its magnesium defHi. I have this slight yellow striping to my leaves it’s more prominent in older leaves. This is grown under a Gavita LED in coco. I’m used to hps to just trying to get used to LED. Any input would be much appreciated. Thanks
its magnesium def
I use a cal-mag with feeding for coco. Used the epsom salt as a foliage spray when I initially saw the issue. I use R/O so not sure as far as amounts of cal-mag, but it's kind of hard to use too much cal-mag unless you go crazy. You can use epson in water and nutes. Same amount (1 tsp per gal). It will only help with mag not calcium. Coco seems to need a regular cal-mag regiment. Don't know the specific specs of your nutes, but most require some additional cal-mag. Not sure if your tap water mag (11) is ppm or what specific mag ppm your water is already supplying vs whats required. If your final PH is 7.40 you need to lower it, as you may be blocking out essential nutes. With coco around 5.8-6.0 is good. 7.4 may be fine for mag but may block out other nutrients in hrdro. I'm a firm believer that varying the ph somewhat is a good thing. You can use ph down or silica to lower the ph. A simple search for ph nutrient absorption charts may help.
Thanks for your input, the ph is my tap I run my nutrient between 5.5 and 6.2 and try to vary it.
The calmag I get here has a lot of N from the calcium nitrate so I don’t want to end up with 2 much N in the solution. I feel like when using LED lights the magnesium should be higher. I guess my question is what should the ratio be? My feeling was something like 2:1 cal to mg but I’m not sure now? Also what ppms to shoot for? Is it for example HID = 100 Ca, 50 Mg
LED = 200 Ca, 100 Mg or am I over thinking it?
It very much looks like magnesium deficiency. I would recommend using cal mag 4ml per gallon. You can do 5ml per gallon 1st 2-3 waters. Then decrease it to 4 and eventually 3. After 5th week of flower u can stop using.Hi. I have this slight yellow striping to my leaves it’s more prominent in older leaves. This is grown under a Gavita LED in coco. I’m used to hps to just trying to get used to LED. Any input would be much appreciated. Thanks
You need to bring the Magnesium up to 70 -80 PPM for Led'sMagnesium...11