Other factors that contribute to algal growth are compacted soils, high fertility, and open, thin turf. Control of moss and algae does not involve the use of herbicides. Contact materials will at best only control moss and algae temporarily. The only permanent control of these pests is to correct the conditions that prevent or restrict turfgrass growth. The following cultural practices will stimulate healthy lawn grass growth and greatly inhibit the establishment and growth of mosses and algae.
Soil test the problem area as well as the rest of the turfgrass.
Separate soil samples should be collected from healthy turf and problem areas. Apply as needed the fertilizer and lime recommended to maintain good turfgrass growth throughout the lawn area. In moist places where there is poor drainage, contour or trench the area to move water away. In localized low lying areas, adding sand or soil will slightly change the elevation allowing the area to dry out. In larger areas that retain water, the installation of french drains or tile drains may be necessary.