Grow Mediums How much calmag do you put in with tap water for coco?

[the123321]

I am using gh calmag with tap water for 2 auto plants in coco in the 3 gallon pots on day 36 that are in flowering now. I have been doing around 2.5 ml/gallon of calmag with the water but I only water 1 time per day and the plants look like they have calmag deficiency. I do not water to runoff and I only put calmag with silicon in the water. I have dry amendments in the coco. If you only water the coco 1 time per day how much calmag would you put in with the tap water on there?

 

[oldnewbdude]

I use .5ml/l Sensi calmag xtra which works out to right under 2ml/gallon. But I'm feeding hydro style nutrients so I dunno if it's relevant.

 

[Proph]

Signs of a deficiency DOES NOT automatically mean ADD MORE! I can't stress this enough. Tap water has calcium in it.. No need to add more. You need to read up on calcium lock out. If you keep adding cal-mag, it will just keep getting worse at a faster rate..

 

[Zombie_eyez]

I use sensi cal/mag extra, I use 2.5 ml per gallon of tap for coco. I have had certain strains that needed more, but my usual is 2.5ml every feeding and go from there.

 

[Tommy Bahama]

Tap water has calcium in it.. No need to add more.

Not only that, but people forget there are two kinds of tap water - municipal (city) water and well water. Some well water can have a lot of calcium in it!

 

[Zombie_eyez]

This is true about tap water containing calcium, but not only does the plant use calmag, but the coco coir itself requires calmag. If we cant give the coco coir adequate doses of calmag, then your plant will not recieve what it needs. You can read up on Cation exchange in coco coir.

 

[Proph]

This is true about tap water containing calcium, but not only does the plant use calmag, but the coco coir itself requires calmag. If we cant give the coco coir adequate doses of calmag, then your plant will not recieve what it needs. You can read up on Cation exchange in coco coir.

I've studied cec and unfortunately, that's not how it works or what it means.. Coco doesn't "require" calcium. That's just false. Coco has an excellent cec and is naturally high in potassium. Non buffered coco cation sites will exchange nutrients with other nutrients easily, releasing an excess of potassium, which can lock out magnesium. Store bought coco is pre buffered with calcium because it's a double positive ion and will bond more securely with available/open cation sites, preventing the release excess of potassium and sodium. Most store bought/bagged coco is pre buffered with calcium and no more calcium is "required".. If you keep adding calcium to pre buffered coco, too many of the cation sites will contain calcium (which is well bonded) and the nutrient exchange will be completely off, or not happen at all, causing a lock out. This is why you see so much calcium lock out in coco. Even if it was required, calcium is one of the most common secondary nutrients, and is found in almost every type of other nutrient. Calcium is not needed to the point that you need a bottle of it, or add it regularly. Plants don't need much calcium at all.

 

[Raggedy Man]

My plants in flower almost always look like they have a calcium deficiency, I fight with it every grow. I've tried more calcium, less calcium, change the reservoir more often, pray and curse but no thing has helped. They always look like crap but always pull through with heavy beautiful colas.

 

[AutoWonders]

Signs of a deficiency DOES NOT automatically mean ADD MORE! I can't stress this enough. Tap water has calcium in it.. No need to add more. You need to read up on calcium lock out. If you keep adding cal-mag, it will just keep getting worse at a faster rate..

I have this problem with one plant because I wasn't paying close enough attention and over did it.

 

[andreas]

Water until run off , the salts will be building up :smoking: