Zoysia Grass: How to Overseed and Maintain It


Close up of Zoysia grass blades
Zoysia grass can be a excellent selection for your garden, but be sure to acquire specified treatment actions to hold brown patches from forming.

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

Even now, even with the very best treatment, drought and pest problems can trigger grass blades to flip brown or go dormant. If in depth hurt happens, and bare places type, overseeding zoysia grass in the tumble can support restore the turf.

To that finish, here’s what will make zoysia grow patchy, how to overseed your zoysia garden, and how to ensure the very best final results.

Brown patches in a zoysia grass lawn
Zoysia grass can turn out to be brown and patchy if specified pests or fungi are existing. (Getty Images Signature)

What Will make Zoysia Grass Patchy?

Prior to overseeding zoysia grass, you are going to will need to establish the root trigger of the injury. Drought is the often main component, but pests these kinds of as Chinch bugs, Looking 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 harmful grass from a person side and broaden as populations boost. (Getty Photos)

Chinch Bugs

Chinch bugs — the most popular pests of zoysia grass — distribute rapidly to damage significant garden spots. These bugs inflict injury through the incredibly hot and dry summer months, and it is difficult to distinguish their visits from drought outcomes. Still, their designs are predictable. Chinch bugs begin harming grass from one particular aspect and extend as populations boost. As a outcome, harm is the most critical 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)

Hunting Billbugs

Hunting billbugs are most energetic during the night time and early morning. Their injury is more prevalent in mid- to late spring and early summer, when billbug larvae bore into the zoysia’s lessen leaf stem and flourish. The turning issue comes when developing larvae feed on stolons in the early summer months, and grass demonstrates indicators 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, leads to large brown patches in zoysia grass. (Getty Images)

Rhizoctonia Solani – Fungal Pathogen

The third most typical zoysia grass nuisance is Rhizoctonia solani, a soil-borne fungal pathogen. The significant-patch signs and symptoms surface in the slide and are most intense as zoysia grass development slows due to great temperature. This fungal pathogen can have an effect on patches ranging from 6 inches to numerous ft 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 — Simple Ways

Overseeding zoysia grass is necessary to address bald lawn patches and generate a nutritious garden. You really should overseed lawns in the late spring or early slide as temperatures are favorable for seed germination. If you overseed in the slide, distribute seeds at the very least 60 days prior to the 1st frost.

To put together a zoysia garden for overseeding, follow these actions:

Accumulate particles. The very first action of seedbed preparing is eradicating particles, stones, rocks, pinecones, straws or any other floor go over. Use a rake to obtain and eliminate smaller sized parts of particles. If you’re seeding a bare spot, take away any useless grass to expose the soil.

Mow. Reduce the grass to about 1-inch tall, ensuring correct seed-to-soil make contact with. When grass is superior, seeds get caught in the blades and might not access the soil. Retaining lower blade peak is obligatory for the effective overseeding of zoysia grass.

Aerate. This requires punching holes into the ground to loosen compacted soil. Enough air circulation will allow h2o to penetrate deeper to reach roots, and aerated soils can allow for for greater seed-to-soil make contact with.

Dethatch. While aeration prepares the soil, dethatching prepares current turf. Thatch— consisting of lifeless grass beneath actively developing turf — accumulates above time. It restrictions h2o, fertilizer and grass seed from reaching the soil. Even if the lawns are mowed and aerated, don’t neglect dethatching before overseeding zoysia.

Fertilize. Ahead of distributing seeds, test the soil for nutrient deficiencies and implement a fertilizer primarily based on recommendations from a soil examination.

Zoysia demands far more nitrogen, very little to no phosphorous and a lot less potassium. Always continue to keep in intellect that the very best Zoysia grass fertilizers will have large nitrogen written content. 

Distribute seeds. Zoysia wants 2 lbs of seed per 1,000 square feet for ideal overseeding. Estimate the sum of seed wanted by dividing your garden space by the encouraged seeding charge. 

Normally, a hand spreader or thrust spreader is the very best tool to unfold seed. Either one particular will enable ensure that seeds are dispersed uniformly, so that revived garden is equally lined.

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

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

  • Overseeded zoysia lawns require great dampness to sprout seed. At first, drinking water each day until eventually germination. The suggested fee is 1 inch of water for every 7 days, together with rainfall.
  • Recall: Overwatering attracts pests to the lawn. Get common measurements of water for optimum effects.
  • Fertilization allows lawns prosper and indirectly can help to decrease the possibility of insect damage. Right fertilization will make grass blades thick and offers denser expansion. When there is a thick layer of grass higher than the soil surface area, bugs have a lot less obtain to the nutrients identified in the roots of the turf, and the garden is extra most likely to mature insect-totally free.
  • Mow the overseeded garden when grass gets to a peak of 2 inches or much more. Underneath great situations, you will start to see development in 14 to 21 times.

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