Is Compost Peat Moss or Manure Best for Grass?

Fertilization and water yield healthy turf.

Peat Moss Compost

Peat moss is generally mixed with other composted materials and used as a top dressing on lawns. Mature peat moss compost is called peat humus, a fairly high-end product. Owners cut the grass short and apply 1/4-inch of compost uniformly across the lawn. Springtime is the optimum season for topdressing lawns. During growing season the grass will grow through the topdressing.

Manure As Topdressing

Manure is applied in much the same way as peat moss compost. The two can even be mixed and applied together. Be aware, however, that manure must be aged before application as a top-dressing. Applying fresh manure will burn the grass. Steer manure should not be used, but aged horse manure and dairy manure will yield healthy grass.

Bottom Line

Peat moss compost is generally more expensive than manure and cannot be applied alone. Highly absorbent peat moss will rob a lawn of needed moisture and once dry peat moss will blow away. Manure is generally less expensive, allows air and water to circulate through turf and once set manure stays put.

References

• Cornell Gardening Resources: Using Organic Matter In The Garden (See Peat Moss Section)
• Grounds Maintenance Magazine For Golf And Green Industry Professionals: Top Dressing Gaining Favor With LCOs