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The most convenient source of Potash, or potassium, is wood ashes. If you have a wood burning fireplace, you can add the ashes to your garden. Or, you can purchase a bag of potassium at a well stocked nursery - one that carries organic fertilizers. You can purchase greensand, compost, or kelp meal as sources of potassium. There's also an Organic Potash (called Palm Bunch Ash 0-0-30). Another approach is to find a fertilizer with a high level of potassium (the 3 numbers on the fertilizer package indicate the 3 major nutrients, nitrogen, phosphorous and potassium). Choose a fertilizer with a higher third number.
Reducing the acidity of the soil is the primary purpose for using lime in the garden. However, liming materials also provide nutrients for plant use. Calcium and magnesium are the two elements most commonly provided by lime. Gypsum is used where more calcium is needed without raising the pH. In heavy clay soils, the use of gypsum helps increase moisture circulation. Organic gardeners use natural sources of lime, such as limestone, dolomite, shell, and marl. The most readily available source of lime for a garden is dolomitic lime and you'll find that in the garden section of your local Home Depot. Best wishes with your garden! |
