Sultan sits on the Sultan River, on the way up the highway toward the trails and the passes. Yards step with the terrain. Water comes off the higher ground, crosses a lawn, and heads for the river or the ditch. On a slope, an aerator is how you rut a bank and start a rill. We core the ground that is actually flat enough to mow, and we leave the hillside alone.
Snohomish County · ZIP 98294 · 2020 population 5,458
Only the flat bench gets cored
Rocky, thin soil stops a tine early. Forcing the machine just chatters and rips the turf you have. We walk the bench of the lot, mark the part that drains instead of shedding, and core that. The bank needs a drain or a wall, not plugs.
The season is shorter up against the Cascades. We do not aerate into a freeze or into a week of mountain rain that will turn the cores into mud on a slope. If the lawn is mostly moss because the soil is two inches over rock, aeration is the wrong tool and we will tell you.
The ground in Sultan
The useful projects are the ones that make a sloped lot walkable: a gravel path that stays put, a rock wall where the bank is cutting, a drain at the top of the slope so the patio is not the creek. Forest edge is close. Alders and maples lean in, and after a wind the cleanup is limbs, not a few leaves on a patio.
Lawns exist on the benches. They need seed that can take shade at the tree line and a soil that is often thin. We do not promise a golf-course surface against the timber. Native mountain plants hold the cuts better than a bark bed that just slides downhill in January. Access for machines is usually fine along the highway side and tight once you are in the trees. We look at that before we promise a wall.
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
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.
What aeration will not fix
It will not move a downspout, kill a cedar’s shade, or drain a dish in the grade. If the lawn fails in the same circle every winter, we look at water and light before we sell you a third visit.
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.
More from this crew
- Lawn aeration across Snohomish County
- Lawn dethatching in Sultan
- Lawn seeding in Sultan
- Lawn fertilization in Sultan
- Lawn mowing in Sultan
- Lawn aeration in Monroe
- Lawn aeration in Gold Bar
- Lawn aeration in Index
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.
