Linn County, OR — Planting Guide
Linn County is in USDA Zone 8a. The average last spring frost is April 22 and the first fall frost is October 25, giving you a growing season of approximately 186 days.
At an elevation of 259 ft, Linn County receives approximately 37.2 in of rainfall annually. Summer highs average 81°F with winter lows around 44°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 50 days year to year — ranging from March 25 in warm years to May 15 in cold years. The growing season is trending longer by about 3.62 days per decade. Linn County scores 61/100 (Good) on the Microclimate Index.
🌡️ Zone
8a (10°F to 15°F min)
❄️ Last Frost
April 22
🍂 First Frost
October 25
📅 Growing Season
186 days
⛰️ Elevation
259 ft
🌧️ Annual Rainfall
37.2 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 | 5.8 in | 16 days | — | None |
| Feb | 3.8 in | 16 days | 0.5 in | Low |
| Mar | 4.2 in | 17 days | 0.1 in | Low |
| Apr | 2.7 in | 11 days | 1.6 in | High |
| May | 2 in | 8 days | 2.3 in | High |
| Jun | 1.4 in | 7 days | 2.9 in | High |
| Jul | 0.6 in | 3 days | 3.7 in | Critical |
| Aug | 0.6 in | 2 days | 3.7 in | Critical |
| Sep | 1.4 in | 4 days | 2.9 in | High |
| Oct | 3.5 in | 9 days | 0.8 in | Moderate |
| Nov | 5.4 in | 15 days | — | Low |
| Dec | 5.9 in | 19 days | — | None |
Annual total: 37.3 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.
Linn County Soil Profile
Soil Type
Silt Loam
Soil pH
5.6-6.3
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 15 | Nov 20 | 189 days |
| Cautious | May 1 | Nov 3 | 186 days |
| Average year | Apr 22 | Oct 25 | 186 days |
| Optimistic | Apr 15 | Oct 17 | 185 days |
| Aggressive (risky) | Mar 25 | Oct 5 | 194 days |
Not very — frost dates can vary by ±50 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 3.6 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Linn County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Linn 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 Linn County's climate and soil.
County Extension Office
Linn 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 Linn County
Finding local nurseries & garden centers in Linn County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Linn 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 Linn County OR" or "garden center Linn 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 Linn County OR" or check your extension office and local parks department. Facebook groups like "Linn 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
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Longest Day
15.3 hours
Summer solstice daylight
Shortest Day
8.7 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 hr | 2.3 hr | Short day |
| February | 10.2 hr | 3 hr | Short day |
| March | 11.6 hr | 3.9 hr | Short day |
| April | 13.2 hr | 5.7 hr | Neutral |
| May | 14.6 hr | 7.5 hr | Long day |
| June | 15.3 hr | 8.6 hr | Long day |
| July | 15 hr | 10.3 hr | Long day |
| August | 13.9 hr | 9 hr | Neutral |
| September | 12.3 hr | 6.9 hr | Neutral |
| October | 10.7 hr | 3.9 hr | Short day |
| November | 9.3 hr | 2.2 hr | Short day |
| December | 8.7 hr | 1.9 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 Apr through Oct.
Best Month to Compost
May
Microbial activity peaks when soil is warm.
Active Composting
9 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 44°F | 50°F | 🐢 Slow | ~24 weeks |
| Feb | 43°F | 51°F | 🐢 Slow | ~24 weeks |
| Mar | 52°F | 55°F | ♻️ Active | ~14 weeks |
| Apr | 60°F | 59°F | ♻️ Active | ~14 weeks |
| May | 69°F | 67°F | 🔥 Peak | ~8 weeks |
| Jun | 79°F | 77°F | 🔥 Peak | ~8 weeks |
| Jul | 87°F | 84°F | 🔥 Peak | ~8 weeks |
| Aug | 88°F | 84°F | 🔥 Peak | ~8 weeks |
| Sep | 83°F | 82°F | 🔥 Peak | ~8 weeks |
| Oct | 73°F | 73°F | 🔥 Peak | ~8 weeks |
| Nov | 59°F | 64°F | ♻️ Active | ~14 weeks |
| Dec | 48°F | 57°F | 🐢 Slow | ~24 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Linn 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
High fungal/bacterial risk. Space plants for airflow, water at soil level.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov |
| Squash vine borers | High | May, Jun, Jul |
| Stink bugs | High | Apr, May, Jun, Jul, Aug, Sep, Oct |
| Whiteflies | High | May, Jun, Jul, Aug, Sep, Oct |
| Spider mites | Moderate | Jun, Jul, Aug, Sep |
| Fire ants | Low | Mar, Apr, May, Jun, Jul, Aug, Sep, Oct |
Organic pest management tips
- Install physical barriers: floating row covers, copper tape for slugs, mesh netting
- Apply Bt (Bacillus thuringiensis) for caterpillar control — safe for beneficial insects
- Use kaolin clay spray to deter a wide range of insects on fruiting crops
- Release beneficial insects: ladybugs for aphids, parasitic wasps for caterpillars
- Apply neem oil weekly during high-pressure months
- Mulch heavily (3-4 inches) to reduce soil-borne disease splash
Cover Crops for Linn County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 23 | Aug 16 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Apr 28 | Aug 16 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Apr 27 | Aug 30 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 24 | Aug 30 | ✓ 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 8 | Oct 11 | — | 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 31 | Apr 8 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Sep 1 | Apr 8 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 10 | Apr 1 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 19 | Apr 8 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 25 | Apr 8 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 31 | Apr 8 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 25 | Apr 8 | — | 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: 12 mph Summer: 9 mph
Fall: 8 mph Winter: 14 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.3/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (821 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
18,590 gal
Per 1,000 sq ft of roof area (at 80% collection efficiency)
Recommended Setup
6 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, Mar, Nov, Dec
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jul, Aug
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 37.3 inches of rain per year
- A 1,000 sq ft roof can collect roughly 18,590 gallons annually
- Rainwater harvesting is fully legal in your state
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Linn County
Soil Type
Silt Loam
Soil pH 5.6–6.3 · Well Drained drainage
Native soil is well-suited to most vegetables and herbs with regular compost additions.
Watering Needs
Drought stress: 3.5/10
Low-to-moderate drought stress. Plan to water 1–2 times per week during peak summer. (37.2 in. annual rainfall)
Season Tips
186-day frost-free season
Plenty of time for warm-season crops. Start heat-lovers indoors 6–8 weeks before last frost to maximise your harvest window.
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 Linn County
115 vegetables that grow well in Zone 8a with planting dates for Linn County.
Show all 115 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 25 | Apr 29 | May 6 | Jul 29 – Sep 2 | 80–100 |
| Amaranth | Mar 4 | Apr 29 | May 6 | Aug 5 – Sep 23 | 90–120 |
| Artichoke | — | — | May 6 | Sep 9 – Nov 18 | 120–180 |
| Arugula | Mar 18 | Apr 8 | Apr 22 | May 27 – Jul 29 | 30–50 |
| Asparagus | — | — | May 6 | — | 730–1095 |
| Beets | — | Apr 8 | — | Jun 3 – Jul 1 | 50–70 |
| Belgian Endive | Mar 18 | Apr 8 | Apr 22 | Aug 12 – Oct 7 | 110–150 |
| Bitter Melon | Mar 4 | Apr 29 | May 6 | Jul 8 – Aug 19 | 60–90 |
| Black Beans | — | Apr 29 | — | Jul 29 – Sep 16 | 90–120 |
| Bok Choy | Mar 18 | Apr 8 | Apr 22 | Jun 3 – Jul 8 | 40–60 |
| Broccoli | Mar 18 | Apr 8 | Apr 22 | Jun 24 – Aug 5 | 60–90 |
| Broccoli Rabe | Mar 18 | Apr 8 | Apr 22 | Jun 3 – Jul 8 | 40–60 |
| Brussels Sprouts | Mar 18 | Apr 8 | Apr 22 | Jul 22 – Sep 16 | 90–130 |
| Butternut Squash | Mar 25 | Apr 29 | May 6 | Aug 5 – Sep 9 | 85–110 |
| Cabbage | Mar 18 | Apr 8 | Apr 22 | Jun 24 – Aug 19 | 60–100 |
| Calabash | Mar 4 | Apr 29 | May 6 | Jul 29 – Sep 23 | 80–120 |
| Cardoon | — | — | May 6 | Sep 9 – Oct 21 | 120–150 |
| Carrots | — | Apr 8 | — | Jun 10 – Jul 15 | 60–80 |
| Cauliflower | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Aug 19 | 55–100 |
| Celeriac | Mar 18 | Apr 8 | Apr 22 | Aug 5 – Sep 9 | 100–120 |
| Celery | Mar 18 | Apr 8 | Apr 22 | Jul 15 – Sep 9 | 80–120 |
| Celtuce | Mar 18 | Apr 8 | Apr 22 | Jun 24 – Aug 5 | 60–90 |
| Chard | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Aug 5 | 50–60 |
| Chayote | Mar 4 | Apr 29 | May 6 | Sep 9 – Nov 18 | 120–180 |
| Chickpeas | Mar 18 | Apr 8 | Apr 22 | Jul 15 – Aug 26 | 80–110 |
| Chicory | Mar 18 | Apr 8 | Apr 22 | Jun 24 – Aug 5 | 60–85 |
| Chinese Cabbage | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Jul 15 | 50–70 |
| Christmas Lima Beans | Mar 4 | Apr 29 | May 6 | Jul 29 – Sep 2 | 80–100 |
| Collard Greens | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Aug 19 | 55–75 |
| Corn | — | Apr 29 | — | Jul 1 – Aug 26 | 60–100 |
| Cowpeas | — | Apr 29 | — | Jul 1 – Aug 12 | 60–90 |
| Cress | Mar 18 | Apr 8 | Apr 22 | May 6 – May 27 | 14–21 |
| Crookneck Squash | Mar 25 | Apr 29 | May 6 | Jun 24 – Jul 22 | 45–60 |
| Crosne | — | Apr 8 | — | Sep 9 – Nov 11 | 150–200 |
| Cucumber | Mar 25 | Apr 29 | May 6 | Jul 1 – Aug 26 | 50–70 |
| Daikon | — | Apr 8 | — | Jun 3 – Jul 1 | 50–70 |
| Delicata Squash | Mar 25 | Apr 29 | May 6 | Jul 29 – Sep 2 | 80–100 |
| Edamame | — | Apr 29 | — | Jul 15 – Aug 26 | 75–100 |
| Eggplant | Feb 18 | Apr 29 | May 6 | Jul 15 – Sep 16 | 65–85 |
| Endive | Mar 18 | Apr 8 | Apr 22 | Jun 10 – Jul 15 | 45–65 |
| Escarole | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Jul 15 | 50–70 |
| Fava Beans | Mar 18 | Apr 8 | Apr 22 | Jul 8 – Aug 19 | 75–100 |
| Fennel | Mar 4 | Apr 29 | May 6 | Jul 8 – Aug 19 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Ginger | Mar 4 | Apr 29 | May 6 | Jan 6 – Jan 20 | 240–300 |
| Green Beans | — | Apr 29 | — | Jun 24 – Aug 19 | 50–65 |
| Horseradish | — | — | May 6 | Sep 9 – Nov 18 | 120–180 |
| Hot Peppers | Feb 18 | Apr 29 | May 6 | Jul 15 – Oct 21 | 70–120 |
| Hubbard Squash | Mar 25 | Apr 29 | May 6 | Aug 19 – Sep 23 | 100–120 |
| Jicama | Mar 4 | Apr 29 | May 6 | Sep 9 – Nov 18 | 120–180 |
| Kabocha | Mar 25 | Apr 29 | May 6 | Aug 5 – Sep 2 | 85–100 |
| Kai Lan | Mar 18 | Apr 8 | Apr 22 | Jun 10 – Jul 8 | 45–60 |
| Kale | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Aug 12 | 50–70 |
| Kidney Beans | — | Apr 29 | — | Jul 29 – Sep 2 | 85–110 |
| Kohlrabi | Mar 18 | Apr 8 | Apr 22 | Jun 10 – Jul 15 | 45–65 |
| Komatsuna | Mar 18 | Apr 8 | Apr 22 | May 27 – Jul 1 | 35–50 |
| Leeks | Mar 18 | Apr 8 | Apr 22 | Jul 22 – Oct 7 | 90–150 |
| Lentils | Mar 18 | Apr 8 | Apr 22 | Jul 15 – Aug 26 | 80–110 |
| Lettuce | Mar 18 | Apr 8 | Apr 22 | May 27 – Aug 5 | 30–60 |
| Lima Beans | — | Apr 29 | — | Jul 1 – Aug 12 | 60–90 |
| Loofah | Mar 4 | Apr 29 | May 6 | Aug 19 – Oct 21 | 100–150 |
| Luffa | Mar 4 | Apr 29 | May 6 | Aug 5 – Oct 21 | 90–150 |
| Mache | Mar 18 | Apr 8 | Apr 22 | Jun 3 – Jul 8 | 40–60 |
| Malabar Spinach | Mar 4 | Apr 29 | May 6 | Jul 1 – Jul 29 | 55–70 |
| Melon | Mar 25 | Apr 29 | May 6 | Jul 15 – Sep 2 | 70–100 |
| Microgreens | Mar 18 | Apr 8 | Apr 22 | Apr 29 – May 27 | 7–21 |
| Mitsuba | Mar 18 | Apr 8 | Apr 15 | Jun 10 – Aug 5 | 50–70 |
| Mizuna | Mar 18 | Apr 8 | Apr 22 | May 27 – Jun 24 | 30–45 |
| Mustard Greens | Mar 18 | Apr 8 | Apr 22 | May 27 – Jul 29 | 30–50 |
| Napa Cabbage | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Jul 22 | 55–75 |
| New Zealand Spinach | Mar 4 | Apr 29 | May 6 | Jul 1 – Jul 29 | 55–70 |
| Okra | Mar 4 | Apr 29 | May 6 | Jul 1 – Aug 26 | 50–65 |
| Onion | Mar 18 | Apr 8 | Apr 22 | Jul 22 – Sep 9 | 90–120 |
| Pac Choi | Mar 18 | Apr 8 | Apr 22 | Jun 3 – Jul 1 | 40–55 |
| Parsnip | — | Apr 8 | — | Jul 22 – Sep 2 | 100–130 |
| Patty Pan Squash | Mar 25 | Apr 29 | May 6 | Jun 24 – Jul 22 | 45–60 |
| Peas | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Aug 12 | 55–70 |
| Peppers | Feb 18 | Apr 29 | May 6 | Jul 8 – Sep 16 | 60–90 |
| Pole Beans | Mar 4 | Apr 29 | May 6 | Jul 1 – Aug 26 | 55–70 |
| Potatoes | Mar 4 | Apr 29 | May 6 | Jul 15 – Sep 23 | 70–120 |
| Pumpkin | Mar 25 | Apr 29 | May 6 | Aug 5 – Sep 23 | 85–120 |
| Purslane | Mar 18 | Apr 8 | Apr 22 | Jun 3 – Jul 8 | 40–60 |
| Radicchio | Mar 18 | Apr 8 | Apr 22 | Jun 24 – Jul 29 | 60–80 |
| Radish | — | Apr 8 | — | May 6 – May 27 | 22–35 |
| Rhubarb | — | — | May 13 | — | 365–730 |
| Romanesco | Mar 18 | Apr 8 | Apr 22 | Jul 8 – Aug 19 | 75–100 |
| Rutabaga | — | Apr 8 | — | Jul 1 – Aug 5 | 80–100 |
| Salsify | — | Apr 8 | — | Jul 22 – Sep 2 | 100–130 |
| Savoy Cabbage | Mar 18 | Apr 8 | Apr 22 | Jul 1 – Aug 26 | 70–110 |
| Scallions | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Jul 15 | 50–70 |
| Scarlet Runner Beans | Mar 4 | Apr 29 | May 6 | Jul 8 – Aug 12 | 60–80 |
| Shallot | Mar 18 | Apr 8 | Apr 22 | Jul 22 – Sep 9 | 90–120 |
| Shiso | Mar 4 | Apr 29 | May 6 | Jul 1 – Aug 26 | 50–70 |
| Snap Peas | Mar 4 | Apr 29 | May 6 | Jul 1 – Aug 26 | 55–70 |
| Snow Peas | Mar 18 | Apr 8 | Apr 22 | Jun 17 – Aug 12 | 50–65 |
| Soybeans | — | Apr 29 | — | Jul 22 – Sep 16 | 80–120 |
| Spaghetti Squash | Mar 25 | Apr 29 | May 6 | Aug 5 – Sep 2 | 85–100 |
| Spinach | Mar 18 | Apr 8 | Apr 22 | May 27 – Jul 29 | 35–50 |
| Squash (Summer) | Mar 25 | Apr 29 | May 6 | Jun 24 – Aug 26 | 45–65 |
| Squash (Winter) | Mar 25 | Apr 29 | May 6 | Jul 29 – Sep 23 | 80–120 |
| Sunchoke | — | — | May 6 | Aug 26 – Oct 21 | 110–150 |
| Sunflower | Mar 4 | Apr 29 | May 6 | Jul 15 – Sep 2 | 70–100 |
| Sweet Corn | — | Apr 29 | — | Jul 1 – Aug 12 | 60–90 |
| Sweet Potatoes | Mar 4 | Apr 29 | May 6 | Aug 5 – Sep 23 | 90–120 |
| Tatsoi | Mar 18 | Apr 8 | Apr 22 | May 27 – Jul 1 | 35–50 |
| Tomatillo | Mar 4 | Apr 29 | May 6 | Jul 8 – Sep 16 | 60–85 |
| Tomatoes | Mar 4 | Apr 29 | May 6 | Jul 8 – Sep 16 | 60–85 |
| Turmeric | Mar 4 | Apr 29 | May 6 | Jan 6 – Jan 20 | 240–300 |
| Turnip | — | Apr 8 | — | May 20 – Jun 24 | 40–60 |
| Watercress | Mar 18 | Apr 8 | Apr 22 | Jun 3 – Jul 8 | 40–60 |
| Watermelon | Mar 25 | Apr 29 | May 6 | Jul 15 – Sep 2 | 70–100 |
| Wax Beans | — | Apr 29 | — | Jun 24 – Aug 19 | 50–65 |
| Winter Melon | Mar 4 | Apr 29 | May 6 | Aug 5 – Sep 23 | 90–120 |
| Yard Long Beans | Mar 4 | Apr 29 | May 6 | Jul 1 – Aug 12 | 55–80 |
| Zucchini | Mar 25 | Apr 29 | May 6 | Jun 24 – Aug 19 | 45–60 |
🍓 Fruits to Grow in Linn County
27 fruits that grow well in Zone 8a with planting dates for Linn County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 13 | Aug 12 – Nov 25 | 90–180 |
| Aronia | — | — | May 13 | — | 730–1095 |
| Blackberries | — | — | May 13 | — | 365–730 |
| Blueberries | — | — | May 13 | — | 730–1095 |
| Boysenberries | — | — | May 13 | — | 365–730 |
| Cantaloupe | — | — | May 13 | Jul 22 – Aug 26 | 70–90 |
| Che Fruit | — | — | May 13 | — | 1095–1825 |
| Elderberries | — | — | May 13 | — | 730–1095 |
| Figs | — | — | May 13 | — | 730–1825 |
| Goji Berries | — | — | May 13 | — | 730–1095 |
| Gooseberries | — | — | May 13 | — | 730–1095 |
| Grapes | — | — | May 13 | — | 730–1095 |
| Ground Cherry | — | — | May 13 | Jul 22 – Sep 16 | 65–80 |
| Hardy Kiwi | — | — | May 13 | — | 1095–1825 |
| Honeydew | — | — | May 13 | Aug 5 – Sep 16 | 80–110 |
| Jostaberry | — | — | May 13 | — | 730–1095 |
| Kiwi | — | — | May 13 | — | 1095–1825 |
| Loquat | — | — | May 13 | — | 730–1825 |
| Medlar | — | — | May 13 | — | 1095–1825 |
| Mulberries | — | — | May 13 | — | 730–1825 |
| Pawpaw | — | — | May 13 | — | 1095–2555 |
| Persimmon | — | — | May 13 | — | 1095–2555 |
| Pomegranate | — | — | May 13 | — | 730–1095 |
| Quince | — | — | May 13 | — | 1095–1825 |
| Raspberries | — | — | May 13 | — | 365–730 |
| Serviceberries | — | — | May 13 | — | 730–1095 |
| Strawberries | — | — | May 13 | Aug 12 – Jan 27 | 90–365 |
🌿 Herbs to Grow in Linn County
42 herbs that grow well in Zone 8a with planting dates for Linn County.
Show all 42 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 18 | Apr 8 | Apr 15 | — | 365–730 |
| Anise | Mar 18 | Apr 8 | Apr 15 | Jul 15 – Sep 30 | 90–120 |
| Basil | Mar 4 | Apr 29 | May 6 | Jul 1 – Sep 2 | 50–75 |
| Bee Balm | — | — | Apr 29 | Jul 29 – Oct 14 | 90–120 |
| Borage | Mar 18 | Apr 8 | Apr 15 | Jun 10 – Jul 29 | 50–60 |
| Caraway | Mar 18 | Apr 8 | Apr 15 | — | 365–450 |
| Catnip | — | — | Apr 29 | Jul 1 – Sep 2 | 60–80 |
| Chamomile | Mar 18 | Apr 8 | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Chervil | Mar 18 | Apr 8 | Apr 15 | May 27 – Jul 29 | 40–60 |
| Chives | — | — | Apr 29 | Jul 1 – Sep 9 | 60–90 |
| Cilantro | Mar 18 | Apr 8 | Apr 15 | May 27 – Jul 29 | 40–60 |
| Comfrey | — | — | Apr 29 | Jul 1 – Sep 9 | 60–90 |
| Cumin | Mar 18 | Apr 8 | Apr 15 | Jul 29 – Sep 30 | 100–120 |
| Dill | Mar 18 | Apr 8 | Apr 15 | May 27 – Jul 29 | 40–60 |
| Echinacea | — | — | Apr 29 | Sep 2 – Dec 9 | 120–180 |
| Epazote | Mar 4 | Apr 29 | May 6 | Jun 24 – Aug 19 | 45–60 |
| Fennel (herb) | Mar 18 | Apr 8 | Apr 15 | Jun 17 – Aug 26 | 60–90 |
| Feverfew | — | — | Apr 29 | Jul 29 – Oct 14 | 90–120 |
| Garlic Chives | — | — | Apr 29 | Jul 1 – Sep 9 | 60–90 |
| Horehound | — | — | Apr 29 | Jul 15 – Sep 9 | 75–90 |
| Hyssop | — | — | Apr 29 | Jul 8 – Sep 9 | 70–90 |
| Lavender | — | — | Apr 29 | Jul 29 – Dec 30 | 90–200 |
| Lemon Balm | — | — | Apr 29 | Jul 1 – Aug 19 | 60–70 |
| Lemon Thyme | — | — | Apr 29 | Jul 8 – Sep 9 | 70–90 |
| Lemon Verbena | Mar 4 | Apr 29 | May 6 | Jul 8 – Sep 16 | 60–90 |
| Lemongrass | Mar 4 | Apr 29 | May 6 | Jul 22 – Oct 21 | 75–120 |
| Lovage | — | — | Apr 29 | Jul 8 – Sep 9 | 70–90 |
| Marjoram | — | — | Apr 29 | Jul 1 – Sep 9 | 60–90 |
| Mint | — | — | Apr 29 | Jul 1 – Sep 9 | 60–90 |
| Oregano | — | — | Apr 29 | Jul 1 – Sep 9 | 60–90 |
| Parsley | Mar 18 | Apr 8 | Apr 15 | Jun 17 – Aug 19 | 60–80 |
| Rosemary | — | — | Apr 29 | Jul 22 – Dec 9 | 80–180 |
| Rue | — | — | Apr 29 | Jul 8 – Sep 9 | 70–90 |
| Sage | — | — | Apr 29 | Jul 15 – Sep 9 | 75–90 |
| Savory | — | — | Apr 29 | Jun 24 – Aug 19 | 50–70 |
| Sorrel | Mar 18 | Apr 8 | Apr 15 | May 27 – Jul 29 | 40–60 |
| Stevia | Mar 4 | Apr 29 | May 6 | Jul 8 – Sep 16 | 60–90 |
| Tarragon | — | — | Apr 29 | Jul 1 – Sep 9 | 60–90 |
| Thai Basil | Mar 4 | Apr 29 | May 6 | Jul 1 – Sep 2 | 50–75 |
| Thyme | — | — | Apr 29 | Jul 8 – Sep 9 | 70–90 |
| Valerian | — | — | Apr 29 | Sep 2 – Dec 9 | 120–180 |
| Yarrow | — | — | Apr 29 | Jul 29 – Oct 14 | 90–120 |
Monthly Planting Guide for Linn County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Linn County.
Frequently Asked Questions
What planting zone is Linn County, OR?
Linn County is in USDA Hardiness Zone 8a. 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 Linn County, OR?
Based on 31 years of NOAA weather station data, the median last spring frost in Linn County falls around April 22. In 8 out of 10 years, last frost lands between March 25 and May 15 — a 50-day window of variability. Use May 15 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Linn County, OR?
The median first fall frost in Linn County arrives around October 25. In cold years it can arrive as early as October 5; in mild years as late as November 20. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Linn County?
Linn County has a frost-free growing season of approximately 186 days. This is enough time for most warm-season crops including tomatoes, peppers, and squash with proper timing. Climate records show the growing season is trending longer by about 3.62 days per decade.
What is the soil like in Linn County for gardening?
Linn County has predominantly Silt Loam soil with a pH range of 5.6–6.3 and Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Linn County?
Linn County has commercial agriculture that includes Wheat, Potatoes, Apples. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Linn County a good location for home gardening?
Linn County scores 61/100 (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 Linn County gardeners in Zone 8a organize planting dates, track what's growing, and never miss a planting window.
Get Your Free Garden Planner →Free download. Plan your entire garden season in minutes.
