Adams County, WA — Planting Guide
Adams County is in USDA Zone 7a. The average last spring frost is May 7 and the first fall frost is October 3, giving you a growing season of approximately 149 days.
At an elevation of 2,402 ft, Adams County receives approximately 17.1 in of rainfall annually. Summer highs average 91°F with winter lows around 23°F. The predominant soil type is Silt Loam.
🌡️ Zone
7a (0°F to 5°F min)
❄️ Last Frost
May 7
🍂 First Frost
October 3
📅 Growing Season
149 days
⛰️ Elevation
2,402 ft
🌧️ Annual Rainfall
17.1 in
Adams County Soil Profile
Soil Type
Silt Loam
Soil pH
6.0-7.0
Drainage
Well Drained
Soil & Growing Conditions in Adams County
Soil Type
Silt Loam
Ideal for most crops — holds moisture and nutrients while draining well.
Watering Needs
With 17.1 inches annually, regular irrigation is essential. Drip systems and heavy mulching conserve water.
Season Tips
149-day frost-free season
Start warm-season crops indoors and focus on short-season varieties. Cold frames extend your season by 3–4 weeks in fall.
Your Free Printable Garden Planner
Plan every bed, every planting, every harvest — in one place. This 22-page printable includes your zone's planting calendar, a month-by-month task list, a seed inventory tracker, a harvest log, and succession-planting charts. Built to print, write in, and actually use all season.
Recommended for Your Garden
Test your soil pH, nitrogen, phosphorus, and potassium levels before planting.
Get instant, accurate soil pH readings to fine-tune your amendments.
Boost soil fertility and structure with rich, well-aged organic compost.
🥬 Vegetables to Grow in Adams County
112 vegetables that grow well in Zone 7a with planting dates for Adams County.
Show all 112 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Apr 9 | May 14 | May 21 | — | Aug 13 – Sep 17 | 80–100 |
| Amaranth | Mar 19 | May 14 | May 21 | — | Aug 20 – Oct 8 | 90–120 |
| Artichoke | — | — | May 21 | — | Sep 24 – Dec 3 | 120–180 |
| Arugula | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 11 – Aug 13 | 30–50 |
| Asparagus | — | — | May 21 | — | — | 730–1095 |
| Beets | — | Apr 23 | — | Jul 25 | Jun 18 – Jul 16 | 50–70 |
| Belgian Endive | Apr 2 | Apr 23 | May 7 | Jul 25 | Aug 27 – Oct 22 | 110–150 |
| Bitter Melon | Mar 19 | May 14 | May 21 | — | Jul 23 – Sep 3 | 60–90 |
| Black Beans | — | May 14 | — | — | Aug 13 – Oct 1 | 90–120 |
| Bok Choy | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 18 – Jul 23 | 40–60 |
| Broccoli | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 9 – Aug 20 | 60–90 |
| Broccoli Rabe | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 18 – Jul 23 | 40–60 |
| Brussels Sprouts | Apr 2 | Apr 23 | May 7 | Jul 25 | Aug 6 – Oct 1 | 90–130 |
| Butternut Squash | Apr 9 | May 14 | May 21 | — | Aug 20 – Sep 24 | 85–110 |
| Cabbage | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 9 – Sep 3 | 60–100 |
| Calabash | Mar 19 | May 14 | May 21 | — | Aug 13 – Oct 8 | 80–120 |
| Cardoon | — | — | May 21 | — | Sep 24 – Nov 5 | 120–150 |
| Carrots | — | Apr 23 | — | Jul 25 | Jun 25 – Jul 30 | 60–80 |
| Cauliflower | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Sep 3 | 55–100 |
| Celeriac | Apr 2 | Apr 23 | May 7 | Jul 25 | Aug 20 – Sep 24 | 100–120 |
| Celery | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 30 – Sep 24 | 80–120 |
| Celtuce | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 9 – Aug 20 | 60–90 |
| Chard | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Aug 20 | 50–60 |
| Chayote | Mar 19 | May 14 | May 21 | — | Sep 24 – Dec 3 | 120–180 |
| Chickpeas | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 30 – Sep 10 | 80–110 |
| Chicory | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 9 – Aug 20 | 60–85 |
| Chinese Cabbage | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Jul 30 | 50–70 |
| Christmas Lima Beans | Mar 19 | May 14 | May 21 | — | Aug 13 – Sep 17 | 80–100 |
| Collard Greens | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Sep 3 | 55–75 |
| Corn | — | May 14 | — | — | Jul 16 – Sep 10 | 60–100 |
| Cowpeas | — | May 14 | — | — | Jul 16 – Aug 27 | 60–90 |
| Cress | Apr 2 | Apr 23 | May 7 | Jul 25 | May 21 – Jun 11 | 14–21 |
| Crookneck Squash | Apr 9 | May 14 | May 21 | — | Jul 9 – Aug 6 | 45–60 |
| Crosne | — | Apr 23 | — | Jul 25 | Sep 24 – Nov 26 | 150–200 |
| Cucumber | Apr 9 | May 14 | May 21 | — | Jul 16 – Sep 10 | 50–70 |
| Daikon | — | Apr 23 | — | Jul 25 | Jun 18 – Jul 16 | 50–70 |
| Delicata Squash | Apr 9 | May 14 | May 21 | — | Aug 13 – Sep 17 | 80–100 |
| Edamame | — | May 14 | — | — | Jul 30 – Sep 10 | 75–100 |
| Eggplant | Mar 5 | May 14 | May 21 | — | Jul 30 – Oct 1 | 65–85 |
| Endive | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 25 – Jul 30 | 45–65 |
| Escarole | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Jul 30 | 50–70 |
| Fava Beans | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 23 – Sep 3 | 75–100 |
| Fennel | Mar 19 | May 14 | May 21 | — | Jul 23 – Sep 3 | 60–90 |
| Garlic | — | — | — | Aug 22 | Nov 21 – Apr 3 | 90–240 |
| Green Beans | — | May 14 | — | — | Jul 9 – Sep 3 | 50–65 |
| Horseradish | — | — | May 21 | — | Sep 24 – Dec 3 | 120–180 |
| Hot Peppers | Mar 5 | May 14 | May 21 | — | Jul 30 – Nov 5 | 70–120 |
| Hubbard Squash | Apr 9 | May 14 | May 21 | — | Sep 3 – Oct 8 | 100–120 |
| Jicama | Mar 19 | May 14 | May 21 | — | Sep 24 – Dec 3 | 120–180 |
| Kabocha | Apr 9 | May 14 | May 21 | — | Aug 20 – Sep 17 | 85–100 |
| Kai Lan | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 25 – Jul 23 | 45–60 |
| Kale | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Aug 27 | 50–70 |
| Kidney Beans | — | May 14 | — | — | Aug 13 – Sep 17 | 85–110 |
| Kohlrabi | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 25 – Jul 30 | 45–65 |
| Komatsuna | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 11 – Jul 16 | 35–50 |
| Leeks | Apr 2 | Apr 23 | May 7 | Jul 25 | Aug 6 – Oct 22 | 90–150 |
| Lentils | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 30 – Sep 10 | 80–110 |
| Lettuce | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 11 – Aug 20 | 30–60 |
| Lima Beans | — | May 14 | — | — | Jul 16 – Aug 27 | 60–90 |
| Loofah | Mar 19 | May 14 | May 21 | — | Sep 3 – Nov 5 | 100–150 |
| Luffa | Mar 19 | May 14 | May 21 | — | Aug 20 – Nov 5 | 90–150 |
| Mache | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 18 – Jul 23 | 40–60 |
| Malabar Spinach | Mar 19 | May 14 | May 21 | — | Jul 16 – Aug 13 | 55–70 |
| Melon | Apr 9 | May 14 | May 21 | — | Jul 30 – Sep 17 | 70–100 |
| Microgreens | Apr 2 | Apr 23 | May 7 | Jul 25 | May 14 – Jun 11 | 7–21 |
| Mitsuba | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jun 25 – Aug 20 | 50–70 |
| Mizuna | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 11 – Jul 9 | 30–45 |
| Mustard Greens | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 11 – Aug 13 | 30–50 |
| Napa Cabbage | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Aug 6 | 55–75 |
| New Zealand Spinach | Mar 19 | May 14 | May 21 | — | Jul 16 – Aug 13 | 55–70 |
| Okra | Mar 19 | May 14 | May 21 | — | Jul 16 – Sep 10 | 50–65 |
| Onion | Apr 2 | Apr 23 | May 7 | Jul 25 | Aug 6 – Sep 24 | 90–120 |
| Pac Choi | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 18 – Jul 16 | 40–55 |
| Parsnip | — | Apr 23 | — | Jul 25 | Aug 6 – Sep 17 | 100–130 |
| Patty Pan Squash | Apr 9 | May 14 | May 21 | — | Jul 9 – Aug 6 | 45–60 |
| Peas | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Aug 27 | 55–70 |
| Peppers | Mar 5 | May 14 | May 21 | — | Jul 23 – Oct 1 | 60–90 |
| Pole Beans | Mar 19 | May 14 | May 21 | — | Jul 16 – Sep 10 | 55–70 |
| Potatoes | Mar 19 | May 14 | May 21 | — | Jul 30 – Oct 8 | 70–120 |
| Pumpkin | Apr 9 | May 14 | May 21 | — | Aug 20 – Oct 8 | 85–120 |
| Purslane | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 18 – Jul 23 | 40–60 |
| Radicchio | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 9 – Aug 13 | 60–80 |
| Radish | — | Apr 23 | — | Jul 25 | May 21 – Jun 11 | 22–35 |
| Rhubarb | — | — | May 28 | — | — | 365–730 |
| Romanesco | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 23 – Sep 3 | 75–100 |
| Rutabaga | — | Apr 23 | — | Jul 25 | Jul 16 – Aug 20 | 80–100 |
| Salsify | — | Apr 23 | — | Jul 25 | Aug 6 – Sep 17 | 100–130 |
| Savoy Cabbage | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 16 – Sep 10 | 70–110 |
| Scallions | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Jul 30 | 50–70 |
| Scarlet Runner Beans | Mar 19 | May 14 | May 21 | — | Jul 23 – Aug 27 | 60–80 |
| Shallot | Apr 2 | Apr 23 | May 7 | Jul 25 | Aug 6 – Sep 24 | 90–120 |
| Shiso | Mar 19 | May 14 | May 21 | — | Jul 16 – Sep 10 | 50–70 |
| Snap Peas | Mar 19 | May 14 | May 21 | — | Jul 16 – Sep 10 | 55–70 |
| Snow Peas | Apr 2 | Apr 23 | May 7 | Jul 25 | Jul 2 – Aug 27 | 50–65 |
| Soybeans | — | May 14 | — | — | Aug 6 – Oct 1 | 80–120 |
| Spaghetti Squash | Apr 9 | May 14 | May 21 | — | Aug 20 – Sep 17 | 85–100 |
| Spinach | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 11 – Aug 13 | 35–50 |
| Squash (Summer) | Apr 9 | May 14 | May 21 | — | Jul 9 – Sep 10 | 45–65 |
| Squash (Winter) | Apr 9 | May 14 | May 21 | — | Aug 13 – Oct 8 | 80–120 |
| Sunchoke | — | — | May 21 | — | Sep 10 – Nov 5 | 110–150 |
| Sweet Corn | — | May 14 | — | — | Jul 16 – Aug 27 | 60–90 |
| Sweet Potatoes | Mar 19 | May 14 | May 21 | — | Aug 20 – Oct 8 | 90–120 |
| Tatsoi | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 11 – Jul 16 | 35–50 |
| Tomatillo | Mar 19 | May 14 | May 21 | — | Jul 23 – Oct 1 | 60–85 |
| Tomatoes | Mar 19 | May 14 | May 21 | — | Jul 23 – Oct 1 | 60–85 |
| Turnip | — | Apr 23 | — | Jul 25 | Jun 4 – Jul 9 | 40–60 |
| Watercress | Apr 2 | Apr 23 | May 7 | Jul 25 | Jun 18 – Jul 23 | 40–60 |
| Watermelon | Apr 9 | May 14 | May 21 | — | Jul 30 – Sep 17 | 70–100 |
| Wax Beans | — | May 14 | — | — | Jul 9 – Sep 3 | 50–65 |
| Winter Melon | Mar 19 | May 14 | May 21 | — | Aug 20 – Oct 8 | 90–120 |
| Yard Long Beans | Mar 19 | May 14 | May 21 | — | Jul 16 – Aug 27 | 55–80 |
| Zucchini | Apr 9 | May 14 | May 21 | — | Jul 9 – Sep 3 | 45–60 |
🍓 Fruits to Grow in Adams County
31 fruits that grow well in Zone 7a with planting dates for Adams County.
Show all 31 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 28 | — | Aug 27 – Dec 10 | 90–180 |
| Aronia | — | — | May 28 | — | — | 730–1095 |
| Blackberries | — | — | May 28 | — | — | 365–730 |
| Blueberries | — | — | May 28 | — | — | 730–1095 |
| Boysenberries | — | — | May 28 | — | — | 365–730 |
| Cantaloupe | — | — | May 28 | — | Aug 6 – Sep 10 | 70–90 |
| Che Fruit | — | — | May 28 | — | — | 1095–1825 |
| Cranberries | — | — | May 28 | — | — | 730–1095 |
| Currants | — | — | May 28 | — | — | 730–1095 |
| Elderberries | — | — | May 28 | — | — | 730–1095 |
| Figs | — | — | May 28 | — | — | 730–1825 |
| Goji Berries | — | — | May 28 | — | — | 730–1095 |
| Gooseberries | — | — | May 28 | — | — | 730–1095 |
| Grapes | — | — | May 28 | — | — | 730–1095 |
| Ground Cherry | — | — | May 28 | — | Aug 6 – Oct 1 | 65–80 |
| Hardy Kiwi | — | — | May 28 | — | — | 1095–1825 |
| Haskaps | — | — | May 28 | — | — | 730–1095 |
| Honeydew | — | — | May 28 | — | Aug 20 – Oct 1 | 80–110 |
| Jostaberry | — | — | May 28 | — | — | 730–1095 |
| Kiwi | — | — | May 28 | — | — | 1095–1825 |
| Lingonberries | — | — | May 28 | — | — | 730–1095 |
| Loquat | — | — | May 28 | — | — | 730–1825 |
| Medlar | — | — | May 28 | — | — | 1095–1825 |
| Mulberries | — | — | May 28 | — | — | 730–1825 |
| Pawpaw | — | — | May 28 | — | — | 1095–2555 |
| Persimmon | — | — | May 28 | — | — | 1095–2555 |
| Pomegranate | — | — | May 28 | — | — | 730–1095 |
| Quince | — | — | May 28 | — | — | 1095–1825 |
| Raspberries | — | — | May 28 | — | — | 365–730 |
| Serviceberries | — | — | May 28 | — | — | 730–1095 |
| Strawberries | — | — | May 28 | — | Aug 27 – Jan 7 | 90–365 |
🌿 Herbs to Grow in Adams County
36 herbs that grow well in Zone 7a with planting dates for Adams County.
Show all 36 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Apr 2 | Apr 23 | Apr 30 | Jul 25 | — | 365–730 |
| Anise | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jul 30 – Oct 15 | 90–120 |
| Basil | Mar 19 | May 14 | May 21 | — | Jul 16 – Sep 17 | 50–75 |
| Bee Balm | — | — | May 14 | — | Aug 13 – Oct 29 | 90–120 |
| Borage | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jun 25 – Aug 13 | 50–60 |
| Caraway | Apr 2 | Apr 23 | Apr 30 | Jul 25 | — | 365–450 |
| Catnip | — | — | May 14 | — | Jul 16 – Sep 17 | 60–80 |
| Chamomile | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jul 2 – Sep 10 | 60–90 |
| Chervil | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jun 11 – Aug 13 | 40–60 |
| Chives | — | — | May 14 | — | Jul 16 – Sep 24 | 60–90 |
| Cilantro | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jun 11 – Aug 13 | 40–60 |
| Comfrey | — | — | May 14 | — | Jul 16 – Sep 24 | 60–90 |
| Cumin | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Aug 13 – Oct 15 | 100–120 |
| Dill | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jun 11 – Aug 13 | 40–60 |
| Epazote | Mar 19 | May 14 | May 21 | — | Jul 9 – Sep 3 | 45–60 |
| Fennel (herb) | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jul 2 – Sep 10 | 60–90 |
| Feverfew | — | — | May 14 | — | Aug 13 – Oct 29 | 90–120 |
| Garlic Chives | — | — | May 14 | — | Jul 16 – Sep 24 | 60–90 |
| Horehound | — | — | May 14 | — | Jul 30 – Sep 24 | 75–90 |
| Hyssop | — | — | May 14 | — | Jul 23 – Sep 24 | 70–90 |
| Lemon Balm | — | — | May 14 | — | Jul 16 – Sep 3 | 60–70 |
| Lemon Thyme | — | — | May 14 | — | Jul 23 – Sep 24 | 70–90 |
| Lovage | — | — | May 14 | — | Jul 23 – Sep 24 | 70–90 |
| Marjoram | — | — | May 14 | — | Jul 16 – Sep 24 | 60–90 |
| Mint | — | — | May 14 | — | Jul 16 – Sep 24 | 60–90 |
| Oregano | — | — | May 14 | — | Jul 16 – Sep 24 | 60–90 |
| Parsley | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jul 2 – Sep 3 | 60–80 |
| Rosemary | — | — | May 14 | — | Aug 6 – Dec 24 | 80–180 |
| Rue | — | — | May 14 | — | Jul 23 – Sep 24 | 70–90 |
| Sage | — | — | May 14 | — | Jul 30 – Sep 24 | 75–90 |
| Savory | — | — | May 14 | — | Jul 9 – Sep 3 | 50–70 |
| Sorrel | Apr 2 | Apr 23 | Apr 30 | Jul 25 | Jun 11 – Aug 13 | 40–60 |
| Tarragon | — | — | May 14 | — | Jul 16 – Sep 24 | 60–90 |
| Thai Basil | Mar 19 | May 14 | May 21 | — | Jul 16 – Sep 17 | 50–75 |
| Thyme | — | — | May 14 | — | Jul 23 – Sep 24 | 70–90 |
| Valerian | — | — | May 14 | — | Sep 17 – Dec 24 | 120–180 |
🌸 Flowers to Grow in Adams County
53 flowers that grow well in Zone 7a with planting dates for Adams County.
Show all 53 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 26 | May 7 | May 7 | — | Jul 2 – Oct 22 | 60–75 |
| Alliums | — | — | — | Aug 29 | Sep 26 – Oct 17 | 28–42 |
| Anemones | — | — | — | Aug 8 | Aug 22 – Sep 19 | 90–120 |
| Astilbe | Mar 5 | — | May 14 | — | Jul 23 – Sep 17 | 70–100 |
| Bachelor's Button | Mar 26 | Apr 2 | May 7 | Aug 8 | Jul 9 – Oct 8 | 60–90 |
| Begonias | Feb 26 | — | May 7 | — | Jul 16 – Nov 5 | 70–90 |
| Black-eyed Susan | Mar 5 | May 7 | May 14 | — | Jul 23 – Nov 26 | 60–80 |
| Bleeding Hearts | Mar 5 | — | May 14 | — | Jul 2 – Aug 6 | 60–90 |
| Calendula | Mar 26 | Apr 2 | May 7 | Aug 8 | Jun 25 – Oct 8 | 50–70 |
| California Poppy | — | Apr 9 | — | Aug 8 | Jun 18 – Aug 27 | 60–90 |
| Celosia | Apr 9 | May 7 | May 7 | — | Jul 9 – Nov 5 | 60–90 |
| Columbine | Mar 12 | May 14 | May 14 | — | Jul 2 – Aug 6 | 70–100 |
| Coreopsis | Mar 5 | May 7 | May 14 | — | Jul 16 – Nov 26 | 60–80 |
| Cosmos | Apr 9 | May 7 | May 7 | — | Jul 16 – Nov 5 | 60–90 |
| Crocus | — | — | — | Aug 29 | Jul 25 – Aug 15 | 10–20 |
| Daffodils | — | — | — | Aug 29 | Aug 1 – Aug 22 | 20–40 |
| Dahlias | Apr 9 | May 14 | May 14 | — | Jul 23 – Nov 26 | 70–120 |
| Daylily | Mar 5 | — | May 14 | — | Jul 23 – Nov 26 | 60–90 |
| Dianthus | Mar 12 | Apr 2 | Apr 16 | — | Jun 4 – Sep 3 | 60–80 |
| Echinacea (Purple Coneflower) | Mar 5 | May 14 | May 14 | — | Jul 30 – Nov 26 | 70–90 |
| Foxglove | Mar 12 | May 14 | May 14 | — | Jul 2 – Aug 6 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 19 | May 14 | May 14 | — | Jul 23 – Dec 10 | 70–100 |
| Geraniums | Feb 26 | — | May 7 | — | Jul 16 – Nov 5 | 70–100 |
| Gladiolus | — | May 7 | May 7 | — | Jul 16 – Nov 19 | 70–100 |
| Hostas | Feb 26 | — | May 14 | — | Jul 23 – Nov 26 | 60–90 |
| Hyacinths | — | — | — | Aug 29 | Aug 22 – Sep 12 | 14–28 |
| Hydrangeas | Feb 26 | — | May 14 | — | Jul 23 – Nov 12 | 90–150 |
| Impatiens | Mar 12 | — | May 14 | — | Jul 23 – Nov 12 | 60–75 |
| Irises | — | Division | May 14 | — | Jul 2 – Aug 6 | 60–100 |
| Larkspur | — | Apr 9 | — | Jul 25 | Jun 18 – Aug 27 | 60–90 |
| Lavender | Mar 5 | — | May 21 | — | Jul 30 – Oct 8 | 90–120 |
| Lilies | — | Division | May 14 | — | Jul 23 – Nov 12 | 70–120 |
| Lobelia | Mar 5 | — | Apr 16 | — | Jun 11 – Sep 3 | 70–80 |
| Lupine | Mar 12 | May 14 | May 14 | — | Jul 2 – Aug 6 | 75–100 |
| Marigolds | Mar 26 | May 7 | May 7 | — | Jul 2 – Oct 8 | 50–70 |
| Nasturtium | Apr 9 | May 7 | May 7 | — | Jul 2 – Nov 5 | 55–65 |
| Pansy | Feb 26 | — | May 7 | Jul 25 | Jul 2 – Sep 10 | 70–90 |
| Peonies | — | Division | May 14 | — | Jul 9 – Aug 13 | 90–120 |
| Petunia | Mar 12 | — | May 14 | — | Jul 23 – Nov 12 | 70–90 |
| Phlox | Mar 5 | May 14 | May 14 | — | Jul 23 – Oct 15 | 80–110 |
| Portulaca | Apr 9 | May 7 | May 7 | — | Jun 25 – Oct 22 | 50–70 |
| Ranunculus | — | — | — | Aug 8 | Sep 5 – Oct 3 | 90–120 |
| Roses | Feb 26 | — | May 14 | — | Jul 23 – Nov 26 | 90–180 |
| Salvia | Mar 12 | — | May 7 | — | Jul 16 – Nov 5 | 70–90 |
| Sedum (Stonecrop) | Mar 5 | — | May 14 | — | Sep 3 – Nov 26 | 60–90 |
| Snapdragon | Feb 26 | Apr 9 | May 7 | Aug 8 | Jul 16 – Oct 8 | 70–100 |
| Sunflower | Apr 16 | May 7 | May 7 | — | Jul 30 – Nov 5 | 70–100 |
| Sweet Alyssum | Mar 26 | Apr 9 | May 7 | Aug 22 | Jun 18 – Sep 10 | 45–60 |
| Sweet Pea | — | Apr 2 | — | Aug 8 | Jun 11 – Sep 3 | 65–85 |
| Tulips | — | — | — | Aug 29 | Aug 15 – Sep 5 | 15–30 |
| Vinca (Annual) | Feb 26 | — | May 7 | — | Jul 16 – Nov 5 | 70–90 |
| Yarrow | Mar 5 | May 7 | May 14 | — | Jul 16 – Nov 26 | 60–90 |
| Zinnia | Apr 9 | May 7 | May 7 | — | Jul 16 – Nov 5 | 60–70 |
Monthly Planting Guide for Adams County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Adams County.
Frequently Asked Questions
What planting zone is Adams County, WA?
Adams County is in USDA Hardiness Zone 7a. This zone classification determines which perennial plants survive winter and sets the baseline for frost timing across the county.
When is the last frost in Adams County, WA?
Based on 30 years of NOAA weather station data, the median last spring frost in Adams County falls around May 7. Plan transplants and direct-sow dates relative to this date.
When is the first fall frost in Adams County, WA?
The median first fall frost in Adams County arrives around October 3. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
Your Adams County Garden Planner — Free
A 22-page printable planner built for Adams County (Zone 7a). Planting dates, a month-by-month schedule, harvest log, seed inventory, and succession charts — all dialed in for your exact growing season.
The Gardener's Encyclopedia to Companion Planting
The pairings that make vegetables, herbs, and flowers grow better — and the ones that quietly wreck a bed.
- Proven pairings for 200+ vegetables, herbs, flowers, and fruits
- Full seed-starting + planting schedule with timing and spacing
- Bonus: square-foot gardening guide + printable seasonal planners
Seed Saving & Storage Guide
Most saved seeds go bad before next season. This shows exactly when to pick, how to dry, and where to store seeds from 200 plants so yours don't.
- 200 plants, step-by-step: life cycle, pollination type, isolation
- Exact temperature + humidity ranges that keep seeds viable
- Bonus: searchable Google Sheets tracker + custom GPT assistant
Composting Guide for Homesteaders
Turn kitchen scraps and yard waste into compost that actually feeds the garden — instead of a pile that smells, attracts pests, and never breaks down.
- 14 sections on composting methods, soil science, and troubleshooting
- The 7-step hot-compost system from start to finish
- Bonus tools: troubleshooting chart, safety guide, monitoring log