Garden & Greenhouse July 2017 Issue - Page 49

Using the “MSU” fertilizer approach of continu- ous feeding, says we should add about 1/8 teaspoon of Epsom Salt to every gallon of fertilizer we apply. Some however, prefer to do periodic supplementation – typically monthly – but to in order to keep a similar, overall addition level, we need to consider our feeding frequency. If you typically feed three out of four waterings, and water twice a week, then over the course of a month you feed about six times. To achieve the same amount of magnesium as if you had supplemented your fertilizer at every feeding, you would need 0.136 x 6 = 0.816 teaspoons – or to make life a bit easier – somewhere between 3/4- and 1 teaspoon per gallon, added to your fertilizer solution once a month. Others do quarterly additions, meaning they should be on the order of a tablespoon per gallon. But at that concentration, the amount of dissolved solids is getting up there, so rather than adding it to the fertil- izer and raising the TDS even more, it is probably bet- ter to add it to plain water only for application. GG Ray Barkalow has been growing orchids for over 45 years, and owns First Rays, which offers horticultural products to the hobby grower. He may be contacted at raybark@fi and you can visit his website at Let’s get growing naturally Visit www. To see the full line of Age Old products and find a dealer near you please visit: July 2017 49