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3/19/2018
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LawnsAlec KowalewskiTurfgrass Specialist Oregon State University [email protected]
• Primary Cultural Practices • Mowing • Fertilization• Irrigation
• Cultivation and inter-seeding
• Management of…• False dandelion • White clover
Lawns
Primary Cultural Practices1. Mowing2. Fertilizing 3. Irrigation
Primary Cultural Practices
Turfgrass
Primary Cultural Practices Primary Cultural Practices
Turfgrass
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Primary Cultural Practices
Turfgrass
Primary Cultural Practices
MOWING
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6”
4”
4.5”
3” 3”
2”1.5”
1”
Des
ired
Mow
ing
Hei
ght
Mow
ing
follo
win
g 1/
3 Ru
le
Mowing• The one-third rule
Mowing • The one-third rule
Mowing• The one-third rule
• Prevent scalping
• Scalping…• Causes a brown appearance• Stops growth and development• Depletes carbohydrates• Makes turf susceptible to environmental stress
Sunlight
4”
Sunlight
3”
Mowing • The one-third rule
• Prevent weed seed germination
Mowing
Sunlight Sunlight
4”
2”
• The one-third rule• Prevent weed seed germination
Mowing• Raise your mowing height
• Adhere to the one-third rule• Improve rooting
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Mowing• Raise your mowing height
• Prevent weed seed germination
Sunlight Sunlight
4”
2”
Mowing• Raise your mowing height
• Raising the height from 1.5” to 3.0”• Improved turfgrass quality • Reduced weed populations
• Crabgrass cover by up to 52% • Dandelion populations by up to 45%• White clover by up to 58%
Kentucky bluegrass, perennial ryegrass and fine fescue mixture
Mowing
35 days
• Increase your mowing frequency • Adhere to the one-third rule • Increase turfgrass density• Weed control
• Lambsquarter• Ragweed• Purslane• Garlic mustard
Mowing
42 days
• Increase your mowing frequency • Adhere to the one-third rule • Increase turfgrass density• Weed control
• Lambsquarter• Ragweed• Purslane• Garlic mustard
Mowing
49 days
• Increase your mowing frequency • Adhere to the one-third rule • Increase turfgrass density• Weed control
• Lambsquarter• Ragweed• Purslane• Garlic mustard
Mowing • Weeds that indicate your mowing height is to low…
• Annual bluegrass• Crabgrass • Dandelion
Crabgrass
Annual bluegrass
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MOWING
FERTILIZATION
Fertilization• Select a fertilizer designed for turfgrass