This video shows pepper plants in early flowering stage that are showing signs of Calcium deficiencies. The plants are growing in a simple ebb&flow setup using a mix of coco coir and grow stones. The combination of the high CEC of the coco coir and the low content of Calcium in our RO water caused our plants to become deficient in Calcium. This was corrected by boosting our Calcium ppm up to 300 by using Cal-Mag from Botanicare.

Calcium Deficiency Symptoms in Hydroponic Peppers

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6 Comments

  • CultureCrossbreed
    Reply

    By the way, 50/50 coco/perlite over here. Coco also gives off potassium so it's not truly inert, but you probably know that already. But, it's something to take into account.

  • CultureCrossbreed
    Reply

    Here's what I know: those plants are nitrogen toxified as BALLS. That is not the right shade of green, dude.

    Here's what I'm pretty sure about: more light intensity forces higher calcium/magnesium uptake by the plants. 300 PPM might be short if you're under a powerful light. I used 2x the recommended HEAVY dosage for General Hydroponics calmag, and my plants still seem wanting under a 720 Chrome. But, the root zone's been wet too long and now I gotta wait for it to dry to try more fixes.

  • pabbananna
    Reply

    yes, botanicare "one part" nutrients are hybrid organic. The calcium isn't necessarily immediately available though 

  • HydroParadigm
    Reply

    therefore upon settling the calcium will settle to the bottom and sulfur will float to the top (or the other way around). So this prevents the calcium and sulfur from being in contact with each other long enough to react. That is why you have to heavily shake all one part nutrients, otherwise you will just be pouring off the top layer!

  • HydroParadigm
    Reply

    Actually Botanicare has a one part CNS17 that has a good amount of calcium in it. The key to their success is the fact that they use what they call a "one part slurry". The main reason you can't combine two part nutrients is the affinity for calcium and sulfur to combine and form calcium sulfide and precipitate out of solution. The "slurry" has the ability to separate the liquid in two layers (think oil and water) the calcium or sulfur (not sure which one) is attached to the oil substance…

  • pabbananna
    Reply

    This can be prevented with a good 2 part formula – as long as the two parts never meet until diluted. Although my brand of hydro nutes assumes a certain ppm of calcium though so it is best to actually compute the totals ahead of time. One part nutes = impossible to have calcium. its just chemistry.

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