Turf, Moss

How do I remove moss from my lawn?

It is important to understand that mosses occur when

some underlying condition allows them to out compete

turf grasses and other plants. These conditions most

frequently are some combination of:

1) poorly drained, persistently wet soils.

2) acidic soil conditions.

3) medium to dense shade.

4) repeated scalping of turf on uneven terrain.

5) compacted soils.

If the problems that are limiting the turf or other plant

growth are not corrected, any moss elimination or control

efforts will be futile. First, identify which of the

above factors are likely contributing to the occurrence

of the moss. What is your soil pH? If you

do not know, then a soil test is required. You can learn

more about soil testing in Soil Testing for the Lawn

and Landscape Soil Sampling for the Home Gardener

(see References). A soil test is simple to perform and

very affordable for the amount of information you will

receive regarding lime and nutrient requirements.

If drainage is a problem, re-grade the area to eliminate the problem.

If lack of sunlight is the issue, pruning

trees to remove lower limbs or thin the canopy fosters

much improvement of turf-grass growing conditions.

Any arborist would concede that tree pruning usually

promotes healthy trees, so pruning benefits both trees

and lawn.

If moss occurs in sunny spots, mower scalp may

be the culprit. Wide mower decks reduce time on

the mower but may contribute to scalping on uneven

slopes. Scalping severely weakens turf grass and allows

moss to thrive. Smooth the uneven places in the

lawn by topdressing with soil, re-grade the area, or use

a smaller mower in uneven areas.

Compacted soils also give moss a competitive advantage.

Use a core aeration machine to alleviate compaction

and improve turf grass growing conditions. You

can rent such machines or hire a professional to aerate

the lawn for you. See reference for alternatives in moss suppression.