Hermiston, OR — Planting Guide for June
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June in the garden — Umatilla County, Oregon
Your garden in Umatilla County, Oregon is working on a schedule, even when you're not. Here's where you should be this June.
-
Start basil, peppers, and pole beans indoors
Label every cell. You will absolutely forget which is which otherwise.
-
Pick carrots, green beans, and kale
The more you pick, the more the plant produces. Letting fruit overripen tells the plant it's time to stop.
To set up a strong July, finish these tasks
- Starting indoors: begonias, geraniums, and hostas
- First harvests: basil, carrots, and cucumber
Hermiston gardens in a dry climate (only 8" annual precipitation). Watering strategy matters more here than in most of the country — drip irrigation, deep mulching, and morning watering aren't optional, they're table stakes. The flip side: pest and disease pressure are far lower than in humid regions, and your soil temperatures climb fast in spring so you can plant heat-lovers earlier than the zone map suggests.
Soils trend Silt Loam — the gold standard for vegetables. Add 2–3" of compost annually to maintain it and you'll outgrow most of your neighbors.
Hermiston averages 30.1 drought weeks per year (US Drought Monitor, 2000–present, trend stable). Treat irrigation as a year-round system, not a summer add-on.
🌡️ USDA Zone
7a (0°F to 5°F min)
❄️ Avg. Last Frost
April 23
🍂 Avg. First Frost
October 20
📅 Growing Season
180 days
🌧️ Climate
Arid 8.0" annual
💨 Wind
Moderate 7.2 mph avg
🥶 Frost Tier
Regular 0% frost-free years
🏜️ Drought
30.1 wk/yr trend stable
📍 ZIP Codes
1 ZIP
Monthly Watering Calendar for Hermiston
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
The practical takeaway: Plants need different amounts of water at different growth stages — heavy at flowering and fruit-set, lighter at establishment. Hermiston's 8" annual rainfall is your starting math; the timing tells you when natural rain will cover you and when you need to step in.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 1.8 in | 20 days | — | None |
| Feb | 1.8 in | 15 days | — | None |
| Mar | 1.3 in | 15 days | 3 in | High |
| Apr | 1.1 in | 12 days | 3.2 in | Critical |
| May | 0.9 in | 8 days | 3.4 in | Critical |
| Jun | 0.6 in | 6 days | 3.7 in | Critical |
| Jul | 0.3 in | 3 days | 4 in | Critical |
| Aug | 0.3 in | 3 days | 4 in | Critical |
| Sep | 0.6 in | 4 days | 3.7 in | Critical |
| Oct | 1.4 in | 11 days | 2.9 in | High |
| Nov | 2.4 in | 18 days | — | None |
| Dec | 2.1 in | 20 days | — | None |
Annual total: 14.6 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.
Hermiston Soil Profile
Soil Type
Silt Loam
Soil pH
5.2-6.8
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) | May 13 | Nov 8 | 179 days |
| Cautious | May 4 | Oct 27 | 176 days |
| Average year | Apr 23 | Oct 20 | 180 days |
| Optimistic | Apr 8 | Oct 9 | 184 days |
| Aggressive (risky) | Mar 19 | Sep 30 | 195 days |
Not very — frost dates can vary by ±55 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Yes — growing seasons are getting longer here (about 2 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Umatilla County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Umatilla 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 Umatilla County's climate and soil.
County Extension Office
Umatilla 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 Umatilla County
Finding local nurseries & garden centers in Umatilla County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Umatilla 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 Umatilla County OR" or "garden center Umatilla 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 Umatilla County OR" or check your extension office and local parks department. Facebook groups like "Umatilla 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.
Show 6 more succession options
Sunlight & Day Length in Hermiston
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Why it matters: Photoperiod-sensitive crops will fail spectacularly if planted at the wrong latitude. Sweet onions in Michigan? Tiny. Spanish onions in Florida? Tiny. Match variety to Hermiston's daylight pattern and you'll see the difference.
Longest Day
15.5 hours
Summer solstice daylight
Shortest Day
8.5 hours
Winter solstice daylight
Peak Sun Hours
10.6 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 | 8.9 hr | 2.1 hr | Short day |
| February | 10.1 hr | 3.1 hr | Short day |
| March | 11.6 hr | 4.3 hr | Short day |
| April | 13.3 hr | 5.6 hr | Neutral |
| May | 14.7 hr | 7.2 hr | Long day |
| June | 15.5 hr | 8.4 hr | Long day |
| July | 15.2 hr | 10.6 hr | Long day |
| August | 13.9 hr | 9.3 hr | Neutral |
| September | 12.3 hr | 7.4 hr | Neutral |
| October | 10.7 hr | 3.9 hr | Short day |
| November | 9.2 hr | 2.3 hr | Short day |
| December | 8.5 hr | 1.8 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting in Hermiston
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
For new gardeners: Most root crops germinate well at 50-60°F. Most fruit-bearing crops want 65-75°F. Hermiston's monthly soil curve maps these windows to actual months.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun 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 | 24°F | 35°F | ❄️ Dormant | ~36 weeks |
| Feb | 29°F | 33°F | ❄️ Dormant | ~36 weeks |
| Mar | 33°F | 37°F | ❄️ Dormant | ~36 weeks |
| Apr | 46°F | 45°F | 🐢 Slow | ~24 weeks |
| May | 60°F | 54°F | ♻️ Active | ~14 weeks |
| Jun | 69°F | 63°F | 🔥 Peak | ~8 weeks |
| Jul | 78°F | 72°F | 🔥 Peak | ~8 weeks |
| Aug | 78°F | 74°F | 🔥 Peak | ~8 weeks |
| Sep | 72°F | 68°F | 🔥 Peak | ~8 weeks |
| Oct | 60°F | 61°F | ♻️ Active | ~14 weeks |
| Nov | 45°F | 51°F | 🐢 Slow | ~24 weeks |
| Dec | 31°F | 41°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 Hermiston
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
The practical takeaway: Pest pressure is a function of climate, not effort. Hermiston's baseline tells you how much vigilance is normal. A bad pest year in low-pressure region = a normal year in high-pressure region.
Insect Pest Pressure
Moderate — common pests appear but manageable with monitoring.
Disease Risk
Low disease risk — dry conditions reduce fungal problems.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Apr, May, Jun, Jul, Aug, Sep |
| Japanese beetles | High | Jun, Jul, Aug |
| Squash vine borers | Moderate | Jun, Jul |
| Tomato hornworms | Moderate | Jun, Jul, Aug |
| Cucumber beetles | Low | May, Jun, Jul |
| Stink bugs | Low | Jun, Jul, Aug, Sep |
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 Hermiston
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
What this means for you: Why not just leave bare soil? Weed seeds, erosion, nutrient leaching, and crust formation. A cover crop solves all of these for the cost of seeds and one mowing.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 1 | Aug 11 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | Apr 30 | Aug 25 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 28 | Aug 25 | ✓ 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 | May 17 | Sep 22 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (7 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 22 | Apr 9 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 15 | Apr 9 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Aug 31 | Apr 9 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 5 | Apr 2 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 25 | Apr 9 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 15 | Apr 9 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 21 | Apr 2 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Hermiston
What this means for you: Wind dries soil, knocks over young transplants, and disrupts pollination for bees and butterflies. Hermiston averages 7.2 mph — above 10 mph means windbreaks (shrubs, fences, taller crops to windward), staked tomatoes from day one, and an extra round of watering during dry windy spells. Lower wind = lower water bills and fewer broken stems.
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 9 mph Summer: 9 mph
Fall: 10 mph Winter: 11 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
4.7/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (498 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting in Hermiston
How much water you can collect, when to collect it, and what size system you need for your garden.
Quick context: A 1,000 sq ft roof captures about 600 gallons from a single 1" rainfall. Hermiston gets 8" of rain a year — a couple of well-placed rain barrels can cover most summer watering. In dry climates the math's even better: every captured gallon is one you don't buy.
Annual Collection
7,276 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
8 rain barrels (55 gal each)
For a typical 500 sq ft garden. Serious collectors: consider a 2,000 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
May, 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 14.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 7,276 gallons annually
- Rainwater harvesting is fully legal in your state
- In your dry climate, every drop counts — consider a larger cistern system
- Position collection tanks in shade to reduce evaporation and algae growth
🥬 Vegetables to Grow in Hermiston
112 vegetables matched to Zone 7a with planting dates calibrated for Hermiston.
Show all 112 vegetables with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Mar 26 | Apr 30 | May 7 | — | Jul 30 – Sep 3 | 80–100 |
| Amaranth | Mar 5 | Apr 30 | May 7 | — | Aug 6 – Sep 24 | 90–120 |
| Artichoke | — | — | May 7 | — | Sep 10 – Nov 19 | 120–180 |
| Arugula | Mar 19 | Apr 9 | Apr 23 | Aug 11 | May 28 – Jul 30 | 30–50 |
| Asparagus | — | — | May 7 | — | — | 730–1095 |
| Beets | — | Apr 9 | — | Aug 11 | Jun 4 – Jul 2 | 50–70 |
| Belgian Endive | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Aug 13 – Oct 8 | 110–150 |
| Bitter Melon | Mar 5 | Apr 30 | May 7 | — | Jul 9 – Aug 20 | 60–90 |
| Black Beans | — | Apr 30 | — | — | Jul 30 – Sep 17 | 90–120 |
| Bok Choy | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 4 – Jul 9 | 40–60 |
| Broccoli | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 25 – Aug 6 | 60–90 |
| Broccoli Rabe | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 4 – Jul 9 | 40–60 |
| Brussels Sprouts | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 23 – Sep 17 | 90–130 |
| Butternut Squash | Mar 26 | Apr 30 | May 7 | — | Aug 6 – Sep 10 | 85–110 |
| Cabbage | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 25 – Aug 20 | 60–100 |
| Calabash | Mar 5 | Apr 30 | May 7 | — | Jul 30 – Sep 24 | 80–120 |
| Cardoon | — | — | May 7 | — | Sep 10 – Oct 22 | 120–150 |
| Carrots | — | Apr 9 | — | Aug 11 | Jun 11 – Jul 16 | 60–80 |
| Cauliflower | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Aug 20 | 55–100 |
| Celeriac | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Aug 6 – Sep 10 | 100–120 |
| Celery | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 16 – Sep 10 | 80–120 |
| Celtuce | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 25 – Aug 6 | 60–90 |
| Chard | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Aug 6 | 50–60 |
| Chayote | Mar 5 | Apr 30 | May 7 | — | Sep 10 – Nov 19 | 120–180 |
| Chickpeas | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 16 – Aug 27 | 80–110 |
| Chicory | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 25 – Aug 6 | 60–85 |
| Chinese Cabbage | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Jul 16 | 50–70 |
| Christmas Lima Beans | Mar 5 | Apr 30 | May 7 | — | Jul 30 – Sep 3 | 80–100 |
| Collard Greens | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Aug 20 | 55–75 |
| Corn | — | Apr 30 | — | — | Jul 2 – Aug 27 | 60–100 |
| Cowpeas | — | Apr 30 | — | — | Jul 2 – Aug 13 | 60–90 |
| Cress | Mar 19 | Apr 9 | Apr 23 | Aug 11 | May 7 – May 28 | 14–21 |
| Crookneck Squash | Mar 26 | Apr 30 | May 7 | — | Jun 25 – Jul 23 | 45–60 |
| Crosne | — | Apr 9 | — | Aug 11 | Sep 10 – Nov 12 | 150–200 |
| Cucumber | Mar 26 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 50–70 |
| Daikon | — | Apr 9 | — | Aug 11 | Jun 4 – Jul 2 | 50–70 |
| Delicata Squash | Mar 26 | Apr 30 | May 7 | — | Jul 30 – Sep 3 | 80–100 |
| Edamame | — | Apr 30 | — | — | Jul 16 – Aug 27 | 75–100 |
| Eggplant | Feb 19 | Apr 30 | May 7 | — | Jul 16 – Sep 17 | 65–85 |
| Endive | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 11 – Jul 16 | 45–65 |
| Escarole | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Jul 16 | 50–70 |
| Fava Beans | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 9 – Aug 20 | 75–100 |
| Fennel | Mar 5 | Apr 30 | May 7 | — | Jul 9 – Aug 20 | 60–90 |
| Garlic | — | — | — | Sep 8 | Dec 8 – Apr 20 | 90–240 |
| Green Beans | — | Apr 30 | — | — | Jun 25 – Aug 20 | 50–65 |
| Horseradish | — | — | May 7 | — | Sep 10 – Nov 19 | 120–180 |
| Hot Peppers | Feb 19 | Apr 30 | May 7 | — | Jul 16 – Oct 22 | 70–120 |
| Hubbard Squash | Mar 26 | Apr 30 | May 7 | — | Aug 20 – Sep 24 | 100–120 |
| Jicama | Mar 5 | Apr 30 | May 7 | — | Sep 10 – Nov 19 | 120–180 |
| Kabocha | Mar 26 | Apr 30 | May 7 | — | Aug 6 – Sep 3 | 85–100 |
| Kai Lan | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 11 – Jul 9 | 45–60 |
| Kale | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Aug 13 | 50–70 |
| Kidney Beans | — | Apr 30 | — | — | Jul 30 – Sep 3 | 85–110 |
| Kohlrabi | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 11 – Jul 16 | 45–65 |
| Komatsuna | Mar 19 | Apr 9 | Apr 23 | Aug 11 | May 28 – Jul 2 | 35–50 |
| Leeks | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 23 – Oct 8 | 90–150 |
| Lentils | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 16 – Aug 27 | 80–110 |
| Lettuce | Mar 19 | Apr 9 | Apr 23 | Aug 11 | May 28 – Aug 6 | 30–60 |
| Lima Beans | — | Apr 30 | — | — | Jul 2 – Aug 13 | 60–90 |
| Loofah | Mar 5 | Apr 30 | May 7 | — | Aug 20 – Oct 22 | 100–150 |
| Luffa | Mar 5 | Apr 30 | May 7 | — | Aug 6 – Oct 22 | 90–150 |
| Mache | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 4 – Jul 9 | 40–60 |
| Malabar Spinach | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Jul 30 | 55–70 |
| Melon | Mar 26 | Apr 30 | May 7 | — | Jul 16 – Sep 3 | 70–100 |
| Microgreens | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Apr 30 – May 28 | 7–21 |
| Mitsuba | Mar 19 | Apr 9 | Apr 16 | Aug 11 | Jun 11 – Aug 6 | 50–70 |
| Mizuna | Mar 19 | Apr 9 | Apr 23 | Aug 11 | May 28 – Jun 25 | 30–45 |
| Mustard Greens | Mar 19 | Apr 9 | Apr 23 | Aug 11 | May 28 – Jul 30 | 30–50 |
| Napa Cabbage | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Jul 23 | 55–75 |
| New Zealand Spinach | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Jul 30 | 55–70 |
| Okra | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 50–65 |
| Onion | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 23 – Sep 10 | 90–120 |
| Pac Choi | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 4 – Jul 2 | 40–55 |
| Parsnip | — | Apr 9 | — | Aug 11 | Jul 23 – Sep 3 | 100–130 |
| Patty Pan Squash | Mar 26 | Apr 30 | May 7 | — | Jun 25 – Jul 23 | 45–60 |
| Peas | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Aug 13 | 55–70 |
| Peppers | Feb 19 | Apr 30 | May 7 | — | Jul 9 – Sep 17 | 60–90 |
| Pole Beans | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 55–70 |
| Potatoes | Mar 5 | Apr 30 | May 7 | — | Jul 16 – Sep 24 | 70–120 |
| Pumpkin | Mar 26 | Apr 30 | May 7 | — | Aug 6 – Sep 24 | 85–120 |
| Purslane | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 4 – Jul 9 | 40–60 |
| Radicchio | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 25 – Jul 30 | 60–80 |
| Radish | — | Apr 9 | — | Aug 11 | May 7 – May 28 | 22–35 |
| Rhubarb | — | — | May 14 | — | — | 365–730 |
| Romanesco | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 9 – Aug 20 | 75–100 |
| Rutabaga | — | Apr 9 | — | Aug 11 | Jul 2 – Aug 6 | 80–100 |
| Salsify | — | Apr 9 | — | Aug 11 | Jul 23 – Sep 3 | 100–130 |
| Savoy Cabbage | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 2 – Aug 27 | 70–110 |
| Scallions | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Jul 16 | 50–70 |
| Scarlet Runner Beans | Mar 5 | Apr 30 | May 7 | — | Jul 9 – Aug 13 | 60–80 |
| Shallot | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jul 23 – Sep 10 | 90–120 |
| Shiso | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 50–70 |
| Snap Peas | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Aug 27 | 55–70 |
| Snow Peas | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 18 – Aug 13 | 50–65 |
| Soybeans | — | Apr 30 | — | — | Jul 23 – Sep 17 | 80–120 |
| Spaghetti Squash | Mar 26 | Apr 30 | May 7 | — | Aug 6 – Sep 3 | 85–100 |
| Spinach | Mar 19 | Apr 9 | Apr 23 | Aug 11 | May 28 – Jul 30 | 35–50 |
| Squash (Summer) | Mar 26 | Apr 30 | May 7 | — | Jun 25 – Aug 27 | 45–65 |
| Squash (Winter) | Mar 26 | Apr 30 | May 7 | — | Jul 30 – Sep 24 | 80–120 |
| Sunchoke | — | — | May 7 | — | Aug 27 – Oct 22 | 110–150 |
| Sweet Corn | — | Apr 30 | — | — | Jul 2 – Aug 13 | 60–90 |
| Sweet Potatoes | Mar 5 | Apr 30 | May 7 | — | Aug 6 – Sep 24 | 90–120 |
| Tatsoi | Mar 19 | Apr 9 | Apr 23 | Aug 11 | May 28 – Jul 2 | 35–50 |
| Tomatillo | Mar 5 | Apr 30 | May 7 | — | Jul 9 – Sep 17 | 60–85 |
| Tomatoes | Mar 5 | Apr 30 | May 7 | — | Jul 9 – Sep 17 | 60–85 |
| Turnip | — | Apr 9 | — | Aug 11 | May 21 – Jun 25 | 40–60 |
| Watercress | Mar 19 | Apr 9 | Apr 23 | Aug 11 | Jun 4 – Jul 9 | 40–60 |
| Watermelon | Mar 26 | Apr 30 | May 7 | — | Jul 16 – Sep 3 | 70–100 |
| Wax Beans | — | Apr 30 | — | — | Jun 25 – Aug 20 | 50–65 |
| Winter Melon | Mar 5 | Apr 30 | May 7 | — | Aug 6 – Sep 24 | 90–120 |
| Yard Long Beans | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Aug 13 | 55–80 |
| Zucchini | Mar 26 | Apr 30 | May 7 | — | Jun 25 – Aug 20 | 45–60 |
🍓 Fruits to Grow in Hermiston
31 fruits matched to Zone 7a with planting dates calibrated for Hermiston.
Show all 31 fruits with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 14 | — | Aug 13 – Nov 26 | 90–180 |
| Aronia | — | — | May 14 | — | — | 730–1095 |
| Blackberries | — | — | May 14 | — | — | 365–730 |
| Blueberries | — | — | May 14 | — | — | 730–1095 |
| Boysenberries | — | — | May 14 | — | — | 365–730 |
| Cantaloupe | — | — | May 14 | — | Jul 23 – Aug 27 | 70–90 |
| Che Fruit | — | — | May 14 | — | — | 1095–1825 |
| Cranberries | — | — | May 14 | — | — | 730–1095 |
| Currants | — | — | May 14 | — | — | 730–1095 |
| Elderberries | — | — | May 14 | — | — | 730–1095 |
| Figs | — | — | May 14 | — | — | 730–1825 |
| Goji Berries | — | — | May 14 | — | — | 730–1095 |
| Gooseberries | — | — | May 14 | — | — | 730–1095 |
| Grapes | — | — | May 14 | — | — | 730–1095 |
| Ground Cherry | — | — | May 14 | — | Jul 23 – Sep 17 | 65–80 |
| Hardy Kiwi | — | — | May 14 | — | — | 1095–1825 |
| Haskaps | — | — | May 14 | — | — | 730–1095 |
| Honeydew | — | — | May 14 | — | Aug 6 – Sep 17 | 80–110 |
| Jostaberry | — | — | May 14 | — | — | 730–1095 |
| Kiwi | — | — | May 14 | — | — | 1095–1825 |
| Lingonberries | — | — | May 14 | — | — | 730–1095 |
| Loquat | — | — | May 14 | — | — | 730–1825 |
| Medlar | — | — | May 14 | — | — | 1095–1825 |
| Mulberries | — | — | May 14 | — | — | 730–1825 |
| Pawpaw | — | — | May 14 | — | — | 1095–2555 |
| Persimmon | — | — | May 14 | — | — | 1095–2555 |
| Pomegranate | — | — | May 14 | — | — | 730–1095 |
| Quince | — | — | May 14 | — | — | 1095–1825 |
| Raspberries | — | — | May 14 | — | — | 365–730 |
| Serviceberries | — | — | May 14 | — | — | 730–1095 |
| Strawberries | — | — | May 14 | — | Aug 13 – Dec 24 | 90–365 |
🌿 Herbs to Grow in Hermiston
36 herbs matched to Zone 7a with planting dates calibrated for Hermiston.
Show all 36 herbs with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Mar 19 | Apr 9 | Apr 16 | Aug 11 | — | 365–730 |
| Anise | Mar 19 | Apr 9 | Apr 16 | Aug 11 | Jul 16 – Oct 1 | 90–120 |
| Basil | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Sep 3 | 50–75 |
| Bee Balm | — | — | Apr 30 | — | Jul 30 – Oct 15 | 90–120 |
| Borage | Mar 19 | Apr 9 | Apr 16 | Aug 11 | Jun 11 – Jul 30 | 50–60 |
| Caraway | Mar 19 | Apr 9 | Apr 16 | Aug 11 | — | 365–450 |
| Catnip | — | — | Apr 30 | — | Jul 2 – Sep 3 | 60–80 |
| Chamomile | Mar 19 | Apr 9 | Apr 16 | Aug 11 | Jun 18 – Aug 27 | 60–90 |
| Chervil | Mar 19 | Apr 9 | Apr 16 | Aug 11 | May 28 – Jul 30 | 40–60 |
| Chives | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Cilantro | Mar 19 | Apr 9 | Apr 16 | Aug 11 | May 28 – Jul 30 | 40–60 |
| Comfrey | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Cumin | Mar 19 | Apr 9 | Apr 16 | Aug 11 | Jul 30 – Oct 1 | 100–120 |
| Dill | Mar 19 | Apr 9 | Apr 16 | Aug 11 | May 28 – Jul 30 | 40–60 |
| Epazote | Mar 5 | Apr 30 | May 7 | — | Jun 25 – Aug 20 | 45–60 |
| Fennel (herb) | Mar 19 | Apr 9 | Apr 16 | Aug 11 | Jun 18 – Aug 27 | 60–90 |
| Feverfew | — | — | Apr 30 | — | Jul 30 – Oct 15 | 90–120 |
| Garlic Chives | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Horehound | — | — | Apr 30 | — | Jul 16 – Sep 10 | 75–90 |
| Hyssop | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Lemon Balm | — | — | Apr 30 | — | Jul 2 – Aug 20 | 60–70 |
| Lemon Thyme | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Lovage | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Marjoram | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Mint | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Oregano | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Parsley | Mar 19 | Apr 9 | Apr 16 | Aug 11 | Jun 18 – Aug 20 | 60–80 |
| Rosemary | — | — | Apr 30 | — | Jul 23 – Dec 10 | 80–180 |
| Rue | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Sage | — | — | Apr 30 | — | Jul 16 – Sep 10 | 75–90 |
| Savory | — | — | Apr 30 | — | Jun 25 – Aug 20 | 50–70 |
| Sorrel | Mar 19 | Apr 9 | Apr 16 | Aug 11 | May 28 – Jul 30 | 40–60 |
| Tarragon | — | — | Apr 30 | — | Jul 2 – Sep 10 | 60–90 |
| Thai Basil | Mar 5 | Apr 30 | May 7 | — | Jul 2 – Sep 3 | 50–75 |
| Thyme | — | — | Apr 30 | — | Jul 9 – Sep 10 | 70–90 |
| Valerian | — | — | Apr 30 | — | Sep 3 – Dec 10 | 120–180 |
🌸 Flowers to Grow in Hermiston
53 flowers matched to Zone 7a with planting dates calibrated for Hermiston.
Show all 53 flowers with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 12 | Apr 23 | Apr 23 | — | Jun 18 – Oct 8 | 60–75 |
| Alliums | — | — | — | Sep 15 | Oct 13 – Nov 3 | 28–42 |
| Anemones | — | — | — | Aug 25 | Sep 8 – Oct 6 | 90–120 |
| Astilbe | Feb 19 | — | Apr 30 | — | Jul 9 – Sep 3 | 70–100 |
| Bachelor's Button | Mar 12 | Mar 19 | Apr 23 | Aug 25 | Jun 25 – Sep 24 | 60–90 |
| Begonias | Feb 12 | — | Apr 23 | — | Jul 2 – Oct 22 | 70–90 |
| Black-eyed Susan | Feb 19 | Apr 23 | Apr 30 | — | Jul 9 – Nov 12 | 60–80 |
| Bleeding Hearts | Feb 19 | — | Apr 30 | — | Jun 18 – Jul 23 | 60–90 |
| Calendula | Mar 12 | Mar 19 | Apr 23 | Aug 25 | Jun 11 – Sep 24 | 50–70 |
| California Poppy | — | Mar 26 | — | Aug 25 | Jun 4 – Aug 13 | 60–90 |
| Celosia | Mar 26 | Apr 23 | Apr 23 | — | Jun 25 – Oct 22 | 60–90 |
| Columbine | Feb 26 | Apr 30 | Apr 30 | — | Jun 18 – Jul 23 | 70–100 |
| Coreopsis | Feb 19 | Apr 23 | Apr 30 | — | Jul 2 – Nov 12 | 60–80 |
| Cosmos | Mar 26 | Apr 23 | Apr 23 | — | Jul 2 – Oct 22 | 60–90 |
| Crocus | — | — | — | Sep 15 | Aug 11 – Sep 1 | 10–20 |
| Daffodils | — | — | — | Sep 15 | Aug 18 – Sep 8 | 20–40 |
| Dahlias | Mar 26 | Apr 30 | Apr 30 | — | Jul 9 – Nov 12 | 70–120 |
| Daylily | Feb 19 | — | Apr 30 | — | Jul 9 – Nov 12 | 60–90 |
| Dianthus | Feb 26 | Mar 19 | Apr 2 | — | May 21 – Aug 20 | 60–80 |
| Echinacea (Purple Coneflower) | Feb 19 | Apr 30 | Apr 30 | — | Jul 16 – Nov 12 | 70–90 |
| Foxglove | Feb 26 | Apr 30 | Apr 30 | — | Jun 18 – Jul 23 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 5 | Apr 30 | Apr 30 | — | Jul 9 – Nov 26 | 70–100 |
| Geraniums | Feb 12 | — | Apr 23 | — | Jul 2 – Oct 22 | 70–100 |
| Gladiolus | — | Apr 23 | Apr 23 | — | Jul 2 – Nov 5 | 70–100 |
| Hostas | Feb 12 | — | Apr 30 | — | Jul 9 – Nov 12 | 60–90 |
| Hyacinths | — | — | — | Sep 15 | Sep 8 – Sep 29 | 14–28 |
| Hydrangeas | Feb 12 | — | Apr 30 | — | Jul 9 – Oct 29 | 90–150 |
| Impatiens | Feb 26 | — | Apr 30 | — | Jul 9 – Oct 29 | 60–75 |
| Irises | — | Division | Apr 30 | — | Jun 18 – Jul 23 | 60–100 |
| Larkspur | — | Mar 26 | — | Aug 11 | Jun 4 – Aug 13 | 60–90 |
| Lavender | Feb 19 | — | May 7 | — | Jul 16 – Sep 24 | 90–120 |
| Lilies | — | Division | Apr 30 | — | Jul 9 – Oct 29 | 70–120 |
| Lobelia | Feb 19 | — | Apr 2 | — | May 28 – Aug 20 | 70–80 |
| Lupine | Feb 26 | Apr 30 | Apr 30 | — | Jun 18 – Jul 23 | 75–100 |
| Marigolds | Mar 12 | Apr 23 | Apr 23 | — | Jun 18 – Sep 24 | 50–70 |
| Nasturtium | Mar 26 | Apr 23 | Apr 23 | — | Jun 18 – Oct 22 | 55–65 |
| Pansy | Feb 12 | — | Apr 23 | Aug 11 | Jun 18 – Aug 27 | 70–90 |
| Peonies | — | Division | Apr 30 | — | Jun 25 – Jul 30 | 90–120 |
| Petunia | Feb 26 | — | Apr 30 | — | Jul 9 – Oct 29 | 70–90 |
| Phlox | Feb 19 | Apr 30 | Apr 30 | — | Jul 9 – Oct 1 | 80–110 |
| Portulaca | Mar 26 | Apr 23 | Apr 23 | — | Jun 11 – Oct 8 | 50–70 |
| Ranunculus | — | — | — | Aug 25 | Sep 22 – Oct 20 | 90–120 |
| Roses | Feb 12 | — | Apr 30 | — | Jul 9 – Nov 12 | 90–180 |
| Salvia | Feb 26 | — | Apr 23 | — | Jul 2 – Oct 22 | 70–90 |
| Sedum (Stonecrop) | Feb 19 | — | Apr 30 | — | Aug 20 – Nov 12 | 60–90 |
| Snapdragon | Feb 12 | Mar 26 | Apr 23 | Aug 25 | Jul 2 – Sep 24 | 70–100 |
| Sunflower | Apr 2 | Apr 23 | Apr 23 | — | Jul 16 – Oct 22 | 70–100 |
| Sweet Alyssum | Mar 12 | Mar 26 | Apr 23 | Sep 8 | Jun 4 – Aug 27 | 45–60 |
| Sweet Pea | — | Mar 19 | — | Aug 25 | May 28 – Aug 20 | 65–85 |
| Tulips | — | — | — | Sep 15 | Sep 1 – Sep 22 | 15–30 |
| Vinca (Annual) | Feb 12 | — | Apr 23 | — | Jul 2 – Oct 22 | 70–90 |
| Yarrow | Feb 19 | Apr 23 | Apr 30 | — | Jul 2 – Nov 12 | 60–90 |
| Zinnia | Mar 26 | Apr 23 | Apr 23 | — | Jul 2 – Oct 22 | 60–70 |
Monthly Planting Guide for Hermiston
ZIP Codes in Hermiston
Click any ZIP to see its specific frost, soil, and climate measurements (some ZIPs differ noticeably from the town aggregate):
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Umatilla County.
Your Umatilla County Garden Planner — Free
A 22-page printable planner built for Umatilla 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