Mukilteo drops toward the ferry and the Sound. Salt reaches the lower streets, and the hills above the terminal shed water down through yards that were cut into the slope. A flat inland detail does not survive on these lots. Lower lots take salt and sand. Upper lots take the same county clay, packed by years of mowing. We core the clay. We do not core a sandy bank that is already losing its top.
Snohomish County · ZIP 98275 · 2020 population 21,246
Salt wind and packed yards above the Sound
A beach-adjacent lawn that is mostly sand does not need plugs. It needs organic matter and a plant that can take wind. The yards a few streets up the hill are ordinary packed turf, often shaded, often mossy on the north side. Those get cores in fall, when the summer watering has stopped and the soil will close around seed.
We watch the grade. A patio or a walk that pitches water across the lawn will keep that strip soft no matter how many times we aerate it. The downspout gets moved, or the aeration is a waste.
The ground in Mukilteo
Hillside runoff is the job. A patio with a view is also a patio that can send water at the house if the base and the pitch are wrong. We build the drain before the pavers, and we hold the bank with a wall that has rock or drain tile behind it, not a decorative stack sitting on the sod.
Salt-tolerant natives belong on the exposed edges. Pressure washing is how you get the marine film off a walk and a railing; it comes back, so we treat it as upkeep. Lawns on the upper, slightly flatter streets behave more like the rest of the county — clay, moss, shade from big trees — and we maintain them that way. The waterfront lots are a different trade: erosion, wind, and a view you do not want to block with a hedge.
How we do the work
We pull cores, we do not poke holes. A spike aerator squeezes the soil tighter around each puncture, which is the opposite of what a Western Washington lawn needs. Cores are about three inches, left on the grass to break apart in the rain. The visit is timed for soil that is moist enough to take the tine and dry enough that the machine does not leave ruts.
If the thatch is thicker than a finger, aerating through it only decorates the moss. Those lawns get dethatched first. Lime is a separate decision. A lot of local soil is sour, and we spread lime when the lawn shows it, not because a calendar said March.
What we look at first
- Thatch depth before we core
- Whether the ground ruts under foot
- Shade from trees that will keep the lawn thin no matter how often we aerate
- Downspouts dumping onto the same corner every winter
Seed in the holes
Aeration without seed is enough when the lawn is thick and you are only relieving compaction. When you can see soil between the plants, we put seed in the openings the same day. Seed on an unaerated moss mat is bird food.
When we show up
The useful months are April into early June, and again in September. Midsummer cores on a dry lawn shatter and the holes collapse. January cores on saturated ground are ruts. We would rather wait a week than leave you with tracks.
What we leave behind
Plugs on the grass for a few days, then they fall apart. You can mow when they crumble. Watering is only needed if we seeded and the week turned dry, which is rare here. Stay off the soft spots until the footprints disappear.
More from this crew
- Lawn aeration across Snohomish County
- Lawn dethatching in Mukilteo
- Lawn seeding in Mukilteo
- Lawn fertilization in Mukilteo
- Lawn mowing in Mukilteo
- Lawn aeration in Everett
- Lawn aeration in Edmonds
- Lawn aeration in Mill Creek
Sources for the climate and the water
- USDA plant hardiness map for choosing plants that can take a Snohomish County winter.
- EPA WaterSense on watering less once a lawn or a new planting is established.
- EPA Soak Up the Rain on keeping roof and yard water from becoming someone else’s problem.
