cal mag amount

osowhom

osowhom

Well-Known Member
my girls are in week 3 of flower and were having a deficiency problem i bought a quart of GH cal/mag it says 4ml per gallon would it hurt to double or triple that dose for the first feeding? has anyone had experience with this or should i tread lightly?
 
larrypizzimp93

larrypizzimp93

Well-Known Member
osowhom said:
my girls are in week 3 of flower and were having a deficiency problem i bought a quart of GH cal/mag it says 4ml per gallon would it hurt to double or triple that dose for the first feeding? has anyone had experience with this or should i tread lightly?
Click to expand...
stay at 4ml/gal and if they're still showing it go to 5ml. Also depends what medium you're growing in
 
Rurumo

Rurumo

Well-Known Member
Don't do that. Do you have pics of what you are seeing? Also, what sort of water are you using? RO or Tap, and if tap, look up a water quality report that has stuff like PH, Alkalinity, total hardness, etc...also, see if it has the calcium and magnesium levels on it too. If you are on city water, this report is available someplace online. Always start with the water first, then look at media/nutrients.
 
larrypizzimp93

larrypizzimp93

Well-Known Member
Rurumo said:
Don't do that. Do you have pics of what you are seeing? Also, what sort of water are you using? RO or Tap, and if tap, look up a water quality report that has stuff like PH, Alkalinity, total hardness, etc...also, see if it has the calcium and magnesium levels on it too. If you are on city water, this report is available someplace online. Always start with the water first, then look at media/nutrients.
Click to expand...
This too. If I use tap water I use 2ml
 
Arkos

Arkos

Well-Known Member
Ro water, coco, led grow here, if I feed my plants 0.3 ec calmag they start showing deficiencies, it has to be 0.4 ec of calmag in the Ro water or my plants are not happy at all.

Symptoms, red stems, yellowing leaves between veins, brown spots etc.

P.s. go with e.c./ppm to measure how much is in there before adding the base nutrients. Sorry if I'm stating the obvious
 
Arkos

Arkos

Well-Known Member
lusidghost said:
You're using cal mag with tap water? That seems a little extreme. If they need it they need it, but damn, hungry girls.
Click to expand...
His tab water could also contain low amounts of calcium and magnesium, my home country is like that, clean good water but low in those two minerals.
 
curious2garden

curious2garden

Well-Known Mod
Staff member
osowhom said:
my girls are in week 3 of flower and were having a deficiency problem i bought a quart of GH cal/mag it says 4ml per gallon would it hurt to double or triple that dose for the first feeding? has anyone had experience with this or should i tread lightly?
Click to expand...
Listen to Rurumo and get some pics under natural light.
 
twentyeight.threefive

twentyeight.threefive

Well-Known Member
osowhom said:
my girls are in week 3 of flower and were having a deficiency problem i bought a quart of GH cal/mag it says 4ml per gallon would it hurt to double or triple that dose for the first feeding? has anyone had experience with this or should i tread lightly?
Click to expand...
Do the instructions say to double or triple the amount for the first feeding? Why would you think that's ok?

More often than not plants don't need CalMag. Another internet bro-myth. Calcium and magnesium deficiencies are usually caused by overfeeding.
 
Last edited:
You must log in or register to reply here.
Top