Building a Healthy Lawnhenrico.us/pdfs/extension/Building a Healthy Lawn.pdf · Building a Healthy...
Transcript of Building a Healthy Lawnhenrico.us/pdfs/extension/Building a Healthy Lawn.pdf · Building a Healthy...
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Building a Healthy Lawn
Henrico County Extension Office
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Common Lawn Questions
Should I lime each year?What kind and how much fertilizer
should I buy?Should I bag my clippings?What can I do about all these
weeds? Why do parts of my lawn look bad?Are lawns bad for the environment?
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SMART Lawns Have Answers!
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2011 Lawn Care Seminars
7:00 - 8:30 p.m.SandstonTuesdays
TuckahoeWednesdays
Twin HickoryThursdays
Spring Weed Control
Mar 8 Mar 9Glen Allen
Library
Mar 10
Building a Healthy Lawn
Apr 12 Apr 13 Apr 14
Starting a New Lawn or
Renovating
Aug 9 Aug 10 Aug 11
Winterizing the Lawn
Sept 6 Sept 7 Sept 8
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Fall Lawn Care Field Day
Saturday, August 13, 20118:30 a.m. to 12:00 noon
Henrico County Extension Office8600 Dixon Powers Drive
Lawn Care AdviceLawn Care Products
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SMART Lawns . . .
Are beautiful because they’re healthyGreen up more quickly in the springMake the best use of two valuable
resources - time and moneyAre environmentally responsible Protect the Chesapeake Bay
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Can Result in Non-point Source
Pollution
Improper Use of Lawn Fertilizers and Pesticides. . .
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Healthy Lawns Protect Water Quality
A dense turf protects against soil erosion and nutrient runoff
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Nutrients are carried away with eroding
soil
Soil Sediment is Pollution
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SMART Lawns – Basic Steps
Know your SoilMeasure to save time and moneyAerate those rootsBe Right about FertilizerPractice Trouble-free maintenance
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Enroll in SMART Lawns!A Master Gardener Volunteer will:
–Collect a soil sample (Soil Test)–Measure your lawn areas (Measure)
You will receive:–SMART Lawns Guide–Customized lime and fertilizer plan
You provide the ART!–Aerate–Right Fertilizer–Trouble-free Maintenance
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To Enroll in SMART Lawns
Complete the SMART Lawns Enrollment Form and Pre-Survey
Attach a check for $20Provide a plat (survey) sheet of your
propertyMail to the Henrico Extension Office
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SMART Step One
Know Your Soil
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Soil Test Box and Form
Test every 2 to 3 years
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Accurate Soil TestingRequires a
representative sample Sample from 10+
areasSample to 4-6 inch
depthMix soil togetherPlace 1 cup of mix
in soil sample boxSend to Soil Testing
Lab
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Soil pH
A measure of soil alkalinity or acidityMany nutrients become unavailable
if pH is not correctMay need 100 pounds of lime per
1000 square feet to raise pH 1 point
Proper pH for Lawns 6.2 to 6.5
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SMART Step Two
Measure to Save Time and Money
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Measuring Lawn Areas
Measure smaller areas and add up for total lawn area
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SMART Step Three
Aerate Those Roots
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Aeration
Relieves soil compaction and/or thatch buildup
Allows oxygen, water and nutrients to reach the root system
Soil moisture important Fall for cool-season turf Core or hollow-tine aerators
recommended
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Hollow tines
Core Aeration
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SMART Step Four
Be Right About Fertilizer
Right FertilizerRight Time
Right Amount
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Which One is Right for Your Lawn?
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Information on a Fertilizer Label
16 - 4 - 8
Total Nitrogen………..…………..…..… 16 %5.6% WIN (Water Insoluble Nitrogen)
Available Phosphoric acid (P2O5)…… 4 %
Sulfate of Potash (K2O)...…………….. 8 %
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Maintenance Fertilizer
4 - 1 - 2 Ratio
No deficiencies
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4-1-2
For More K
Other Maintenance Examples
Starters for low P
Winterizers for low K
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Timing of Fertilizer Applications for Cool Season Grasses
September October November
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Advantages Of Fall Fertilization
Increased root growth Increased density
Decreased weed problems Decreased spring mowing
Increased drought toleranceDecreased summer disease
Improved fall to spring color
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COOL-SEASON TURF FERTILIZATION“SON” Program
lbs. Nitrogen perTime 1000 sq. ft.
September 1 to 15 1 October 1 to 15 1 November 15 to December 15 1 May 15 to June 15 0 to ½
TOTAL : 3 to 3 ½
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Using the percentage of nitrogen from the fertilizer analysis on the bag you
can accurately figure how much to apply by using the formula:
Desired lbs. of nitrogen per 1,000 sq. ft.
% nitrogen in fertilizer
x 100
= lbs. of fertilizer to apply per 1,000 sq. ft.
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Example
To apply 1 pound of nitrogen per 1,000 sq. ft. using a 16-4-8
fertilizer:
1 / 16 x 100 = 6.25 lbs.
6.25 lbs. of 16-4-8 is required per 1000 square feet to apply 1 pound of
nitrogen
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Drop vs. Rotary
Spreaders
Both must be calibrated!
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Follow Bag Instructions
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Trial and Error Calibration
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SMART Step Five
Practice Trouble-free Maintenance
Mowing
Watering
Weed Control
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Measuring Mower Height
Keep mower blades sharp
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One-Third Rule Mow frequently
enough so that no more than one-third of grass blade is removed each time
Research shows that when turf height is reduced by 50% or more, root growth is slowed or even stopped
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Don’t Bag the Clippings!
(Unless there’s a good reason)
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Watering “All or Nothing”
Avoid light, frequent irrigationsTurf needs 1 inch of water per weekCalibrate your irrigation systemWater early in the day, not lateUse the “screwdriver test”
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Calibrate Irrigation System Place shallow pans
in the irrigation pattern
How long does it take for 1 inch of water to collect?
This type of sprinkler may require 2-3 hours to deliver 1 inch
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When to Water?
Screwdriver (4 to 6 inch blade) can only be inserted halfway
Footprints remain in grass
Grass is smoky-blue color
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Broadleaf Weed Control for Homeowners
Most broadleaf weed problems–Combinations of 2,4-D, MCPP, MCPA,
dicambaHarder to control weeds
– triclopyr and/or carfentrazoneLots of weeds or perennial grasses
–glyphosate (non-selective)
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Broadleaf Weed Control
triclopyr
Read the Label
MCPA + triclopyr + dicamba
MCPA + triclopyr + dicamba
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Broadleaf Weed Control
carfentrazone+ 2,4-D + MCPP +
dicamba
2,4-D + MCPP + dicamba
MCPA + MCPP +
dicamba + carfentrazone
Read the Label
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A Simple Weed Management Plan
Mid-March–Apply a crabgrass preventer–Do not use product with fertilizer!–Repeat for season-long control
April and May–Broadleaf weed killer for summer weeds
October and November–Broadleaf weed killer for winter weeds–Consider weed and feed formulations
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CrabgrassApply a preventer
in mid-March
Annual BluegrassApply a preventer in
August if not overseeding
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Common Lespedeza
Spotted Spurge
Summer Annual Weeds
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Chickweed
HenbitWinter Annual
Weeds
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Common Bermudagrass
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Moss and Algae
Shade conditionsRestricted air movementPoor drainageChemical controls are short term