Because of the many positive comments, questions, and requests generated from the first “Proper Centipede Lawn Care” post, I decided to expand it.
Healthy Centipede grass requires more micronutrients than macronutrients (nitrogen, phosphorus and potassium). Soil amendments should contain vitamins B-1, B-12, gibberellins, indoles, auxins as well as trace elements of boron, iron, zinc, cobalt, copper, manganese, molybdenum and sulfur. These nutrients should be chelated, meaning they are instantly available to the plant. They should be salt and chlorine free to be safe for the plant and soil.
Centipede Grass Deficiency Symptoms:
Nitrogen – Nitrogen deficiency is rarely a problem with Centipede Grass.
Potassium – Most grasses use potassium to build cells and tissue. Centipede grass however, is not like most grasses and handles potassium poorly.
Phosphorus – Potassium is harmful to the root systems of Centipede Grass.
Micronutrients and trace elements handle this job in Centipede grass.
Plants require smaller amounts of the secondary macronutrients-sulfur, calcium, and magnesium. Iron, manganese, zinc, copper, chlorine, boron, and molybdenum are still essential for growth but are required in even smaller amounts. They are often referred to as micronutrients or trace elements. Each of these macro- and micronutrients serves specific purposes for our grass.
Magnesium – Centipede foliage will appear yellowish green with red tinted edges. Even though it’s classified as a secondary macronutrient, magnesium is still critical for growth. Without magnesium, plants can’t use light to make food through photosynthesis! Plants also need magnesium to be able to take in their other essential nutrients and to make seeds.
Calcium – New leaves will be small and grass will be rust colored. As with sulfur, Centipede grasses also need calcium to make proteins. Calcium promotes new root growth and facilitates overall plant vigor.
Sulfur – Fully-grown leaves turn yellow. One of the secondary macronutrients, sulfur helps plants maintain their dark green color. Mainly, plants use sulfur to create essential proteins. In Centipede grasses, sulfur is essential for nitrogen-fixing nodules, and necessary in the formation of chlorophyll. Plants use sulfur in the processes of producing proteins, amino acids, enzymes and vitamins. Sulfur also helps the plant’s resistance to disease, aids in growth, and in seed formation.
Iron – The new grass will turn yellow. Iron makes for healthy, dark green growth. As with magnesium, iron is essential for photosynthesis. Iron is necessary for chlorophyll formation, and without it, plants wouldn’t be able to carry out essential cellular functions.
Manganese – The new grass turns yellow. In short, manganese makes things happen. Manganese is necessary for chlorophyll formation, and without it, grasses would not be able to carry out essential cellular functions.
Zinc – Grass leaves will appear shriveling, narrow bladed and smaller than usual. Plants use zinc in conjunction with other elements to carry out many natural processes including forming chlorophyll.
Boron – Yellowed grassing and immature growth. Centipede grasses don’t need much of it, but boron does facilitate nutrient uptake and it helps plants to grow new tissue.
Molybdenum – Fully grown and mature grass appears gray-green. Grasses need molybdenum to produce essential proteins.
Copper – Copper contributes too many natural processes including plant metabolism and reproduction.
Centipede Grass needs a low-nitrogen, fertilizer without phosphorus or potassium (9-0-0). Fertilizing with a nitrogen percentage of more than 9 more than twice a year will harm Centipede turf and promote lawn disease, weeds, and insect infestation. I use corn glutton meal (a fertilizer but also a pre-emergent broadleaf weed controller) in early spring and early fall. There is no weed and feed product on the market that will do more good than harm to Centipede grass. Centipede grass can be effectively greened up using lawn sulfur or iron. Sulfur and iron lowers soil pH but Centipede’s ideal pH is alkaline (4.5 to 5.5) so there is little danger of lowering the pH too much. (Also, most broadleaf weeds cannot survive in soils with a pH less than 7.0)
I have developed, with permission from my supplier, a program complete with properly pre-mixed liquid lawn amendments for the Do-It-Yourself crowd. If you can water your lawn with a garden hose, you can greatly improve the health of your Centipede lawn, the overall fertility of the soil under your lawn, increase drought tolerance, decrease weed proliferation, and get control of insect infestations. All products are 100% organic without chemical/synthetic additives that are save for you, your children, your pets, and the environment. The FDA and the EPA both consider the ingredients as food products.
Steve
Stout Services Lawn Care Plus
Centipede Lawn Care Program