants green.

Now I keep the humidity under 60% measured within the canopy. I've been listening to Bruce Bugbee preach under 60% for a while but blindly followed the VPD charts until I heard him say it again this year and it finally sunk in.
Growth stage? Air temp?
 

Hollatchaboy

Well-Known Member
I'm a bit late to the party but thought it might help someone else. There's some very knowledgeable people commenting before me.

I'm running a HLG 650R in a 3x3 tent and have been fighting calcium def problems for 3 years. I thought it was because my fertilizer had too much ammoniacal nitrogen and about 10 other things, but recently discovered that it was primarily not enough transpiration. I was running hot enough but I had to significantly lower humidity to solve the problem. Now I can run on full power and keep the plants green.

Now I keep the humidity under 60% measured within the canopy. I've been listening to Bruce Bugbee preach under 60% for a while but blindly followed the VPD charts until I heard him say it again this year and it finally sunk in.
A hlg650r in a 3x3? That's a lot of watts for that footprint. I thought my 480 watt in a 3x3 was a lil too much. Have you run it full blast?
 

MtRainDog

Well-Known Member
Yeah I run a total of 500 watts in a 3x5 (HLG350R + a 150 watt HLG DIY fixture). Which is ~33 watts/sq.ft.

650 watts in a 3x3 is ~72 watts/sq.ft.

You probably never need to run higher than 50% power in that setup
 
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