Calcium for Alkaline Organic Garden Soils
All of the limes will raise the pH of the soil. So what do you do if you already have alkaline soil?
Calcium sulfate dihydrate (CaSO4·2H2O.), or Gypsum, can be used to lower the pH of alkaline soil and add calcium. If you are growing an acid loving crop, such as tomatoes or it's cousins, eggplants and peppers, and your soil is alkaline, this is what you should use.
Always follow label directions when using lime, because over-liming can be more detrimental to the plants than calcium deficiency. Before planting, it's always best to get a soil test done to determine exactly what you need to add to the soil to get the best pH. The proper pH can make nutrients like calcium more available to your garden plants, and help you have a healthier organic garden before you even start.
Growing an organic garden is a wonderful endeavor, and an excellent way to reduce your carbon footprint. Adding calcium to your soil at the right time and in the right amounts can help you prevent and treat calcium deficiency, and produce a healthier crop.
Source: The author has an AS in Horticulture and has been gardening and working in the horticultural industry for over 40 years. She has been writing about gardening since 2008.
Photo Credit: CCSA 2.5 licensed by Kluka at Wikimedia Commons