The Stillaguamish sits on the north edge of town, and a lot of the yards along the valley floor are old river ground: fertile when it drains, and a slick gray clay when it does not. Winter rain piles up against houses that back toward the Centennial Trail and the river parks, and the lawn stays soft long after the street looks dry. Wet clay under a thin layer of bark grows weeds through it and turns the mulch to muck. Depth and a clean start are the whole job.
Snohomish County · ZIP 98223 · 2020 population 19,847
Bark on beds that stay damp
We strip the decomposed layer if it is already soil, then bark. In a valley bed that never dries, a thick mat can stay too wet against perennials, so we keep the depth honest and the crowns clear. The lawn edge gets cut so the mower is not flinging grass into the fresh bark.
Bark will not drain a bed. If the bed is a puddle, we fix that or we stop pretending mulch is the repair.
The ground in Arlington
Arlington is a valley town, not a hillside suburb. Lots near the farmland and the trail are often open to the west wind and sit on clay that holds water. After a wet week the soil smears under a boot and the moss moves into any thin spot in the grass. Houses closer to the river have a second problem: the ground is low, so a downspout that just dumps at the foundation has nowhere useful to send the water.
We plan work around that. Drainage goes in before we talk about a patio or a new lawn. Native plantings that actually belong on this floodplain — vine maple, salmonberry, and other understory that can take wet feet — do better than a plant list copied from a drier lot. Gravel paths and low rock work fit the rural edges of town without pretending the soil is something it is not.
How we do the work
Bark is a blanket, not a cleanup. We pull the weeds and the old matted layer that has turned into soil, edge the bed so the bark has a place to stop, and put down enough depth to block light. A sprinkle that still shows dirt is not a bark job. It is a way to pay for the same weeds in June.
We keep bark off the crowns of shrubs and off the trunks of trees. A volcano of mulch against the bark of a tree is how the trunk rots. Two to three inches across the soil, pulled back at the stems.
What we look at first
- Whether the old bark has composted into a weed bed
- The edge against the lawn
- Plants that are buried already
- How far the truck can get the load
Depth
About three inches after it settles, less against the stems, none against the trunk. One inch looks like a lot in the wheelbarrow and does nothing by July. We would rather do a smaller bed correctly.
How often
Top up every year or two, an inch or so, once the first depth is right. Starting over every spring means the first job was thin or the bed was never weeded. We would rather be on a light top-up.
Old fabric
Landscape fabric under bark is where weeds root in the dust on top, and where water sheets off. When we find it, we take it out if the bed is weedy. We do not sell a new layer of it.
More from this crew
- Beauty bark across Snohomish County
- Lawn weed control in Arlington
- Yard cleanup in Arlington
- Landscape design in Arlington
- Tree and shrub pruning in Arlington
- Beauty bark in Marysville
- Beauty bark in Granite Falls
- Beauty bark in Stanwood
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.
