May 18, 2022

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Zoysia Grass: How to Overseed and Maintain It

Zoysia grass can be a excellent solution for your garden, but be sure to consider certain care measures to retain brown patches from forming.

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

Nevertheless, even with the most effective care, drought and pest problems can trigger grass blades to convert brown or go dormant. If substantial destruction takes place, and bare places variety, overseeding zoysia grass in the drop can aid restore the turf.

To that stop, here’s what can make zoysia mature patchy, how to overseed your zoysia lawn, and how to guarantee the best results.


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

What Can make Zoysia Grass Patchy?

In advance of overseeding zoysia grass, you are going to require to determine the root induce of the hurt. Drought is the usually main variable, but pests these as Chinch bugs, Searching billbugs, and fungal pathogens like Rhizoctonia solani could also be culprits.

Here’s a breakdown of how pests and pathogens have an effect on zoysia lawns:

Close view detail of a Chinch Bug (spilostethus pandurus)
Chinch bugs start off damaging grass from one particular aspect and broaden as populations raise. (Getty Photographs)

Chinch Bugs

Chinch bugs — the most prevalent pests of zoysia grass — spread swiftly to demolish significant garden places. These insects inflict problems during the scorching and dry summer months months, and it’s rough to distinguish their visits from drought outcomes. Still, their styles are predictable. Chinch bugs get started harming grass from 1 side and develop as populations boost. As a final result, injury is the most extreme together lawn boundaries, like sidewalks and driveways.

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

Hunting Billbugs

Looking billbugs are most energetic for the duration of the night time and early early morning. Their injury is additional widespread in mid- to late spring and early summer time, when billbug larvae bore into the zoysia’s reduced leaf stem and prosper. The turning point arrives when growing larvae feed on stolons in the early summer time, and grass demonstrates indications of yellow areas that eventually 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, will cause big brown patches in zoysia grass. (Getty Photographs)

Rhizoctonia Solani – Fungal Pathogen

The third most popular zoysia grass nuisance is Rhizoctonia solani, a soil-borne fungal pathogen. The significant-patch symptoms appear in the tumble and are most significant as zoysia grass progress slows owing to awesome temperature. This fungal pathogen can impact patches ranging from 6 inches to quite a few toes 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 — Straightforward Techniques

Overseeding zoysia grass is required to deal with bald lawn patches and produce a healthy garden. You should overseed lawns in the late spring or early tumble as temperatures are favorable for seed germination. If you overseed in the fall, distribute seeds at least 60 times just before the very first frost.

To get ready a zoysia lawn for overseeding, adhere to these techniques:

Acquire particles. The first stage of seedbed preparation is getting rid of debris, stones, rocks, pinecones, straws or any other ground deal with. Use a rake to obtain and clear away smaller parts of particles. If you’re seeding a bare location, remove any dead grass to expose the soil.

Mow. Slash the grass to about 1-inch tall, making certain proper seed-to-soil get hold of. When grass is large, seeds get stuck in the blades and may well not arrive at the soil. Preserving lower blade top is necessary for the prosperous overseeding of zoysia grass.

Aerate. This includes punching holes into the floor to loosen compacted soil. Satisfactory air circulation allows water to penetrate further to get to roots, and aerated soils can make it possible for for increased seed-to-soil contact.

Dethatch. Whereas aeration prepares the soil, dethatching prepares current turf. Thatch— consisting of dead grass below actively developing turf — accumulates above time. It boundaries h2o, fertilizer and grass seed from reaching the soil. Even if the lawns are mowed and aerated, really don’t forget about dethatching in advance of overseeding zoysia.

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

Zoysia demands far more nitrogen, small to no phosphorous and less potassium. Always keep in thoughts that the greatest Zoysia grass fertilizers will have higher nitrogen written content. 

Distribute seeds. Zoysia requires 2 lbs . of seed for each 1,000 sq. ft for optimal overseeding. Estimate the amount of money of seed necessary by dividing your garden spot by the proposed seeding fee. 

Ordinarily, a hand spreader or push spreader is the most effective instrument to distribute seed. Either one will assistance make sure that seeds are dispersed uniformly, so that revived lawn is equally included.


Man fertilizing lawn soil
Fertilizing your garden will make grass blades thicker and give denser development. (Getty Images)

So, you’ve overseeded your zoysia grass—now what? Right here are some pointers.

  • Overseeded zoysia lawns want great moisture to sprout seed. At first, water each day until eventually germination. The proposed price is 1 inch of water for each 7 days, which include rainfall.
  • Bear in mind: Overwatering appeals to pests to the lawn. Consider common measurements of water for optimum results.
  • Fertilization will help lawns prosper and indirectly helps to reduce the threat of insect problems. Proper fertilization helps make grass blades thick and provides denser advancement. When there is a thick layer of grass earlier mentioned the soil surface area, bugs have less accessibility to the nutrition discovered in the roots of the turf, and the garden is far more probably to increase insect-free.
  • Mow the overseeded garden when grass will get to a peak of 2 inches or much more. Underneath suitable circumstances, you will get started to see progress in 14 to 21 times.

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