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Lawn grasses, like other plants, need nitrogen as an essential element in healthy growth. Nitrogen deficient lawns will be pale and patchy and exhibit poor or uneven growth.
Check your lawn for poor or patchy growth, pale colour and thin grass coverage.
Nitrogen is an essential element in the healthy growth of all plants including lawn grasses. We usually want a dense, green, lush lawn and nitrogen will encourage this.
The macro nutrients that plants need in relatively large quantities are nitrogen (N), sulphur (S), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg). But plants also need trace elements in small quantities for healthy growth. Trace elements include; iron (Fe), manganese (Mn), boron (B), copper (Cu), zinc (Zn) and molybdenum (Mo).