Zoysia Grass

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  • Fertilizer and Weed Prevention
  • Organic Fertilizer & Weed Prevention
  • Background
  • Zoysia Traits
  • Watering
  • Soils
  • Aeration
  • Mowing
  • Common Management Mistakes
  • Specialty Products

Zoysia Fertilizer and
Weed Prevention Program

January

Soil Test and Sol-u-cal (if necessary) - Soil testing available through W. P. Law, Inc.
Used to add Calcium to the soil and raises the pH to ensure necessary nutrients are available to your grass.

Feb. 15th - Mar. 15th

0-0-7 Barricade 0.38%   or   0-0-7 Dimension 0.13%
   (3# per 1000 sq. ft.)                          (3.3# per 1000 sq. ft.)
Prevents summer annual weeds such as crabgrass.

April
18-24-12 Starter Fertilizer
Provides phosphorus to promote root growth.

(4# per 1000 sq. ft.)

Bifenthrin Granular Insecticide
Broad spectrum insect control that lasts up to 3 months. Works great on fire ants.
(2.3# - 4.6# per 1000 sq. ft.)

Pillar G Fungicide (if necessary)
Systemic broad spectrum fungicide with two active ingredients for turf with a history of Large Patch.
(3# per 1000 sq. ft.)

May 15th - June 1st

19-0-6 Barricade 0.38% or 19-0-6 Confront3+Dimension 0.145%
   (3# per 1000 sq. ft.)                               (4# per 1000 sq. ft.)
Provides nitrogen and pre-emergent for green-up and extended weed control -OR- use 19-0-6 Confront3 + Dimension to control existing broadleaf weeds with the addition of Dimension for extended preventative weed control.

July
25-0-10 Fertilizer
Maintains steady even growth with balanced slow release nutrients.

(5# per 1000 sq. ft.)

Bifenthrin Granular Insecticide
Broad spectrum insect control that lasts up to 3 months. Works great on fire ants.
(2.3# - 4.6# per 1000 sq. ft.)

August
6-1-11 with 7% Iron
Produces green color without flushing top growth in late season.

(5# per 1000 sq. ft.)

Sept. 15th - Oct. 15th

0-0-7 Barricade 0.38%   or   0-0-7 Dimension 0.13%
   (3# per 1000 sq. ft.)                          (6.6# per 1000 sq. ft.)
Prevents winter annual weeds such as annual bluegrass (Poa annua).

Pillar G Fungicide (if necessary)
Systemic broad spectrum fungicide with two active ingredients for turf with a history of Large Patch.
(3# per 1000 sq. ft.)

October

Pillar G Fungicide (if necessary)
Systemic broad spectrum fungicide with two active ingredients for turf with a history of Large Patch.
(3# per 1000 sq. ft.)

 

 

Organic Fertilizer & Weed Prevention Program

January

Soil Test and Verdelawn (if necessary) - Soil testing available through W. P. Law, Inc.
Used to add Calcium to the soil and raises the pH to ensure necessary nutrients are available to your grass.

Feb. 15th - Mar. 15th

0-0-7 Barricade 0.38%   or   0-0-7 Dimension 0.13%
   (3# per 1000 sq. ft.)                          (3.3# per 1000 sq. ft.)
Prevents summer annual weeds such as crabgrass.

April
7-9-5
Holganix organic starter fertilizer
(5# per 1000 sq. ft.)

Holganix
Increases soil organic content and promotes a thick fibrous root system
(Spray at 7 oz. per 1000 sq. ft.)

May
0-0-7 Barricade 0.38%   or   0-0-7 Dimension 0.13%
   (3# per 1000 sq. ft.)                          (3.3# per 1000 sq. ft.)
Prevents summer annual weeds such as crabgrass.

10-3-2
Holganix organic fertilizer
(5# per 1000 sq. ft.)

Holganix
(Spray at 7 oz. per 1000 sq. ft.)

June
10-3-2
Holganix organic fertilizer
(5# per 1000 sq. ft.)

Holganix
(Spray at 7 oz. per 1000 sq. ft.)

July
10-3-2
Holganix organic fertilizer
(5# per 1000 sq. ft.)
August
6-1-11 with 7% Iron
(5# per 1000 sq. ft.)
Produces a green color without flushing top growth in late season
Sept. 15th - Oct. 15th
0-0-7 Barricade 0.38%   or   0-0-7 Dimension 0.13%
   (3# per 1000 sq. ft.)                          (6.6# per 1000 sq. ft.)
Prevents winter annual weeds such as annual blue grass.

Holganix
(Spray at 7 oz. per 1000 sq. ft.)



***Total Holganix organic spray treatment should equal 24-36 oz. per 1000 sq. ft. per season.

 

Background

Zoysia is a grass that originated in eastern Asia.  It has seen an increase in popularity in recent years with the development of newer varieties.  Appearance can vary as there are three different species of this grass.  Older varieties are notorious for heavy thatch accumulation and difficulty to mow.  Many of these problems have been addressed in the newer varieties.  Zoysia exhibits good shade and wear tolerance and is an excellent choice for a home lawn with varying levels of sunlight.

Zoysia has better cold tolerance than most of the warm season grasses and is drought tolerant. Sodding is the primary method of establishment since sprigs or seeding is extremely slow.  It is also slow to recover from injury.  Zoysia spreads from above and underground runners.  Zoysia is no different from most other warm season grasses in that it is also susceptible to patch diseases.

Zoysia Traits

  • Fertility - Medium
  • Drought Tolerance - Medium
  • Shade Tolerance - Good
  • Disease Problems - Patch Diseases, Rusts
  • Insect Problems - Low
  • Recuperation Rate - Poor
  • Density - Medium
  • Texture - Fine to Medium depending on cultivar
  • Wear Tolerance – Good

Watering

The watering requirement for your Zoysia lawn will vary greatly due to constantly changing weather conditions.  During the growing season, it may need anywhere from 0-1.5” of water per week. The professionals at W. P. Law, Inc. suggest using an irrigation controller with a weather station or soil moisture sensors to compensate for these changing conditions.

Studies have shown these types of controllers can save 20-50% on your water bill over traditional time based controllers.  Existing controllers can also be fitted with this water saving technology.

In addition to saving water and money, there is no need for continual adjustment.  The result is a better looking lawn with less effort.  Because these “smart controllers” only apply water when needed, they will usually pay for themselves in water savings within the first year.

Soils

A practical understanding of your soil is essential in managing your lawn. Soil pH is perhaps the most crucial element. Most turf grasses perform best when the soil pH falls between 6.3 and 7.0.

Aeration

Aeration has two purposes. The first is to simply loosen the soil. The second is to prune the roots. Core aeration is the recommended method and should be performed every 2 years on a typical home lawn during the growing season.  If your lawn receives heavy foot traffic, it is advisable to aerate every year.  Aeration should be performed during the growing season of the turf.

Mowing

Zoysiagrass performs best when mowed closely. We suggest that your lawn be mowed as close as 1 to 1 1/2 inches if possible.  The height of cut should be easily obtained so long as the lawn is smooth.  If there are severe irregularities in the grade, be careful not to scalp certain areas. Scalping a lawn could cause damage to the crown of the plant.

In order for Zoysia to look its best, it is mandatory that your lawn be mowed every 7 to 10 days.  This ensures that you avoid that “white” color of the lawn just after mowing.  A good rule of thumb is to NEVER remove more than 1/3 of the leaf blade during mowing.

Common Management Mistakes

  • Over Fertilization
  • Over-watering
  • Scalping

Over fertilization of Zoysia can lead to thatch problems on this grass.  Lime applications can increase activity levels of soil micro-organisms that will help break down thatch.  The shoots and roots that are shed during the growing process contribute to thatch build up.

A common misconception is that grass clippings are the primary source of thatch.  Grass clippings actually break down very quickly and will not create thatch problems.  Aerating with a core aerator is another useful management tool on Zoysia.  Many of the newer varieties can be cut with a rotary mower and show signs of being less prone to thatch build up.

Proper irrigation practices are essential on Zoysia to help prevent patch disease.  Over watering creates conditions that are conducive for disease spores to propagate and cause infection. Diseases are most active during the growing season.  Spring and Fall fungicide applications can help alleviate disease pressure.  Most patch diseases are a result of over watering.  We recommend using an irrigation controller with a weather station or soil moisture sensors to only apply water when needed.

Because of Zoysia’s tendency to produce thatch, over fertilizing should be avoided.  Slow release fertilizers offer a continual feed that will help reduce the amount of thatch in your lawn.  Adding Sol-u-cal can also help reduce thatch by stimulating soil micro-organisms that help break it down.

Mowing too low and too infrequently can lead to scalping.  Since Zoysia is slow to recover from injury, special attention should be paid when mowing.  If there is unevenness in the lawn, consider topdressing with sand to help smooth out low areas.

Specialty Products

  • Sol-u-Cal  - Used to adjust soil pH. When applied at a rate of 12 pounds per 1,000 sq. ft., Sol-u-Cal will raise the pH as much as one point in as little as 4-6 weeks.
  • Confront 3 Mini Granules - Excellent broadleaf weed control that can be used anytime of the year.
  • Bifenthrin - Broad spectrum insect control that lasts up to three months.  Works great on fire ants.
  • Eagle fungicide - Systemic broad spectrum disease control.
  • Aloft insecticide - Excellent grub control along with surface feeding insect control.