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Converting Cool & Warm Season Lawns To Zoysia
Tips and instructions on how to convert an existing grass lawn
to a Zenith zoysia grass lawn using seeds. These instructions apply to establishment of zoysia grass in warm season and cool season grasses. Please read the warnings about using
herbicides with zoysia grass.
Seeding zoysia grass into existing lawns without first
completely eradicating the existing grass is not recommended as it is hard for the
smaller and slower growing Zoysia seedlings to survive competition
from your existing grass. IF you do NOT want to kill your existing lawn.. then you should consider planting
zoysia grass plugs and NOT seeds. Planting zoysia grass plugs will take longer to covert
to a complete zoysia lawn, but eventually the zoysia grass will overtake existing grass.
Tilling the soil multiple times is the best planting method for converting or planting new lawns -- see our informational site
http://www.grassing.com for information on site preparation and the seeding of grass.
Excellent alternatives to chemical lawn removal can be found here:
seed zoysia grass if a pre-emerge herbicide has been applied
within the previous 60 days
Not Over Water
fertility as suggested once turf cover is accomplished
Do not use herbicides until after about 12 weeks of growth has occurred.
If you choose to apply a glysophate such as Roundup be sure and follow the label instructions to avoid problems with your soil and pollution of ground waters. There has been some
controversy concerning the use of glysophate herbicides and other herbicides. It has been found that besides the obvious dangers of using chemicals, that these chemicals will cause "Super Weeds" --
weeds that become resistant to chemical eradication.
Note that an existing warm season grass may
be harder to kill with a glysophate such as Roundup and you
may end up with a mixed lawn if the lawn is not totally eradicated
through multiple treatments and patience!
Planting Zoysia Grass After Existing Lawn is Eradicated
Aerate to bring soil to the surface.
A hollow tine aerator is best (core aerator), but if not
available a spike aerator will suffice. Vertical mowers can be
used to help make little slits in the soil that are good for seeds
making proper soil contact.
Apply lime and fertilizer as needed to
adjust pH to 6.0-7.5 and lime as needed. Obtain a soil test to
Plant at 45 to 90 lbs per acre (1-2 lbs
per 1000 sq. ft. - 50 to 100 kg/H).
Using a drop or broadcast spreader,
spread 1/2 of your seed one direction and 1/2 in another to provide
good coverage. (First broadcast East-West, then North-South).
A slit seeder can be used for more precise planting. These can
be rented from some rental companies.
Roll after seeding if possible to
smooth area and insure good seed/soil contact.
Do NOT cover seeds more than 1/4 inch with
soil. Light is a key factor in germination and ideal
planting depth is 1/8 inch. The seeds will NOT germinate
broadcast on top of the soil.
Irrigate to keep soil moist (2 to 3
times daily for the first 14 to 21 days or until seedlings are
After seedlings have emerged, irrigate
to keep good moisture in the soil to a depth of 1 inch. DO NOT
OVER WATER! Too much water can cause seedling diseases and
kill your new grass.
Four (4), Eight (8) & twelve (12) weeks after planting
apply 400 lbs per acre (about 9 lbs per 1000 sq. ft) of a 10-10-10
or 8-8-8 fertilizer.
Avoid application of fertilizers high in
nitrogen in the late fall. For established turf (2 years and
older), apply the equivalent of 1 pound of nitrogen every 2 to 4
growing months using a balanced fertilizer. You should
determine the correct fertilizer based on a soil test. Contact
agent for help on this.
MOWING ZOYSIA GRASS
Mow lower areas if possible with a
reel mower. The grass can be mowed with a rotary mower at
higher levels. Begin mowing at 2 inches (50mm) height as soon
as grass or weeds can be cut. If using a rotary mower you may
want to continue cutting at 2 inch height. Reel mowers can be
gradually reduced to 3/4 to 1/2 inch over time.
Zoysia generally requires 10 fewer
mowings per growing season than the average Bermuda grass lawn.
Always use "SHARP" mower blades for
best results. Zoysia is a tough grass that requires a clean
cut to look good. Only sharp blades will give you this look.
MORE RECOMMENDED ZOYSIA
Read about Zenith
Read our suggestions on planting Zoysia
Read When to Plant seeds of Zoysia.
Need Zoysia plugs?
Buy at: www.lawnplug.com
Plug Info at www.lawnplugs.com
SEED USE NOTICE:
Please note that we ONLY recommend Zoysia seeds
for use in bare soil areas. Planting seeds into existing grasses
has a HIGH FAILURE rate. If planting into an existing lawn (grass and/or weeds) we recommend that you consider using Zoysia Grass plugs instead of seeds. -
Zoysia seeds also are difficult to achieve germination in low light /
shady areas. Use plugs in these areas for best results.
a beautiful tomorrow!®
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