Magnesium Hydroponic Effect

Notice how in figure 16 and 17 the leaves curl upwards like they're praying? They're praying for Mg! The tips may also twist.
This can be quickly resolved by watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.
If the starting water is above 200 ppm, that is pretty hard water, that will lock out mg with all of the calcium in the water. Either add a 1/4 teaspoon per gallon of epsom salts or lime (both will effectively reduce the lockout or invest into a reverse osmosis water filter.
Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.

Figure 16

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This can be quickly resolved by watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water).

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The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water).

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ilikeblazin said:

iv never tookin chem and never will.
where can i purchase this epsom salts?

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potroast said:

Yes, you can use Epsom Salts in your hydro reservoir. And you can mix it like it said, and spray your plants with it to give them a MG boost faster.

No, it's not the same as table salt, or Sodium Cloride. Epsom Salt is Magnesium Sulfate, completely different stuff.

Does it make you wish you listened that day in Chem class?

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