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Zoysia Grass: Find out how to Overseed and Keep It


Close up of Zoysia grass blades
Zoysia grass is usually a nice choice on your garden, however remember to take sure care measures to maintain brown patches from forming.

Zoysia grass is a warm-season turf from Asia fabricated from a number of species. This coarse grass— which thrives in central and southern states — just isn’t shade-loving and prefers the solar.

Nonetheless, even with the very best care, drought and pest injury may cause grass blades to show brown or go dormant. If in depth injury happens, and naked spots kind, overseeding zoysia grass within the fall may also help restore the turf.

To that finish, right here’s what makes zoysia develop patchy, how one can overseed your zoysia garden, and the way to make sure the very best outcomes.


Brown patches in a zoysia grass lawn
Zoysia grass can develop into brown and patchy if sure pests or fungi are current. (Getty Photographs Signature)

What Makes Zoysia Grass Patchy?

Earlier than overseeding zoysia grass, you’ll must determine the foundation explanation for the injury. Drought is the usually main issue, however pests similar to Chinch bugs, Looking billbugs, and fungal pathogens like Rhizoctonia solani is also culprits.

Right 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 damaging grass from one aspect and develop as populations enhance. (Getty Photographs)

Chinch Bugs

Chinch bugs — the commonest pests of zoysia grass — unfold quickly to destroy main garden areas. These bugs inflict injury in the course of the sizzling and dry summer season months, and it’s powerful to differentiate their visits from drought results. Nonetheless, their patterns are predictable. Chinch bugs start damaging grass from one aspect and develop as populations enhance. Consequently, injury is essentially the most extreme alongside garden boundaries, like sidewalks and driveways.

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

Looking Billbugs

Looking billbugs are most lively in the course of the evening and early morning. Their injury is extra widespread in mid- to late spring and early summer season, when billbug larvae bore into the zoysia’s decrease leaf stem and flourish. The turning level comes when rising larvae feed on stolons within the early summer season, and grass reveals signs of yellow areas that finally 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, causes massive brown patches in zoysia grass. (Getty Photographs)

Rhizoctonia Solani – Fungal Pathogen

The third commonest zoysia grass nuisance is Rhizoctonia solani, a soil-borne fungal pathogen. The big-patch signs seem within the fall and are most extreme as zoysia grass development slows attributable to cool temperature. This fungal pathogen can have an effect on patches starting from 6 inches to many toes in diameter.


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

Find out how to Overseed Zoysia Grass — Straightforward Steps

Overseeding zoysia grass is important to cowl bald garden patches and create a wholesome garden. You must overseed lawns within the late spring or early fall as temperatures are favorable for seed germination. When you overseed within the fall, unfold seeds not less than 60 days earlier than the primary frost.

To arrange a zoysia garden for overseeding, comply with these steps:

Acquire particles. Step one of seedbed preparation is eradicating particles, stones, rocks, pinecones, straws or some other floor cowl. Use a rake to gather and take away smaller items of particles. When you’re seeding a naked spot, take away any lifeless grass to show the soil.

Mow. Reduce the grass to about 1-inch tall, making certain applicable seed-to-soil contact. When grass is excessive, seeds get caught within the blades and should not attain the soil. Sustaining low blade peak is necessary for the profitable overseeding of zoysia grass.

Aerate. This entails punching holes into the bottom to loosen compacted soil. Sufficient air circulation permits water to penetrate deeper to achieve roots, and aerated soils can enable for higher seed-to-soil contact.

Dethatch. Whereas aeration prepares the soil, dethatching prepares current turf. Thatch— consisting of lifeless grass underneath actively rising turf — accumulates over time. It limits water, fertilizer and grass seed from reaching the soil. Even when the lawns are mowed and aerated, don’t overlook dethatching earlier than overseeding zoysia.

Fertilize. Earlier than distributing seeds, examine the soil for nutrient deficiencies and apply a fertilizer based mostly on suggestions from a soil check.

Zoysia wants extra nitrogen, little to no phosphorous and fewer potassium. All the time understand that the finest Zoysia grass fertilizers could have excessive nitrogen content material. 

Distribute seeds. Zoysia wants 2 kilos of seed per 1,000 sq. toes for optimum overseeding. Calculate the quantity of seed wanted by dividing your garden space by the advisable seeding charge. 

Sometimes, a hand spreader or push spreader is the very best software to unfold seed. Both one will assist make sure that seeds are dispersed uniformly, in order that revived garden is equally coated.


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

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

  • Overseeded zoysia lawns want good moisture to sprout seed. Initially, water each day till germination. The advisable charge is 1 inch of water per week, together with rainfall.
  • Bear in mind: Overwatering attracts pests to the garden. Take common measurements of water for optimum outcomes.
  • Fertilization helps lawns thrive and not directly helps to cut back the danger of insect injury. Correct fertilization makes grass blades thick and offers denser development. When there’s a thick layer of grass above the soil floor, bugs have much less entry to the vitamins discovered within the roots of the turf, and the garden is extra more likely to develop insect-free.
  • Mow the overseeded garden when grass will get to a peak of two inches or extra. Underneath supreme circumstances, you’ll begin to see development in 14 to 21 days.

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