Harney County, OR — Planting Guide
Harney County is in USDA Zone 5b. The average last spring frost is June 17 and the first fall frost is September 6, giving you a growing season of approximately 81 days.
At an elevation of 679 ft, Harney County receives approximately 22.1 in of rainfall annually. Summer highs average 87°F with winter lows around 12°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 25 days year to year — ranging from May 29 in warm years to June 24 in cold years. Harney County scores 68/100 (Good) on the Microclimate Index.
🌡️ Zone
5b (-15°F to -10°F min)
❄️ Last Frost
June 17
🍂 First Frost
September 6
📅 Growing Season
81 days
⛰️ Elevation
679 ft
🌧️ Annual Rainfall
22.1 in
Monthly Watering Calendar
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 3.3 in | 17 days | — | None |
| Feb | 2.2 in | 16 days | — | None |
| Mar | 1.9 in | 13 days | — | None |
| Apr | 1.5 in | 11 days | 2.8 in | High |
| May | 1.4 in | 10 days | 2.9 in | High |
| Jun | 0.9 in | 7 days | 3.4 in | Critical |
| Jul | 0.4 in | 2 days | 3.9 in | Critical |
| Aug | 0.4 in | 2 days | 3.9 in | Critical |
| Sep | 0.9 in | 4 days | 3.4 in | Critical |
| Oct | 2 in | 9 days | 2.3 in | High |
| Nov | 3.6 in | 14 days | — | None |
| Dec | 3.7 in | 20 days | — | None |
Annual total: 22.2 in. Water needs vary by crop — tomatoes need ~1.2"/week while herbs like rosemary need only 0.3"/week. Check individual plant pages for crop-specific water budgets that factor in your county's rainfall and soil drainage.
Harney County Soil Profile
Soil Type
Silt Loam
Soil pH
5.6-6.4
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Jun 24 | Sep 25 | 93 days |
| Cautious | Jun 20 | Sep 14 | 86 days |
| Average year | Jun 17 | Sep 6 | 81 days |
| Optimistic | Jun 12 | Aug 30 | 79 days |
| Aggressive (risky) | May 29 | Aug 13 | 76 days |
Not very — frost dates can vary by ±25 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Gardening Difficulty Score
Harney County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Harney County
Free expert help is closer than you think. Your county's cooperative extension office connects you with trained gardeners, soil testing labs, and local programs — all specific to Harney County's climate and soil.
County Extension Office
Harney County Oregon State University Extension Extension Office
Phone: 541-737-2713
Visit Extension Office Website →
Extension offices are run by land-grant universities and funded by the USDA. Their advice is free, research-based, and tailored to your county's specific conditions.
Master Gardener Program
Free gardening help from trained volunteers
Master Gardeners are community volunteers who complete 40–60 hours of university horticultural training. They answer gardening questions, diagnose plant problems, and offer workshops — all free.
Many extension offices run a Master Gardener hotline where you can call or email with photos of plant problems for free diagnosis.
Soil Testing
Available through your extension office
Before amending your soil, get it tested. Your extension office offers soil testing (typically $10–$25) that tells you exact pH, nutrient levels, and amendment recommendations specific to what you want to grow.
Services Available in Harney County
Finding local nurseries & garden centers in Harney County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Harney County's soil and climate that big-box stores can't. Plants from local growers are typically hardier because they're already acclimated to your zone.
How to Find Them
Search for "nurseries near Harney County OR" or "garden center Harney County" on Google Maps. Also check with your extension office — they often maintain lists of reputable local nurseries and plant sales.
Community gardens & gardening groups
Community gardens are a great way to learn from experienced gardeners in your area, especially if you're limited on space. Search "community garden Harney County OR" or check your extension office and local parks department. Facebook groups like "Harney County Gardeners" or "Oregon Gardening" are also excellent for local advice and plant swaps.
What to Plant After Your Harvest
After your first crops finish, use the remaining frost-free days to grow a second round.
Sunlight & Day Length
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
15.2 hours
Summer solstice daylight
Shortest Day
8.8 hours
Winter solstice daylight
Peak Sun Hours
10.3 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.2 hr | 2.3 hr | Short day |
| February | 10.3 hr | 3.1 hr | Short day |
| March | 11.6 hr | 4 hr | Short day |
| April | 13.2 hr | 5.7 hr | Neutral |
| May | 14.5 hr | 6.9 hr | Long day |
| June | 15.2 hr | 8 hr | Long day |
| July | 14.9 hr | 10.3 hr | Long day |
| August | 13.8 hr | 8.9 hr | Neutral |
| September | 12.3 hr | 7.4 hr | Neutral |
| October | 10.8 hr | 4.1 hr | Short day |
| November | 9.5 hr | 2.4 hr | Short day |
| December | 8.8 hr | 2 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from May through Sep.
Best Month to Compost
Jun
Microbial activity peaks when soil is warm.
Active Composting
6 months
Solid season. Piles go dormant in winter.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 23°F | 31°F | ❄️ Dormant | ~36 weeks |
| Feb | 22°F | 31°F | ❄️ Dormant | ~36 weeks |
| Mar | 30°F | 33°F | ❄️ Dormant | ~36 weeks |
| Apr | 45°F | 43°F | 🐢 Slow | ~24 weeks |
| May | 60°F | 55°F | ♻️ Active | ~14 weeks |
| Jun | 70°F | 65°F | 🔥 Peak | ~8 weeks |
| Jul | 78°F | 70°F | 🔥 Peak | ~8 weeks |
| Aug | 79°F | 72°F | 🔥 Peak | ~8 weeks |
| Sep | 71°F | 69°F | 🔥 Peak | ~8 weeks |
| Oct | 58°F | 59°F | ♻️ Active | ~14 weeks |
| Nov | 44°F | 47°F | 🐢 Slow | ~24 weeks |
| Dec | 31°F | 39°F | ❄️ Dormant | ~36 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Harney County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 5 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | Moderate | May, Jun, Jul, Aug |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash bugs | Low | Jun, Jul, Aug |
| Tomato hornworms | Low | Jul, Aug |
| Cabbage loopers | Low | May, Jun, Jul, Aug |
Organic pest management tips
- Maintain healthy soil with regular compost additions to build natural pest resistance
- Practice crop rotation annually to break pest cycles
- Encourage beneficial insects with flowering herbs like dill, fennel, and yarrow
Cover Crops for Harney County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Jun 19 | Jul 5 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Jun 23 | Jul 12 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | May 22 | Jul 5 | ✓ Yes | Living mulch, fixes nitrogen, permanent ground cover |
Summer Cover Crops (1 options) — Fill gaps and suppress weeds between plantings
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Sunflowers | Jul 11 | Aug 23 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (6 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Jul 14 | May 27 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Daikon radish | Jul 14 | May 27 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jun 13 | Jun 3 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Jul 28 | May 27 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 9 | Jun 3 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 17 | May 27 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 8 mph
Fall: 8 mph Winter: 12 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
4.5/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (312 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
11,064 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
7 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 2,250 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Jan, Feb, Nov, Dec
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jun, Jul, Aug, Sep
Dry months when you'll rely on stored water — size your storage for this gap.
Rainwater collection tips for your area
- Your county receives approximately 22.2 inches of rain per year
- A 1,000 sq ft roof can collect roughly 11,064 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jun, Jul, Aug)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Harney County
Soil Type
Silt Loam
Soil pH 5.6–6.4 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 5.5/10
Moderate drought pressure. Drip irrigation and mulching are highly recommended to maintain soil moisture through summer.
Season Tips
81-day frost-free season
A short season means indoor starts are critical for warm-season crops. Prioritise cold-hardy, fast-maturing varieties and use row covers to extend autumn harvests.
Free Garden Planner
Plan your entire garden season — organize planting dates, track what you're growing, and know exactly when to start seeds, transplant, and harvest.
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 Harney County
106 vegetables that grow well in Zone 5b with planting dates for Harney County.
Show all 106 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | May 13 | Jun 24 | Jul 1 | Sep 23 – Oct 28 | 80–100 |
| Amaranth | Apr 22 | Jun 24 | Jul 1 | Sep 30 – Nov 18 | 90–120 |
| Arugula | May 13 | Jun 3 | Jun 17 | Jul 22 – Sep 23 | 30–50 |
| Asparagus | — | — | Jul 1 | — | 730–1095 |
| Beets | — | Jun 3 | — | Jul 29 – Aug 26 | 50–70 |
| Belgian Endive | May 13 | Jun 3 | Jun 17 | Oct 7 – Dec 2 | 110–150 |
| Bitter Melon | Apr 22 | Jun 24 | Jul 1 | Sep 2 – Oct 14 | 60–90 |
| Black Beans | — | Jun 24 | — | Sep 23 – Nov 11 | 90–120 |
| Bok Choy | May 13 | Jun 3 | Jun 17 | Jul 29 – Sep 2 | 40–60 |
| Broccoli | May 13 | Jun 3 | Jun 17 | Aug 19 – Sep 30 | 60–90 |
| Broccoli Rabe | May 13 | Jun 3 | Jun 17 | Jul 29 – Sep 2 | 40–60 |
| Brussels Sprouts | May 13 | Jun 3 | Jun 17 | Sep 16 – Nov 11 | 90–130 |
| Butternut Squash | May 13 | Jun 24 | Jul 1 | Sep 30 – Nov 4 | 85–110 |
| Cabbage | May 13 | Jun 3 | Jun 17 | Aug 19 – Oct 14 | 60–100 |
| Calabash | Apr 22 | Jun 24 | Jul 1 | Sep 23 – Nov 18 | 80–120 |
| Carrots | — | Jun 3 | — | Aug 5 – Sep 9 | 60–80 |
| Cauliflower | May 13 | Jun 3 | Jun 17 | Aug 12 – Oct 14 | 55–100 |
| Celeriac | May 13 | Jun 3 | Jun 17 | Sep 30 – Nov 4 | 100–120 |
| Celery | May 13 | Jun 3 | Jun 17 | Sep 9 – Nov 4 | 80–120 |
| Celtuce | May 13 | Jun 3 | Jun 17 | Aug 19 – Sep 30 | 60–90 |
| Chard | May 13 | Jun 3 | Jun 17 | Aug 12 – Sep 30 | 50–60 |
| Chickpeas | May 13 | Jun 3 | Jun 17 | Sep 9 – Oct 21 | 80–110 |
| Chicory | May 13 | Jun 3 | Jun 17 | Aug 19 – Sep 30 | 60–85 |
| Chinese Cabbage | May 13 | Jun 3 | Jun 17 | Aug 12 – Sep 9 | 50–70 |
| Christmas Lima Beans | Apr 22 | Jun 24 | Jul 1 | Sep 23 – Oct 28 | 80–100 |
| Collard Greens | May 13 | Jun 3 | Jun 17 | Aug 12 – Oct 14 | 55–75 |
| Corn | — | Jun 24 | — | Aug 26 – Oct 21 | 60–100 |
| Cowpeas | — | Jun 24 | — | Aug 26 – Oct 7 | 60–90 |
| Cress | May 13 | Jun 3 | Jun 17 | Jul 1 – Jul 22 | 14–21 |
| Crookneck Squash | May 13 | Jun 24 | Jul 1 | Aug 19 – Sep 16 | 45–60 |
| Crosne | — | Jun 3 | — | Nov 4 – Nov 18 | 150–200 |
| Cucumber | May 13 | Jun 24 | Jul 1 | Aug 26 – Oct 21 | 50–70 |
| Daikon | — | Jun 3 | — | Jul 29 – Aug 26 | 50–70 |
| Delicata Squash | May 13 | Jun 24 | Jul 1 | Sep 23 – Oct 28 | 80–100 |
| Edamame | — | Jun 24 | — | Sep 9 – Oct 21 | 75–100 |
| Eggplant | Apr 8 | Jun 24 | Jul 1 | Sep 9 – Nov 11 | 65–85 |
| Endive | May 13 | Jun 3 | Jun 17 | Aug 5 – Sep 9 | 45–65 |
| Escarole | May 13 | Jun 3 | Jun 17 | Aug 12 – Sep 9 | 50–70 |
| Fava Beans | May 13 | Jun 3 | Jun 17 | Sep 2 – Oct 14 | 75–100 |
| Fennel | Apr 22 | Jun 24 | Jul 1 | Sep 2 – Oct 14 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Jun 24 | — | Aug 19 – Oct 14 | 50–65 |
| Horseradish | — | — | Jul 1 | Nov 4 – Dec 16 | 120–180 |
| Hot Peppers | Apr 8 | Jun 24 | Jul 1 | Sep 9 – Dec 16 | 70–120 |
| Hubbard Squash | May 13 | Jun 24 | Jul 1 | Oct 14 – Nov 18 | 100–120 |
| Kabocha | May 13 | Jun 24 | Jul 1 | Sep 30 – Oct 28 | 85–100 |
| Kai Lan | May 13 | Jun 3 | Jun 17 | Aug 5 – Sep 2 | 45–60 |
| Kale | May 13 | Jun 3 | Jun 17 | Aug 12 – Oct 7 | 50–70 |
| Kidney Beans | — | Jun 24 | — | Sep 23 – Oct 28 | 85–110 |
| Kohlrabi | May 13 | Jun 3 | Jun 17 | Aug 5 – Sep 9 | 45–65 |
| Komatsuna | May 13 | Jun 3 | Jun 17 | Jul 22 – Aug 26 | 35–50 |
| Leeks | May 13 | Jun 3 | Jun 17 | Sep 16 – Dec 2 | 90–150 |
| Lentils | May 13 | Jun 3 | Jun 17 | Sep 9 – Oct 21 | 80–110 |
| Lettuce | May 13 | Jun 3 | Jun 17 | Jul 22 – Sep 30 | 30–60 |
| Lima Beans | — | Jun 24 | — | Aug 26 – Oct 7 | 60–90 |
| Mache | May 13 | Jun 3 | Jun 17 | Jul 29 – Sep 2 | 40–60 |
| Melon | May 13 | Jun 24 | Jul 1 | Sep 9 – Oct 28 | 70–100 |
| Microgreens | May 13 | Jun 3 | Jun 17 | Jun 24 – Jul 22 | 7–21 |
| Mitsuba | May 13 | Jun 3 | Jun 10 | Aug 5 – Sep 30 | 50–70 |
| Mizuna | May 13 | Jun 3 | Jun 17 | Jul 22 – Aug 19 | 30–45 |
| Mustard Greens | May 13 | Jun 3 | Jun 17 | Jul 22 – Sep 23 | 30–50 |
| Napa Cabbage | May 13 | Jun 3 | Jun 17 | Aug 12 – Sep 16 | 55–75 |
| New Zealand Spinach | Apr 22 | Jun 24 | Jul 1 | Aug 26 – Sep 23 | 55–70 |
| Okra | Apr 22 | Jun 24 | Jul 1 | Aug 26 – Oct 21 | 50–65 |
| Onion | May 13 | Jun 3 | Jun 17 | Sep 16 – Nov 4 | 90–120 |
| Pac Choi | May 13 | Jun 3 | Jun 17 | Jul 29 – Aug 26 | 40–55 |
| Parsnip | — | Jun 3 | — | Sep 16 – Oct 28 | 100–130 |
| Patty Pan Squash | May 13 | Jun 24 | Jul 1 | Aug 19 – Sep 16 | 45–60 |
| Peas | May 13 | Jun 3 | Jun 17 | Aug 12 – Oct 7 | 55–70 |
| Peppers | Apr 8 | Jun 24 | Jul 1 | Sep 2 – Nov 11 | 60–90 |
| Pole Beans | Apr 22 | Jun 24 | Jul 1 | Aug 26 – Oct 21 | 55–70 |
| Potatoes | Apr 22 | Jun 24 | Jul 1 | Sep 9 – Nov 18 | 70–120 |
| Pumpkin | May 13 | Jun 24 | Jul 1 | Sep 30 – Nov 18 | 85–120 |
| Purslane | May 13 | Jun 3 | Jun 17 | Jul 29 – Sep 2 | 40–60 |
| Radicchio | May 13 | Jun 3 | Jun 17 | Aug 19 – Sep 23 | 60–80 |
| Radish | — | Jun 3 | — | Jul 1 – Jul 22 | 22–35 |
| Rhubarb | — | — | Jul 8 | — | 365–730 |
| Romanesco | May 13 | Jun 3 | Jun 17 | Sep 2 – Oct 14 | 75–100 |
| Rutabaga | — | Jun 3 | — | Aug 26 – Sep 30 | 80–100 |
| Salsify | — | Jun 3 | — | Sep 16 – Oct 28 | 100–130 |
| Savoy Cabbage | May 13 | Jun 3 | Jun 17 | Aug 26 – Oct 21 | 70–110 |
| Scallions | May 13 | Jun 3 | Jun 17 | Aug 12 – Sep 9 | 50–70 |
| Scarlet Runner Beans | Apr 22 | Jun 24 | Jul 1 | Sep 2 – Oct 7 | 60–80 |
| Shallot | May 13 | Jun 3 | Jun 17 | Sep 16 – Nov 4 | 90–120 |
| Shiso | Apr 29 | Jun 24 | Jul 1 | Aug 26 – Oct 21 | 50–70 |
| Snap Peas | Apr 22 | Jun 24 | Jul 1 | Aug 26 – Oct 21 | 55–70 |
| Snow Peas | May 13 | Jun 3 | Jun 17 | Aug 12 – Oct 7 | 50–65 |
| Soybeans | — | Jun 24 | — | Sep 16 – Nov 11 | 80–120 |
| Spaghetti Squash | May 13 | Jun 24 | Jul 1 | Sep 30 – Oct 28 | 85–100 |
| Spinach | May 13 | Jun 3 | Jun 17 | Jul 22 – Sep 23 | 35–50 |
| Squash (Summer) | May 13 | Jun 24 | Jul 1 | Aug 19 – Oct 21 | 45–65 |
| Squash (Winter) | May 13 | Jun 24 | Jul 1 | Sep 23 – Nov 18 | 80–120 |
| Sunchoke | — | — | Jul 1 | Oct 21 – Dec 16 | 110–150 |
| Sunflower | Apr 22 | Jun 24 | Jul 1 | Sep 9 – Oct 28 | 70–100 |
| Sweet Corn | — | Jun 24 | — | Aug 26 – Oct 7 | 60–90 |
| Sweet Potatoes | Apr 22 | Jun 24 | Jul 1 | Sep 30 – Nov 18 | 90–120 |
| Tatsoi | May 13 | Jun 3 | Jun 17 | Jul 22 – Aug 26 | 35–50 |
| Tomatillo | Apr 22 | Jun 24 | Jul 1 | Sep 2 – Nov 11 | 60–85 |
| Tomatoes | Apr 22 | Jun 24 | Jul 1 | Sep 2 – Nov 11 | 60–85 |
| Turnip | — | Jun 3 | — | Jul 15 – Aug 19 | 40–60 |
| Watercress | May 13 | Jun 3 | Jun 17 | Jul 29 – Sep 2 | 40–60 |
| Watermelon | May 13 | Jun 24 | Jul 1 | Sep 9 – Oct 28 | 70–100 |
| Wax Beans | — | Jun 24 | — | Aug 19 – Oct 14 | 50–65 |
| Winter Melon | Apr 22 | Jun 24 | Jul 1 | Sep 30 – Nov 18 | 90–120 |
| Yard Long Beans | Apr 22 | Jun 24 | Jul 1 | Aug 26 – Oct 7 | 55–80 |
| Zucchini | May 13 | Jun 24 | Jul 1 | Aug 19 – Oct 14 | 45–60 |
🍓 Fruits to Grow in Harney County
27 fruits that grow well in Zone 5b with planting dates for Harney County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | Jul 8 | Oct 7 – Dec 23 | 90–180 |
| Aronia | — | — | Jul 8 | — | 730–1095 |
| Blackberries | — | — | Jul 8 | — | 365–730 |
| Blueberries | — | — | Jul 8 | — | 730–1095 |
| Boysenberries | — | — | Jul 8 | — | 365–730 |
| Cantaloupe | — | — | Jul 8 | Sep 16 – Oct 21 | 70–90 |
| Che Fruit | — | — | Jul 8 | — | 1095–1825 |
| Cranberries | — | — | Jul 8 | — | 730–1095 |
| Currants | — | — | Jul 8 | — | 730–1095 |
| Elderberries | — | — | Jul 8 | — | 730–1095 |
| Goji Berries | — | — | Jul 8 | — | 730–1095 |
| Gooseberries | — | — | Jul 8 | — | 730–1095 |
| Grapes | — | — | Jul 8 | — | 730–1095 |
| Ground Cherry | — | — | Jul 8 | Sep 16 – Nov 11 | 65–80 |
| Hardy Kiwi | — | — | Jul 8 | — | 1095–1825 |
| Haskaps | — | — | Jul 8 | — | 730–1095 |
| Honeydew | — | — | Jul 8 | Sep 30 – Nov 11 | 80–110 |
| Jostaberry | — | — | Jul 8 | — | 730–1095 |
| Lingonberries | — | — | Jul 8 | — | 730–1095 |
| Medlar | — | — | Jul 8 | — | 1095–1825 |
| Mulberries | — | — | Jul 8 | — | 730–1825 |
| Pawpaw | — | — | Jul 8 | — | 1095–2555 |
| Persimmon | — | — | Jul 8 | — | 1095–2555 |
| Quince | — | — | Jul 8 | — | 1095–1825 |
| Raspberries | — | — | Jul 8 | — | 365–730 |
| Serviceberries | — | — | Jul 8 | — | 730–1095 |
| Strawberries | — | — | Jul 8 | Oct 7 – Dec 23 | 90–365 |
🌿 Herbs to Grow in Harney County
37 herbs that grow well in Zone 5b with planting dates for Harney County.
Show all 37 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | May 13 | Jun 3 | Jun 10 | — | 365–730 |
| Anise | May 13 | Jun 3 | Jun 10 | Sep 9 – Nov 25 | 90–120 |
| Basil | Apr 29 | Jun 24 | Jul 1 | Aug 26 – Oct 28 | 50–75 |
| Bee Balm | — | — | Jun 24 | Sep 23 – Dec 9 | 90–120 |
| Borage | May 13 | Jun 3 | Jun 10 | Aug 5 – Sep 23 | 50–60 |
| Caraway | May 13 | Jun 3 | Jun 10 | — | 365–450 |
| Catnip | — | — | Jun 24 | Aug 26 – Oct 28 | 60–80 |
| Chamomile | May 13 | Jun 3 | Jun 10 | Aug 12 – Oct 21 | 60–90 |
| Chervil | May 13 | Jun 3 | Jun 10 | Jul 22 – Sep 23 | 40–60 |
| Chives | — | — | Jun 24 | Aug 26 – Nov 4 | 60–90 |
| Cilantro | May 13 | Jun 3 | Jun 10 | Jul 22 – Sep 23 | 40–60 |
| Comfrey | — | — | Jun 24 | Aug 26 – Nov 4 | 60–90 |
| Cumin | May 13 | Jun 3 | Jun 10 | Sep 23 – Nov 25 | 100–120 |
| Dill | May 13 | Jun 3 | Jun 10 | Jul 22 – Sep 23 | 40–60 |
| Echinacea | — | — | Jun 24 | Oct 28 – Dec 9 | 120–180 |
| Epazote | Apr 29 | Jun 24 | Jul 1 | Aug 19 – Oct 14 | 45–60 |
| Fennel (herb) | May 13 | Jun 3 | Jun 10 | Aug 12 – Oct 21 | 60–90 |
| Feverfew | — | — | Jun 24 | Sep 23 – Dec 9 | 90–120 |
| Garlic Chives | — | — | Jun 24 | Aug 26 – Nov 4 | 60–90 |
| Horehound | — | — | Jun 24 | Sep 9 – Nov 4 | 75–90 |
| Hyssop | — | — | Jun 24 | Sep 2 – Nov 4 | 70–90 |
| Lavender | — | — | Jun 24 | Sep 23 – Dec 9 | 90–200 |
| Lemon Balm | — | — | Jun 24 | Aug 26 – Oct 14 | 60–70 |
| Lemon Thyme | — | — | Jun 24 | Sep 2 – Nov 4 | 70–90 |
| Lovage | — | — | Jun 24 | Sep 2 – Nov 4 | 70–90 |
| Mint | — | — | Jun 24 | Aug 26 – Nov 4 | 60–90 |
| Oregano | — | — | Jun 24 | Aug 26 – Nov 4 | 60–90 |
| Parsley | May 13 | Jun 3 | Jun 10 | Aug 12 – Oct 14 | 60–80 |
| Rue | — | — | Jun 24 | Sep 2 – Nov 4 | 70–90 |
| Sage | — | — | Jun 24 | Sep 9 – Nov 4 | 75–90 |
| Savory | — | — | Jun 24 | Aug 19 – Oct 14 | 50–70 |
| Sorrel | May 13 | Jun 3 | Jun 10 | Jul 22 – Sep 23 | 40–60 |
| Tarragon | — | — | Jun 24 | Aug 26 – Nov 4 | 60–90 |
| Thai Basil | Apr 29 | Jun 24 | Jul 1 | Aug 26 – Oct 28 | 50–75 |
| Thyme | — | — | Jun 24 | Sep 2 – Nov 4 | 70–90 |
| Valerian | — | — | Jun 24 | Oct 28 – Dec 9 | 120–180 |
| Yarrow | — | — | Jun 24 | Sep 23 – Dec 9 | 90–120 |
Monthly Planting Guide for Harney County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Harney County.
Frequently Asked Questions
What planting zone is Harney County, OR?
Harney County is in USDA Hardiness Zone 5b. 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 Harney County, OR?
Based on 31 years of NOAA weather station data, the median last spring frost in Harney County falls around June 17. In 8 out of 10 years, last frost lands between May 29 and June 24 — a 25-day window of variability. Use June 24 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Harney County, OR?
The median first fall frost in Harney County arrives around September 6. In cold years it can arrive as early as August 13; in mild years as late as September 25. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Harney County?
Harney County has a frost-free growing season of approximately 81 days. Focus on short-season varieties and start warm-season crops indoors 6–8 weeks before last frost.
What is the soil like in Harney County for gardening?
Harney County has predominantly Silt Loam soil with a pH range of 5.6–6.4 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Harney County?
Harney County has commercial agriculture that includes Wheat, Hay, Apples, Potatoes, Berries. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Harney County a good location for home gardening?
Harney County scores 68/100 (Good) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. Conditions here are moderate — most common crops grow well with standard timing and care.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Harney County gardeners in Zone 5b organize planting dates, track what's growing, and never miss a planting window.
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