[MittleiderMethodGardening] My Weekly Feed Gets Wet - What Can I DO?
A group member has written with the following question:
"Which of the weekly feed components is hygroscopic, absorbs water? Once in a while the freshly prepared weekly feed gets wet, leading to disappointment"
To which I have answered:
Please do not be too upset if your Weekly Feed gets wet and/or clumpy. It is still effective and usable, although admittedly not as pleasant to work with.
All of the natural mineral nutrients contain oxygen, and several contain hydrogen. When mixed together, the agitation, warm temperatures, and humidity in the air combine to make them want to get wet.
The most hygroscopic of them all is Epsom Salt - Magnesium Sulfate Heptahydrate (MgSO4.7H2O}, because it has 7 parts water for every one part magnesium.
Other forms of magnesium can be much less hygroscopic, such as Magnesium Sulfate Dihydrate (MgSO4.2H2O), however these other compounds are not readily available in small packages, and are therefore not easily sourced by the home gardener.
We recommend people add Perlite to their Weekly Feed mix at the rate of 1/2# per batch, in order to greatly mitigate that problem.
Jim Kennard.
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Posted by: jim@growfood.com
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