If you’re out shopping for fertilizer, you’ll run across a labelling method that needs to be understood in order to buy the appropriate nutrients for your yard. The first number stands for the percentage of nitrogen in the mix. The second number is for phosphorous, and the third number is potassium. These are the three primary macronutrients of fertilizer.
Potassium is the 19th element on the periodic chart, and it is represented by the letter K. It is typically mined, and the “potash” is the name given to the minerals that contain the potassium.
Potassium helps in the function of the stomata of a plant, which affects its respiration and carbon dioxide use. It also helps in water absorption and can increase drought resistance. It also affects protein generation and growth enzymes. The only thing more important than potassium for plant growth is nitrogen.
Because of the uses of potassium, a lawn that is potassium poor may have yellow edges of blades, more weeds, or look burned on the tips. Increased soil acidity may be a risk factor for potassium deficiency. Also, soils rich in sand will wash away nutrients like potassium.
Fertilizing with potassium is especially important in the fall because it strengthens the roots of the grass, which makes it hold on to nutrients and protect roots from frost. It is basically like preparing it for hibernation, and potassium is the food that will keep it through the winter.
If you suspect that you may be needing some potassium in your lawn before winter, the best thing to do is to get a soil test. Your local extension office can do it, but you’ll need to get sample bags and takes samples from multiple areas of the lawn. The test results will tell you about any macronutrients and micronutrients that your yard may need, and it will advise you about what type of fertilizer to get. With a soil test, there is no guesswork. Sure, you can go down and buy a simple 10-10-10 soil mixture, and it will probably work. However, it may harm your yard if that’s not what it needs. Take out the guesswork with a soil test.
If you want a yard that is going to survive the winter strong, then you need to make sure it gets enough potassium. This is an essential macronutrient to lawn growth.
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