WSU Extension programs and employment are available to all without discrimination. Evidence of noncompliance may be reported through your local Extension office.
Lawn and Turf: Moss
categories: Lawn and Turf Lawn and Turf Diseases
revision date: 2024-06-05 10:44
Photo by: G. Stahnke
Biology
Mosses are small, simple, non-flowering plants. They are typically low-growing and somewhat yellowish-green in color. They grow vigorously in the cool, moist weather of fall, winter, and spring, when lawn grasses are less able to compete. Moss in lawns generally results from low soil fertility, high soil acidity, heavy shade, improper watering practices, diseased grass, poorly drained soil, compacted soil, or any combination of these. Permanent moss control depends on eliminating conditions which favor moss growth.
Management Options
Use Integrated Pest Management (IPM) for successful plant problem management.
Non-chemical Management
Select non-chemical management options as your first choice!
- Maintain a vigorous, healthy lawn to prevent moss infestation.
- Provide proper fertilization and irrigation.
- Provide good soil drainage.
- Power or hand raking to remove moss will aid in control.
- Reduce shady conditions by pruning trees and shrubs.
- A soil test may be necessary to aid in correcting soil fertility or acidity. Your county extension agent or WSU Master Gardeners can recommend soil testing laboratories in your area.
Chemical Management
IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.
- Apply once the moss is growing most actively.
- Follow label instructions.
Approved Pesticides
Listed below are examples of pesticides that are legal in Washington. Always read and follow all label directions.
Additional Image
Photo by: G. Stahnke
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.