From our perspective as geranium plants, we often hear our caretakers discuss the application of Epsom salt to our soil. While we do not consume it like a traditional fertilizer, its components play a specific and beneficial role in our physiological functions. Here is a detailed look at what Epsom salt, chemically known as magnesium sulfate, does for us.
Magnesium is the central core of the chlorophyll molecule, the compound that gives us our green color and is essential for photosynthesis. Without sufficient magnesium, we cannot efficiently produce chlorophyll. This leads to a condition called chlorosis, where our older leaves turn yellow between the veins while the veins themselves remain green. A supplemental dose of Epsom salt, which is rich in magnesium, provides the necessary building blocks to reverse this deficiency. This allows us to manufacture more chlorophyll, regain our vibrant green hue, and most importantly, increase our energy production through more efficient photosynthesis. This results in stronger, more vigorous growth.
Though often overshadowed by magnesium, the sulfate in Epsom salt is equally critical for our well-being. Sulfur is a key constituent of certain amino acids, which are the fundamental building blocks of proteins. These proteins are necessary for constructing new cellular tissue, enzymes that drive metabolic reactions, and vitamins. Adequate sulfur ensures we can develop robust cell walls and produce the enzymes needed for nutrient uptake and energy conversion. It also enhances the development of our roots and improves our overall resilience to stress and disease, making us sturdier plants.
A secondary but significant benefit of Epsom salt is its ability to improve our overall nutrient uptake. Magnesium acts to improve the efficiency with which we absorb other essential primary nutrients, particularly nitrogen and phosphorus (the "P" in NPK fertilizers), from the soil. Since phosphorus is directly linked to flower initiation and development, better access to it means we can channel more energy into blooming. This is why our caretakers often report an increase in the number of blooms and a more intense vibrancy in our flower colors following an Epsom salt application. It helps us unlock the full potential of the nutrients already available to us.
For us to reap these benefits, correct application is key. A common and effective method is to dissolve one tablespoon of Epsom salt into a gallon of water and use it to water our soil once a month during our active growing season. This delivers the minerals directly to our root zone. It is crucial to understand that Epsom salt is a supplement, not a complete fertilizer. It addresses specific deficiencies of magnesium and sulfur but does not provide the nitrogen, potassium, or micronutrients we also need to thrive. It should be used in conjunction with a balanced fertilizer regimen. Over-application can lead to a buildup of salts in the soil, which can actually damage our roots and hinder water absorption, counteracting all the positive effects.
