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Cornell Cooperative Extension

Suffolk County

  • Agriculture
  • Community Education
  • Gardening
  • Horticulture Labs
  • Marine
  • Energy
  • County Farm
  • 4-H
  • Peconic Dunes
  • Recursos en Español
Lawn

Lawn care basics.

white clover is great for pollinators

White clover is great for pollinators.

dandelion love them or hate them

Dandelion friend or foe.

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Lawn Care


General Lawn Care Lawn Pest Control


Healthy Lawns - Clean Water (web site on lawn care)

2025 Home Lawn Fungicide list

Healthy Lawns - Clean Water (brochure on lawn care)

Brown Patch on Turfgrass

Just Mow It: A Guide to Grass Recycling

Control of Broadleaf Lawn Weeds

Lawn Care Without Pesticides

Crabgrass Control

Lawn Care Easiest Steps

Dollar Spot on Turfgrass

The Homeowner's Lawn Care and Water Quality Almanac

Dreschlera Leafspot

Repetitive Overseeding - Increase Your Lawn Density

Grubs in your lawn

What to Do Following Salt Water Over Wash

Lawn Insects

Cornell Turfgrass 2015 Turf varieties

Moss Growth in Lawns

Necrotic Ringspot on Turfgrass

Yellow Nutsedge in Turfgrass

Pythium Blight and Root Rot on Turfgrass

Pythium Blight and Root Rot on Turfgrass

Red Thread on Turfgrass

Rust on Turfgrass

Summer Patch on Turfgrass

Stripe Smut on Turfgrass

Contact

Alice Raimondo
Horticulture Consultant
aw242@cornell.edu
631-727-4126

Last updated November 24, 2025

Horticulture Factsheets

  • General Gardening Information
  • Vegetable Gardening
  • Lawn Care
  • Ornamentals: Trees, Shrubs, Herbaceous
  • Growing Fruit
  • Indoor / Outdoor Insect Pests, Wildlide & Poisonous Plants
  • Christmas Trees
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Cornell Cooperative Extension
Suffolk County

Extension Education Center
423 Griffing Avenue, Suite 100
Riverhead, New York 11901-3071
TEL: 631-727-7850
suffolk@cornell.edu
Hours: 8:30am-4:30pm

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