On Monday, March 20, 2017 at 7:00:42 PM UTC-7, dpb wrote:
On 03/20/2017 5:05 PM, wrote:

What is the best way to get rid of patches off moss on lawns?

While excess shade may be a contributing factor, many factors can cause
poor grass vitality and thus moss...excessively compacted soil, poor
drainage, too high or low soil pH, or simply poor soil in combination
with one or more of the above can lead to moss.

Poor lawn maintenance practices such as too-short mowing, over-watering
(combined with poor drainage/soil compaction/clay soils perhaps) can
also play a part. Lawn grasses need N; many soils are lacking or have
imbalanced pH such that it isn't available.

To get rid of the moss, find the underlying causes and fix them; else't
it'll simply come back.

The main cause was a long wet winter.