How to Green Up Your Lawn with Iron Supplement - LawnPro

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How to Green Up Your Lawn with Iron Supplement

July 19, 2022


Do you envy your neighbor’s dark-green luscious grass? If you’ve noticed that your lawn’s color is a lighter green or even bordering on yellow, it’s possible that your soil has an iron deficiency. Properly adding iron to your lawn requires careful application and timing.  If your lawn has a soil deficiency and you want greener grass, you can take steps to remedy the problem, which we’ll outline here.

Why is Iron Important for Your Lawn?

Iron (Fe) for lawns is needed to support chlorophyll production and reduce moss growth.  The greener the grass, the more chlorophyll your lawn is producing. Pale green grass growing in your yard suggests that your lawn grasses aren’t making enough chlorophyll to produce that vibrant green grass you want to see growing in your landscape. Iron is particularly effective with fescue and bluegrass, helping these grasses stay deep green during the hot summer months without the increased growth caused by nitrogen fertilizers.

If your lawn is actually a yellowish-green, it could be suffering from a condition called iron chlorosis, which is a severe iron deficiency. If your lawn has acidic soil, it may struggle to absorb the iron that’s present in the soil. Be careful to determine your soil’s needs before you introduce a new active ingredient to it.

Types of Iron Supplements for Lawns

Iron for lawns comes in various forms. If your lawn lacks iron, you can rely on liquid iron supplements or other forms that we’ll discuss here.

  • Liquid Iron – Liquid iron supplements for lawns tend to be the most popular. With proper application or iron, your liquid iron supplement can support fast chlorophyll synthesis, turning your lawn green quite quickly.
  • Chelated Iron – Chelated iron is a liquid iron fertilizer that helps to amend iron-deficient soil. Chelated iron is a great option because it prevents the iron in your soil from turning to rust and causing rust stains on your grass, which can happen with exposure to water and air.
  • Granular Iron – If your grass and plants have an iron deficiency, you can add granular iron to your lawn to also correct the problem and enhance their growth. Granular iron supplements are easy to apply, but it’s also easy to miss spots. Granular iron takes somewhat longer to achieve those deep green results you’re looking for.

How often can you apply iron to your lawn?

While many property owners only spray liquid iron once per year, others may apply iron more often depending on the nutrient needs of their grass. Although you can apply iron more often than once per year, take care not to overdo it with iron supplements in your lawn or garden or you could throw off the pH balance of your soil. Adding iron in excess can leave your grass looking a winter gray rather than a vibrant green.

What to Watch Out For When Applying Iron

Remember to test your soil before you add iron. Other soil factors may lead to problems for various grasses, including yellowing. It’s important to be aware that iron can stain concrete, and therefore you should be careful to avoid walkways, athletic courts, and concrete driveways when applying iron to your lawn. Also avoid spraying your iron supplement on other garden plants, which might not need the nutrient. 

If you believe your lawn may have an iron deficiency, then give us a call today at 615-653-3871!