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A Perlite Primer – The Big White Stuff

March 23, 2010 1:51 pm

Large, coarse perlite alone may not be the best aggregate for a peat-based growing medium. In general, a mix of different sizes is desirable to provide uniformly distributed air spaces and to avoid the negative aspects of the ‘sand & rocks effect’ or in this case the ‘peat and rocks effect.’ How do sand and rocks relate to a growing medium? You’ve probably seen… View Article

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The Truth About Soluble Salts

March 23, 2010 1:41 pm

On a greenhouse visit some time ago, I asked a new grower, “What fertilizer rate are you using?”  To my surprise he replied, “I don‘t know.” I left the greenhouse fairly concerned, but after some contemplation decided that perhaps I shouldn’t be. Why? Because the fertilizer rate a grower provides to a crop is only one component affecting the crop‘s nutritional status. Factors such… View Article

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