Zoysia Grass: How to Overseed and Maintain It

Kennith Bogan

Zoysia grass can be a great possibility for your lawn, but be absolutely sure to choose selected treatment measures to keep brown patches from forming.

Zoysia grass is a heat-year turf from Asia built of several species. This coarse grass— which thrives in central and southern states — is not shade-loving and prefers the sun.

Even now, even with the most effective care, drought and pest destruction can result in grass blades to turn brown or go dormant. If extensive hurt happens, and bare spots type, overseeding zoysia grass in the drop can assistance restore the turf.

To that conclude, here’s what would make zoysia mature patchy, how to overseed your zoysia garden, and how to assure the finest benefits.


Brown patches in a zoysia grass lawn
Zoysia grass can grow to be brown and patchy if specific pests or fungi are existing. (Getty Visuals Signature)

What Tends to make Zoysia Grass Patchy?

Before overseeding zoysia grass, you will require to determine the root lead to of the hurt. Drought is the typically major factor, but pests such as Chinch bugs, Searching billbugs, and fungal pathogens like Rhizoctonia solani could also be culprits.

Here’s a breakdown of how pests and pathogens influence zoysia lawns:

Close view detail of a Chinch Bug (spilostethus pandurus)
Chinch bugs commence damaging grass from a single facet and grow as populations enhance. (Getty Pictures)

Chinch Bugs

Chinch bugs — the most widespread pests of zoysia grass — unfold speedily to ruin big lawn locations. These bugs inflict destruction during the very hot and dry summer season months, and it is tough to distinguish their visits from drought results. Continue to, their patterns are predictable. Chinch bugs begin harming grass from 1 aspect and increase as populations enhance. As a result, problems is the most extreme together garden boundaries, like sidewalks and driveways.

Hunting billbug weevil feeding on a plant stem
Searching billbugs feed on plant stems and grass blades. (Getty Visuals)

Searching Billbugs

Looking billbugs are most active for the duration of the night and early morning. Their problems is more widespread in mid- to late spring and early summertime, when billbug larvae bore into the zoysia’s lessen leaf stem and prosper. The turning stage arrives when rising larvae feed on stolons in the early summer season, and grass reveals signs or symptoms of yellow areas that inevitably brown and die out.  

Green and yellow grass texture brown patch caused by the destruction of fungus Rhizoctonia Solani grass leaf change from green to dead brown in circle lawn texture background dead dry grass
Rhizoctonia solani, a soil-borne fungal pathogen, results in huge brown patches in zoysia grass. (Getty Visuals)

Rhizoctonia Solani – Fungal Pathogen

The third most typical zoysia grass nuisance is Rhizoctonia solani, a soil-borne fungal pathogen. The large-patch indicators appear in the drop and are most critical as zoysia grass advancement slows owing to great temperature. This fungal pathogen can have an affect on patches ranging from 6 inches to quite a few feet in diameter.


Close up of modern gas engine grass lawn aerator
Aerate your lawn so your seeds can penetrate further into the soil.

How to Overseed Zoysia Grass — Easy Actions

Overseeding zoysia grass is needed to address bald lawn patches and develop a wholesome lawn. You should overseed lawns in the late spring or early tumble as temperatures are favorable for seed germination. If you overseed in the slide, distribute seeds at the very least 60 days in advance of the 1st frost.

To prepare a zoysia lawn for overseeding, observe these ways:

Obtain particles. The 1st step of seedbed planning is eliminating debris, stones, rocks, pinecones, straws or any other ground address. Use a rake to collect and take out more compact parts of debris. If you are seeding a bare spot, get rid of any lifeless grass to expose the soil.

Mow. Minimize the grass to about 1-inch tall, making sure ideal seed-to-soil get hold of. When grass is high, seeds get stuck in the blades and may not arrive at the soil. Retaining low blade top is mandatory for the profitable overseeding of zoysia grass.

Aerate. This entails punching holes into the ground to loosen compacted soil. Ample air circulation enables water to penetrate further to arrive at roots, and aerated soils can enable for bigger seed-to-soil call.

Dethatch. Whilst aeration prepares the soil, dethatching prepares existing turf. Thatch— consisting of lifeless grass under actively escalating turf — accumulates around time. It restrictions drinking water, fertilizer and grass seed from reaching the soil. Even if the lawns are mowed and aerated, never forget dethatching ahead of overseeding zoysia.

Fertilize. Prior to distributing seeds, examine the soil for nutrient deficiencies and implement a fertilizer based mostly on suggestions from a soil exam.

Zoysia demands much more nitrogen, minor to no phosphorous and less potassium. Generally keep in mind that the best Zoysia grass fertilizers will have large nitrogen material. 

Distribute seeds. Zoysia requires 2 lbs . of seed per 1,000 sq. ft for best overseeding. Determine the sum of seed necessary by dividing your lawn spot by the encouraged seeding price. 

Ordinarily, a hand spreader or push spreader is the very best instrument to distribute seed. Either a single will assist make sure that seeds are dispersed uniformly, so that revived garden is similarly coated.


Man fertilizing lawn soil
Fertilizing your lawn will make grass blades thicker and give denser progress. (Getty Photos)

So, you have overseeded your zoysia grass—now what? Here are some tips.

  • Overseeded zoysia lawns will need very good dampness to sprout seed. Originally, h2o day by day until germination. The recommended fee is 1 inch of water for every week, which include rainfall.
  • Remember: Overwatering draws in pests to the lawn. Get normal measurements of water for exceptional results.
  • Fertilization helps lawns prosper and indirectly can help to cut down the hazard of insect problems. Correct fertilization can make grass blades thick and provides denser advancement. When there is a thick layer of grass previously mentioned the soil surface, bugs have significantly less obtain to the nutrients discovered in the roots of the turf, and the garden is a lot more likely to improve insect-absolutely free.
  • Mow the overseeded garden when grass will get to a top of 2 inches or extra. Below suitable problems, you will get started to see progress in 14 to 21 days.

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