Cal/mag an LED problem?

[exile19]

Is cal/mag a problem with LEDs? Heard about it is it true?

 

[SteveI]

I am using LEDs and have been having a cal/mag problem with the latest grow. I think it is a soil problem but I have been reading a lot about that recently. Need to keep an eye on that. LEDs are new and it could be a bit funky on the plant chemistry to have intense light in very specific wavelengths, something that would never occur naturally.

 

[gonnagro]

Yes, cal/mag and iron, but even with increased doses you'll still see some, (maybe a lot of), leaf crisping.

 

[exile19]

Is it going to stunt if I don't get nutes?

 

[Fuzzy Duck]

Is cal/mag a problem with LEDs? Heard about it is it true?

Unlikely.....

I would suggest on checking your water supply !

Normally cal/mag problems are associated with RO, soft, rain water use etc, etc if so a cal/mag supplement should be used

 

[chongho]

I am using LED in combination with HPS and I try to figure out why the young leaves suddenly start to droop.
Does a cal/mag problem results in drooping leaves ?

 

[Kalimaki420]

Can be.
Most of my plants need cal-mag with LED.
Comes down to strain and your water but many noticed that LED need some more.
Have no experience with HPS but most of my strains get cal-mag deficit after week 3 of bloom without.

 

[rhetorrikz]

I was having trouble with droopy sugar leaves on one strain ,, looked alot like above. and it turned out she was hungry , after adding more p k bloom boost all straightened out in a week or so
In saying that i do use a cal mag supplement, all my feeds start with about 150 ppm cal mag then add nutes on top of that. In coco

 

[Iguana Man]

If you go to Amazon and check the Mars Hydro 300 LED, the illustration depicting light hanging distances specifically says "more cal mag than usual". Granted that's only one manufacturer, but I too have read the need for more cal/mag after researching it.

That said, my second grow in HF soil @ 3 weeks started showing signs of cal/mag deficiency. Since then, I've added some CaliMagic and epsom salts to her last watering and she's looking pretty damn good so IMHO, generally speaking I would say yes.