Sammamish sits on a plateau above Lake Sammamish, and most of it was built out as subdivisions in the last thirty years. Under a thin layer of topsoil is glacial till, a hardpan that water barely soaks into, and many lots back onto tall stands of Douglas fir. In deep shade the “weeds” are the plants that can live there. Clearing them without changing the light gives you bare mud, then the same plants.
King County · ZIP 98074
Weeds are filling in for grass
We will pull and treat invaders in a bed, and we will spot-treat a shady lawn that still has grass. We will not promise a weed-free turf under a solid canopy. Moss, violet, and buttercup are doing the job the grass quit.
Bed weeds under trees come out by the root, and the bed gets bark thick enough to matter. A dusting of bark is not weed control. Three inches, kept up, is.
The ground in Sammamish
The till is the reason so many yards here stay soggy in winter and dry out fast in summer. Water sits on top of the hardpan, so a new lawn or patio needs drainage planned in from the start. We put in French drains, grade the yard away from the house, and build patio bases deep enough that they do not heave.
Many neighborhoods have HOA rules for fences, front yards, and plant choices, and we work to those standards. Lots along the greenbelts get heavy shade and needle drop, so we use shade-tolerant planting and bark where grass has given up. Larger backyards here are a good fit for a full redesign: a paver patio, a low retaining wall to level the slope, and irrigation on a timer for the dry months.
How we do the work
Buttercup, dandelion, and clover in a lawn usually mean the grass is thin, the soil is wet or sour, or the mowing is too short. Spray on a lawn that is mostly weed is a brown yard. We thicken the grass and treat the weeds that are actually invaders, and we tell you when the lawn should be renovated instead.
In beds, the honest tools are a thick bark layer, a pulled root, and a edge that the field cannot cross. Pre-emergent has a place on gravel and on open soil. It is not a substitute for three inches of bark in a bed that was never mulched.
What we look at first
- Which weed it is, because buttercup and horsetail are not the same job
- How much of the lawn is still grass
- Wet spots that will regrow the weed no matter what we spray
- Beds versus turf, so we are not putting a lawn product in a shrub bed
Horsetail and buttercup
Both point at water. Horsetail especially will laugh at a single spray. We can suppress it and we will tell you it returns if the seep stays. Drainage is the actual fix. We do not sell a secret jug for it.
Spot treat, do not fog
A targeted application on the weeds you can name beats a broadcast that yellows the grass and still misses the roots in a wet spot. We would rather make a second short visit than burn a lawn to get the dandelions.
Bare spots need seed
A dead weed is a hole. In a lawn, that hole is the next weed unless grass fills it. We seed the opening when the product label and the season allow, or we come back and seed. Leaving dirt is not a finished visit.
More from this crew
- Lawn weed control across the region
- Lawn fertilization in Sammamish
- Lawn aeration in Sammamish
- Beauty bark in Sammamish
- Lawn mowing in Sammamish
- Lawn weed control in Mercer Island
Sources for the climate and the water
- USDA plant hardiness map for choosing plants that can take a King 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.
