Lawn care in Tualatin, built around Tualatin's ground.

Tualatin's newer neighborhoods sit on relatively low, flat ground near the river, which means the water table and drainage come up more here than in the hillier parts of the metro. After a wet stretch, low spots on a Tualatin lot can hold water longer than a comparable lawn up on higher ground, which is exactly the condition moss and shallow-rooted weeds take advantage of.

Because much of Tualatin's residential growth is newer, we also see the same builder-grade-sod-over-compacted-subsoil pattern common in Hillsboro — a lawn that looked fine at move-in and has thinned steadily since. Aeration paired with attention to drainage tends to be the higher-value service here compared to a straightforward mow-and-feed routine.