Zeolites-watch out
I would be careful with using zeolites. ZeoPro, in the processed form,
looks like a good product. However, as with all products, there may be some
bad side-effects that they don't publish. Zeolites in the natural form are
hydrated aluminosilicates and there around forty types. However, I would
assume the product ZeoPro uses a synthetic form of zeolites such as ZMS-5,
A, X, or Y. Zeolites are primarily mined from alkaline lake deposits or open
hydrologic systems, thus they are alkaline, so your soils p.h should be
monitored. The Addwest Minerals International Ltd. Co. of Wy. is the largest
of only a handful of companies that mine zeolites, and only 6% of their
production goes toward ag. use. Whereas, 87% goes toward adsorption products
i.e. pet litter, and waste water clean-up. The adsorption property is my
concern. Studies have shown that zeolites bind many minerals such as zinc,
chromium, and copper, making them unavailable to plants. They also bind
mineral pollutants which is good if using them as a filter, however in the
garden these pollutants tend to leach away naturally. The zeolites bind the
pollutants and eventually will develop very minor toxicity. Many soilless
mixtures have zeolites as a minor component because they bind mineral
particles allowing better air space. My guess is the purpose of zeolites in
ZeoPro is; as a binding agent for N, P, and K. allowing them to be slowly
released and as agent to allow better aeration in clay soils. Just beware of
the possible negative long term side effects.
My one cent worth,
Buck Meier
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