The short checklist
- Water kit: hose, timer, pressure regulator, filter, and a drip kit. Seven inches of annual rain is trivia, not a plan.
- Mulch + compost: a local source you can repeat. Bare July soil is how you grow dust and mites.
- Hand tools: trowel, bypass pruners, gloves, and something to stake with on day one.
- Cages / stakes / row cover: wind and late April surprises are not theoretical.
- Soil thermometer: peppers and basil wait for warm soil. Your optimism is not a sensor.
- One local brain: WSU Master Gardeners of Benton & Franklin Counties before a coastal WA blog.
Who to ask first (real doors)
Start with WSU Extension of Benton & Franklin Counties. The Kennewick office is at 7102 W. Okanogan Place, Suite 102. Main line: 509-735-3551. They are the land-grant front door, not a big-box help desk.
For “what is eating my zucchini,” use the Master Gardener program and their Ask a Master Gardener / plant clinic (in-person clinic is typically May–October; off-season they tell you to call the Kennewick office). Bring a sample in a sealed bag: leaf plus the underside, a photo of the whole plant, and a sentence about how you water. They do not test soil or water samples at that clinic.
If you are on canal or pressurized irrigation, your district is a resource, not just a bill. Kennewick Irrigation District (KID) publishes homeowner guidance at kid.org. Other basin districts (Columbia Irrigation District and neighbors) exist — use the name on your assessment, not a guessed URL.
Benton Conservation District is the local stewardship shop, including the water-wise Heritage Garden program. Useful when you want natives and less lawn around the vegetable beds, not as a substitute for drip on tomatoes.
Seed and starts that understand this climate
Packets written for “the Pacific Northwest” often mean west of the mountains. Look for heat-set tomatoes, long-day onions, and days-to-maturity that still finish before mid-October frost.
- Irish Eyes Garden Seeds (Ellensburg) — actual inland Washington farm, not a coastal catalog with a rain jacket.
- Territorial Seed Company (Cottage Grove, OR) — western Oregon, but they list heat and short-season types that behave here if you irrigate.
- Local spring plant sales: WSU Master Gardeners run an annual sale; watch the Benton-Franklin Extension calendar rather than a random Facebook clone.
- Big-box starts are fine if they are stocky and you harden them off. Leggy April tomatoes are a trap.
Top ways people mess this up
- Seattle cosplay research. Slug blogs and “just wait for rain” calendars. Wrong biome.
- No pressure regulator on drip. You blow fittings and call the garden cursed.
- Skipping a soil test for five years while adding random lime to already alkaline dirt.
- Calling a clinic without a sample. “My plant looks sad” is not a taxon.
Field kit
- Soil thermometer + cheap min-max thermometer for the actual bed, not the airport.
- pH / complete soil test every 2–4 years from a PNW agricultural lab (see directory below). Alkaline loess plus compost still needs numbers.
- Drip: pressure regulator, screen filter, extra emitters, a spare timer battery.
- Hand lens (10×) for mites vs thrips vs dust.
- Labeled sample bags for the plant clinic or the Puyallup diagnostic lab.
The land-grant stack (use this, not vibes)
| Shop | What it is for | Door |
|---|---|---|
| WSU Benton-Franklin Extension | Local programs, offices in Kennewick, Prosser, Pasco | extension.wsu.edu/benton-franklin |
| Master Gardener plant clinic | Home-garden ID, May–Oct; no soil/water tests | Ask a Master Gardener |
| HortSense | Home landscape/garden pest fact sheets | hortsense.cahnrs.wsu.edu |
| PestSense | Mostly indoor/structural pests | pestsense.cahnrs.wsu.edu |
| Gardening in WA State | Statewide home garden publications | gardening.wsu.edu |
| PNW Handbooks | Insect, weed, and disease management (commercial-grade) | pnwhandbooks.org |
| WSU Puyallup Plant Clinic | Diagnostic lab when the local clinic needs a specialist | puyallup.wsu.edu/plantclinic |
| WSU Prosser IAREC | Irrigated-ag research 30 minutes away; not a backyard hotline, but the science lives there | iarec.wsu.edu |
| AgWeatherNet | WSU station data; better than a Seattle forecast for heat and wind | weather.wsu.edu |
| Web Soil Survey | NRCS map unit for your lot (loess, sands, pH clues) | websoilsurvey.nrcs.usda.gov |
| KID | Kennewick irrigation delivery and homeowner rules | kid.org |
| Benton Conservation District | Stewardship, Heritage Gardens, water-wise help | bentoncd.org |
Soil labs (WSU will not run your home sample)
WSU Extension is explicit: the Benton-Franklin clinic does not test soil or water, and the Puyallup plant clinic is not a nutrient lab. Use WSU’s listing of analytical laboratories serving the Pacific Northwest and pick a lab that reports pH, salts/EC, organic matter, and available P and K. Follow that lab’s sampling depth (usually 0–6 or 0–12 inches, cores mixed, not a single trowel scoop from the compost crater). Ask for an irrigated-crop or home-garden interpretation, then discount any lime recommendation that ignores our alkaline baseline.
Commercial basin labs exist (several farm labs around Moses Lake and the mid-Columbia). Names and portals change; this page will not invent a phone book. Start from the WSU directory and call two labs about home-garden panels and turnaround.
Seed houses with an inland bias
Irish Eyes for a Washington-grown catalog. Territorial and Johnny’s Selected Seeds for trial notes and DTM that you should still pad for wind and 100°F stalls. For long-day storage onions, believe the photoperiod line on the packet, not a short-day sweet onion display in March. Adaptive Seeds (Sweet Home, OR) is a real Willamette house — useful genetics, still not a substitute for irrigation culture.
Deeper: how to submit a plant sample so someone can help
Clinic and lab people need the whole story: crop (tomato vs jalapeño), planting date, irrigation method, last fertilizer, and whether the symptom started after a heat run or a missed watering. Photograph the bed, the whole plant, and the leaf underside. Bag a range of symptoms (fresh, not compost). Do not mail rotten fruit in a warm car and expect taxonomy. For insects, a clear photo next to a coin plus a few specimens in a dry vial beats a smashed mystery on a napkin.
Unit close
Buy drip hardware. Test the dirt on a schedule. Ask Benton-Franklin Extension and HortSense before you ask a maritime blog. Seed packets assume a kinder wind than ours.