Columbia County, OR — Planting Guide
Your June gardening checklist
Each item below is timed to Columbia County, Oregon's frost dates and soil temperatures. Skip nothing, stress about nothing.
-
Start basil, peppers, and pole beans indoors
You're about 19 weeks out from your last frost — the perfect window to get these germinating indoors.
-
Collect basil, carrots, and cucumber at their peak
Taste as you pick. The first ripe produce is the best feedback loop you'll get all season.
Coming up in July — start thinking about
- First harvests: basil, carrots, and cucumber
Columbia County is in USDA Zone 8b. The average last spring frost is April 14 and the first fall frost is October 29, giving you a growing season of approximately 198 days.
At an elevation of 396 ft, Columbia County receives approximately 46.6 in of rainfall annually. Summer highs average 85°F with winter lows around 39°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 51 days year to year — ranging from March 20 in warm years to May 10 in cold years. Columbia County scores 74/100 (Good) on the Microclimate Index.
🌡️ Zone
8b (15°F to 20°F min)
❄️ Last Frost
April 14
🍂 First Frost
October 29
📅 Growing Season
198 days
⛰️ Elevation
396 ft
🌧️ Annual Rainfall
46.6 in
Monthly Watering Calendar for Columbia County
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
Why it matters: Most vegetables want about 1 inch of water per week. Columbia County gets 47" a year — months that hit that 1"/week need zero supplemental watering; months that fall short, the table tells you how much to add. Saves you from drowning roots and from drought-stressing plants into bolting.
View detailed monthly data
| Month | Avg Rainfall | Rainy Days | Extra Water Needed | Watering Effort |
|---|---|---|---|---|
| Jan | 6.5 in | 19 days | — | None |
| Feb | 4.8 in | 13 days | — | Low |
| Mar | 4.9 in | 14 days | — | Low |
| Apr | 3.2 in | 14 days | 1.1 in | Moderate |
| May | 2.9 in | 11 days | 1.4 in | Moderate |
| Jun | 1.7 in | 6 days | 2.6 in | High |
| Jul | 0.7 in | 3 days | 3.6 in | Critical |
| Aug | 0.8 in | 3 days | 3.5 in | Critical |
| Sep | 1.9 in | 4 days | 2.4 in | High |
| Oct | 3.9 in | 10 days | 0.4 in | Low |
| Nov | 7.6 in | 16 days | — | Low |
| Dec | 7.7 in | 19 days | — | None |
Annual total: 46.6 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.
Columbia County Soil Profile
Soil Type
Silt Loam
Soil pH
5.5-6.6
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 10 | Nov 20 | 194 days |
| Cautious | Apr 22 | Nov 7 | 199 days |
| Average year | Apr 14 | Oct 29 | 198 days |
| Optimistic | Apr 7 | Oct 21 | 197 days |
| Aggressive (risky) | Mar 20 | Oct 10 | 204 days |
Not very — frost dates can vary by ±51 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Slightly — seasons are trending a bit longer (0.4 days/decade). Historical frost dates are still reliable for planning.
Gardening Difficulty Score
Columbia County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Columbia 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 Columbia County's climate and soil.
County Extension Office
Columbia 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 Columbia County
Finding local nurseries & garden centers in Columbia County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Columbia 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 Columbia County OR" or "garden center Columbia 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 Columbia County OR" or check your extension office and local parks department. Facebook groups like "Columbia 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 Columbia County
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
Why it matters: Lettuce and cilantro "bolt" (go to seed) when days lengthen. Knowing your day-length curve helps you time spring plantings to harvest before the bolting trigger hits. Columbia County's daylight ranges shape the planting calendar.
Longest Day
15.5 hours
Summer solstice daylight
Shortest Day
8.5 hours
Winter solstice daylight
Peak Sun Hours
10.5 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 | 8.8 hr | 2.2 hr | Short day |
| February | 10.1 hr | 3.1 hr | Short day |
| March | 11.6 hr | 4 hr | Short day |
| April | 13.3 hr | 5.5 hr | Neutral |
| May | 14.7 hr | 7.6 hr | Long day |
| June | 15.5 hr | 8.3 hr | Long day |
| July | 15.2 hr | 10.5 hr | Long day |
| August | 14 hr | 10 hr | Long day |
| September | 12.3 hr | 7.4 hr | Neutral |
| October | 10.7 hr | 4.2 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 Columbia County
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
The practical takeaway: Mulched soil swings less. The mulch insulates against both winter cold and summer heat. In Columbia County, an aggressive mulch program shifts your effective soil temperature curve toward optimal for most crops.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Apr through Nov.
Best Month to Compost
May
Microbial activity peaks when soil is warm.
Active Composting
10 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 44°F | 51°F | 🐢 Slow | ~24 weeks |
| Feb | 44°F | 49°F | 🐢 Slow | ~24 weeks |
| Mar | 52°F | 53°F | ♻️ Active | ~14 weeks |
| Apr | 60°F | 62°F | ♻️ Active | ~14 weeks |
| May | 72°F | 70°F | 🔥 Peak | ~8 weeks |
| Jun | 80°F | 75°F | 🔥 Peak | ~8 weeks |
| Jul | 88°F | 84°F | 🔥 Peak | ~8 weeks |
| Aug | 89°F | 86°F | 🔥 Peak | ~8 weeks |
| Sep | 85°F | 82°F | 🔥 Peak | ~8 weeks |
| Oct | 73°F | 74°F | 🔥 Peak | ~8 weeks |
| Nov | 61°F | 65°F | ♻️ Active | ~14 weeks |
| Dec | 50°F | 57°F | ♻️ Active | ~14 weeks |
Highlighted rows = soil 60°F+ (safe for warm-season transplants). Compost finishes fastest during peak activity months.
Pest & Disease Pressure in Columbia County
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
For new gardeners: The most successful gardeners in high-pressure regions don't spray more — they design around the problem. Crop rotation, companion planting, and resistant varieties beat reactive spraying.
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 | Moderate | May, Jun, Jul |
| Stink bugs | High | Apr, May, Jun, Jul, Aug, Sep, Oct |
| Whiteflies | Moderate | May, Jun, Jul, Aug, Sep, Oct |
| Spider mites | Moderate | Jun, Jul, Aug, Sep |
| Fire ants | Moderate | 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 Columbia County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
Why this matters: Bare soil is wasted soil — it loses nutrients to rain, dries out, compacts, and gets taken over by weeds. Cover crops (clovers, ryegrass, vetch, peas) are the "between seasons" trick that makes soil better every year. In Columbia County, you can fit a cover crop into the gaps.
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 19 | Sep 3 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Apr 18 | Aug 20 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Apr 18 | Aug 20 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 14 | Aug 20 | ✓ 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 8 | — | 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 | Sep 5 | Mar 31 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 28 | Mar 24 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 3 | Mar 24 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 16 | Mar 24 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 19 | Mar 24 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 27 | Mar 24 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Aug 5 | Mar 24 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Columbia County
Why it matters: Pollinators avoid windy days. Columbia County's 9.4 mph average wind isn't enough to stop bees and butterflies — but plant fruiting crops (tomatoes, peppers, squash) in protected microclimates and you'll see noticeably better fruit set.
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: 9 mph Winter: 12 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 (455 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting in Columbia County
How much water you can collect, when to collect it, and what size system you need for your garden.
Quick context: Most gardens use 0.5-1 gallon per square foot per week in summer. Columbia County's 47" annual rainfall is enough to cover most needs if you can capture it. Rain barrels under downspouts are the simplest entry point.
Annual Collection
23,225 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 2,000 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 46.6 inches of rain per year
- A 1,000 sq ft roof can collect roughly 23,225 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 Columbia County
Soil Type
Silt Loam
Soil pH 5.5–6.6 · Well Drained drainage
Good candidate for raised beds to maximise drainage and extend the season.
Watering Needs
Drought stress: 3.5/10
Low-to-moderate drought stress. Plan to water 1–2 times per week during peak summer. (46.6 in. annual rainfall)
Season Tips
198-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.
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 Columbia County
114 vegetables that grow well in Zone 8b with planting dates for Columbia County.
Show all 114 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Mar 17 | Apr 21 | Apr 28 | — | Jul 21 – Aug 25 | 80–100 |
| Amaranth | Feb 24 | Apr 21 | Apr 28 | — | Jul 28 – Sep 15 | 90–120 |
| Artichoke | — | — | Apr 28 | — | Sep 1 – Nov 10 | 120–180 |
| Arugula | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 19 – Jul 21 | 30–50 |
| Asparagus | — | — | Apr 28 | — | — | 730–1095 |
| Beets | — | Mar 31 | — | Aug 20 | May 26 – Jun 23 | 50–70 |
| Belgian Endive | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Aug 4 – Sep 29 | 110–150 |
| Bitter Melon | Feb 24 | Apr 21 | Apr 28 | — | Jun 30 – Aug 11 | 60–90 |
| Black Beans | — | Apr 21 | — | — | Jul 21 – Sep 8 | 90–120 |
| Bok Choy | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 26 – Jun 30 | 40–60 |
| Broccoli | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 16 – Jul 28 | 60–90 |
| Broccoli Rabe | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 26 – Jun 30 | 40–60 |
| Brussels Sprouts | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jul 14 – Sep 8 | 90–130 |
| Butternut Squash | Mar 17 | Apr 21 | Apr 28 | — | Jul 28 – Sep 1 | 85–110 |
| Cabbage | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 16 – Aug 11 | 60–100 |
| Calabash | Feb 24 | Apr 21 | Apr 28 | — | Jul 21 – Sep 15 | 80–120 |
| Cardoon | — | — | Apr 28 | — | Sep 1 – Oct 13 | 120–150 |
| Carrots | — | Mar 31 | — | Aug 20 | Jun 2 – Jul 7 | 60–80 |
| Cauliflower | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Aug 11 | 55–100 |
| Celeriac | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jul 28 – Sep 1 | 100–120 |
| Celery | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jul 7 – Sep 1 | 80–120 |
| Celtuce | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 16 – Jul 28 | 60–90 |
| Chard | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Jul 28 | 50–60 |
| Chayote | Feb 24 | Apr 21 | Apr 28 | — | Sep 1 – Nov 10 | 120–180 |
| Chickpeas | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jul 7 – Aug 18 | 80–110 |
| Chicory | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 16 – Jul 28 | 60–85 |
| Chinese Cabbage | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Jul 7 | 50–70 |
| Christmas Lima Beans | Feb 24 | Apr 21 | Apr 28 | — | Jul 21 – Aug 25 | 80–100 |
| Collard Greens | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Aug 11 | 55–75 |
| Corn | — | Apr 21 | — | — | Jun 23 – Aug 18 | 60–100 |
| Cowpeas | — | Apr 21 | — | — | Jun 23 – Aug 4 | 60–90 |
| Cress | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Apr 28 – May 19 | 14–21 |
| Crookneck Squash | Mar 17 | Apr 21 | Apr 28 | — | Jun 16 – Jul 14 | 45–60 |
| Crosne | — | Mar 31 | — | Aug 20 | Sep 1 – Nov 3 | 150–200 |
| Cucumber | Mar 17 | Apr 21 | Apr 28 | — | Jun 23 – Aug 18 | 50–70 |
| Daikon | — | Mar 31 | — | Aug 20 | May 26 – Jun 23 | 50–70 |
| Delicata Squash | Mar 17 | Apr 21 | Apr 28 | — | Jul 21 – Aug 25 | 80–100 |
| Edamame | — | Apr 21 | — | — | Jul 7 – Aug 18 | 75–100 |
| Eggplant | Feb 10 | Apr 21 | Apr 28 | — | Jul 7 – Sep 8 | 65–85 |
| Endive | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 2 – Jul 7 | 45–65 |
| Escarole | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Jul 7 | 50–70 |
| Fava Beans | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 30 – Aug 11 | 75–100 |
| Fennel | Feb 24 | Apr 21 | Apr 28 | — | Jun 30 – Aug 11 | 60–90 |
| Garlic | — | — | — | Sep 17 | Dec 17 – Jun 3 | 90–240 |
| Ginger | Feb 24 | Apr 21 | Apr 28 | — | Dec 29 – Jan 12 | 240–300 |
| Green Beans | — | Apr 21 | — | — | Jun 16 – Aug 11 | 50–65 |
| Horseradish | — | — | Apr 28 | — | Sep 1 – Nov 10 | 120–180 |
| Hot Peppers | Feb 10 | Apr 21 | Apr 28 | — | Jul 7 – Oct 13 | 70–120 |
| Hubbard Squash | Mar 17 | Apr 21 | Apr 28 | — | Aug 11 – Sep 15 | 100–120 |
| Jicama | Feb 24 | Apr 21 | Apr 28 | — | Sep 1 – Nov 10 | 120–180 |
| Kabocha | Mar 17 | Apr 21 | Apr 28 | — | Jul 28 – Aug 25 | 85–100 |
| Kai Lan | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 2 – Jun 30 | 45–60 |
| Kale | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Aug 4 | 50–70 |
| Kidney Beans | — | Apr 21 | — | — | Jul 21 – Aug 25 | 85–110 |
| Kohlrabi | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 2 – Jul 7 | 45–65 |
| Komatsuna | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 19 – Jun 23 | 35–50 |
| Leeks | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jul 14 – Sep 29 | 90–150 |
| Lentils | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jul 7 – Aug 18 | 80–110 |
| Lettuce | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 19 – Jul 28 | 30–60 |
| Lima Beans | — | Apr 21 | — | — | Jun 23 – Aug 4 | 60–90 |
| Loofah | Feb 24 | Apr 21 | Apr 28 | — | Aug 11 – Oct 13 | 100–150 |
| Luffa | Feb 24 | Apr 21 | Apr 28 | — | Jul 28 – Oct 13 | 90–150 |
| Mache | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 26 – Jun 30 | 40–60 |
| Malabar Spinach | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Jul 21 | 55–70 |
| Melon | Mar 17 | Apr 21 | Apr 28 | — | Jul 7 – Aug 25 | 70–100 |
| Microgreens | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Apr 21 – May 19 | 7–21 |
| Mitsuba | Mar 10 | Mar 31 | Apr 7 | Aug 20 | Jun 2 – Jul 28 | 50–70 |
| Mizuna | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 19 – Jun 16 | 30–45 |
| Mustard Greens | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 19 – Jul 21 | 30–50 |
| Napa Cabbage | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Jul 14 | 55–75 |
| New Zealand Spinach | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Jul 21 | 55–70 |
| Okra | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Aug 18 | 50–65 |
| Onion | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jul 14 – Sep 1 | 90–120 |
| Pac Choi | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 26 – Jun 23 | 40–55 |
| Parsnip | — | Mar 31 | — | Aug 20 | Jul 14 – Aug 25 | 100–130 |
| Patty Pan Squash | Mar 17 | Apr 21 | Apr 28 | — | Jun 16 – Jul 14 | 45–60 |
| Peas | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Aug 4 | 55–70 |
| Peppers | Feb 10 | Apr 21 | Apr 28 | — | Jun 30 – Sep 8 | 60–90 |
| Pole Beans | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Aug 18 | 55–70 |
| Potatoes | Feb 24 | Apr 21 | Apr 28 | — | Jul 7 – Sep 15 | 70–120 |
| Pumpkin | Mar 17 | Apr 21 | Apr 28 | — | Jul 28 – Sep 15 | 85–120 |
| Purslane | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 26 – Jun 30 | 40–60 |
| Radicchio | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 16 – Jul 21 | 60–80 |
| Radish | — | Mar 31 | — | Aug 20 | Apr 28 – May 19 | 22–35 |
| Rhubarb | — | — | May 5 | — | — | 365–730 |
| Romanesco | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 30 – Aug 11 | 75–100 |
| Rutabaga | — | Mar 31 | — | Aug 20 | Jun 23 – Jul 28 | 80–100 |
| Salsify | — | Mar 31 | — | Aug 20 | Jul 14 – Aug 25 | 100–130 |
| Savoy Cabbage | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 23 – Aug 18 | 70–110 |
| Scallions | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Jul 7 | 50–70 |
| Scarlet Runner Beans | Feb 24 | Apr 21 | Apr 28 | — | Jun 30 – Aug 4 | 60–80 |
| Shallot | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jul 14 – Sep 1 | 90–120 |
| Shiso | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Aug 18 | 50–70 |
| Snap Peas | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Aug 18 | 55–70 |
| Snow Peas | Mar 10 | Mar 31 | Apr 14 | Aug 20 | Jun 9 – Aug 4 | 50–65 |
| Soybeans | — | Apr 21 | — | — | Jul 14 – Sep 8 | 80–120 |
| Spaghetti Squash | Mar 17 | Apr 21 | Apr 28 | — | Jul 28 – Aug 25 | 85–100 |
| Spinach | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 19 – Jul 21 | 35–50 |
| Squash (Summer) | Mar 17 | Apr 21 | Apr 28 | — | Jun 16 – Aug 18 | 45–65 |
| Squash (Winter) | Mar 17 | Apr 21 | Apr 28 | — | Jul 21 – Sep 15 | 80–120 |
| Sunchoke | — | — | Apr 28 | — | Aug 18 – Oct 13 | 110–150 |
| Sweet Corn | — | Apr 21 | — | — | Jun 23 – Aug 4 | 60–90 |
| Sweet Potatoes | Feb 24 | Apr 21 | Apr 28 | — | Jul 28 – Sep 15 | 90–120 |
| Tatsoi | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 19 – Jun 23 | 35–50 |
| Tomatillo | Feb 24 | Apr 21 | Apr 28 | — | Jun 30 – Sep 8 | 60–85 |
| Tomatoes | Feb 24 | Apr 21 | Apr 28 | — | Jun 30 – Sep 8 | 60–85 |
| Turmeric | Feb 24 | Apr 21 | Apr 28 | — | Dec 29 – Jan 12 | 240–300 |
| Turnip | — | Mar 31 | — | Aug 20 | May 12 – Jun 16 | 40–60 |
| Watercress | Mar 10 | Mar 31 | Apr 14 | Aug 20 | May 26 – Jun 30 | 40–60 |
| Watermelon | Mar 17 | Apr 21 | Apr 28 | — | Jul 7 – Aug 25 | 70–100 |
| Wax Beans | — | Apr 21 | — | — | Jun 16 – Aug 11 | 50–65 |
| Winter Melon | Feb 24 | Apr 21 | Apr 28 | — | Jul 28 – Sep 15 | 90–120 |
| Yard Long Beans | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Aug 4 | 55–80 |
| Zucchini | Mar 17 | Apr 21 | Apr 28 | — | Jun 16 – Aug 11 | 45–60 |
🍓 Fruits to Grow in Columbia County
27 fruits that grow well in Zone 8b with planting dates for Columbia County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 5 | — | Aug 4 – Nov 17 | 90–180 |
| Aronia | — | — | May 5 | — | — | 730–1095 |
| Blackberries | — | — | May 5 | — | — | 365–730 |
| Blueberries | — | — | May 5 | — | — | 730–1095 |
| Boysenberries | — | — | May 5 | — | — | 365–730 |
| Cantaloupe | — | — | May 5 | — | Jul 14 – Aug 18 | 70–90 |
| Che Fruit | — | — | May 5 | — | — | 1095–1825 |
| Elderberries | — | — | May 5 | — | — | 730–1095 |
| Figs | — | — | May 5 | — | — | 730–1825 |
| Goji Berries | — | — | May 5 | — | — | 730–1095 |
| Gooseberries | — | — | May 5 | — | — | 730–1095 |
| Grapes | — | — | May 5 | — | — | 730–1095 |
| Ground Cherry | — | — | May 5 | — | Jul 14 – Sep 8 | 65–80 |
| Hardy Kiwi | — | — | May 5 | — | — | 1095–1825 |
| Honeydew | — | — | May 5 | — | Jul 28 – Sep 8 | 80–110 |
| Jostaberry | — | — | May 5 | — | — | 730–1095 |
| Kiwi | — | — | May 5 | — | — | 1095–1825 |
| Loquat | — | — | May 5 | — | — | 730–1825 |
| Medlar | — | — | May 5 | — | — | 1095–1825 |
| Mulberries | — | — | May 5 | — | — | 730–1825 |
| Pawpaw | — | — | May 5 | — | — | 1095–2555 |
| Persimmon | — | — | May 5 | — | — | 1095–2555 |
| Pomegranate | — | — | May 5 | — | — | 730–1095 |
| Quince | — | — | May 5 | — | — | 1095–1825 |
| Raspberries | — | — | May 5 | — | — | 365–730 |
| Serviceberries | — | — | May 5 | — | — | 730–1095 |
| Strawberries | — | — | May 5 | — | Aug 4 – Jan 19 | 90–365 |
🌿 Herbs to Grow in Columbia County
39 herbs that grow well in Zone 8b with planting dates for Columbia County.
Show all 39 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Mar 10 | Mar 31 | Apr 7 | Aug 20 | — | 365–730 |
| Anise | Mar 10 | Mar 31 | Apr 7 | Aug 20 | Jul 7 – Sep 22 | 90–120 |
| Basil | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Aug 25 | 50–75 |
| Bee Balm | — | — | Apr 21 | — | Jul 21 – Oct 6 | 90–120 |
| Borage | Mar 10 | Mar 31 | Apr 7 | Aug 20 | Jun 2 – Jul 21 | 50–60 |
| Caraway | Mar 10 | Mar 31 | Apr 7 | Aug 20 | — | 365–450 |
| Catnip | — | — | Apr 21 | — | Jun 23 – Aug 25 | 60–80 |
| Chamomile | Mar 10 | Mar 31 | Apr 7 | Aug 20 | Jun 9 – Aug 18 | 60–90 |
| Chervil | Mar 10 | Mar 31 | Apr 7 | Aug 20 | May 19 – Jul 21 | 40–60 |
| Chives | — | — | Apr 21 | — | Jun 23 – Sep 1 | 60–90 |
| Cilantro | Mar 10 | Mar 31 | Apr 7 | Aug 20 | May 19 – Jul 21 | 40–60 |
| Comfrey | — | — | Apr 21 | — | Jun 23 – Sep 1 | 60–90 |
| Cumin | Mar 10 | Mar 31 | Apr 7 | Aug 20 | Jul 21 – Sep 22 | 100–120 |
| Dill | Mar 10 | Mar 31 | Apr 7 | Aug 20 | May 19 – Jul 21 | 40–60 |
| Epazote | Feb 24 | Apr 21 | Apr 28 | — | Jun 16 – Aug 11 | 45–60 |
| Fennel (herb) | Mar 10 | Mar 31 | Apr 7 | Aug 20 | Jun 9 – Aug 18 | 60–90 |
| Feverfew | — | — | Apr 21 | — | Jul 21 – Oct 6 | 90–120 |
| Garlic Chives | — | — | Apr 21 | — | Jun 23 – Sep 1 | 60–90 |
| Horehound | — | — | Apr 21 | — | Jul 7 – Sep 1 | 75–90 |
| Hyssop | — | — | Apr 21 | — | Jun 30 – Sep 1 | 70–90 |
| Lemon Balm | — | — | Apr 21 | — | Jun 23 – Aug 11 | 60–70 |
| Lemon Thyme | — | — | Apr 21 | — | Jun 30 – Sep 1 | 70–90 |
| Lemon Verbena | Feb 24 | Apr 21 | Apr 28 | — | Jun 30 – Sep 8 | 60–90 |
| Lemongrass | Feb 24 | Apr 21 | Apr 28 | — | Jul 14 – Oct 13 | 75–120 |
| Lovage | — | — | Apr 21 | — | Jun 30 – Sep 1 | 70–90 |
| Marjoram | — | — | Apr 21 | — | Jun 23 – Sep 1 | 60–90 |
| Mint | — | — | Apr 21 | — | Jun 23 – Sep 1 | 60–90 |
| Oregano | — | — | Apr 21 | — | Jun 23 – Sep 1 | 60–90 |
| Parsley | Mar 10 | Mar 31 | Apr 7 | Aug 20 | Jun 9 – Aug 11 | 60–80 |
| Rosemary | — | — | Apr 21 | — | Jul 14 – Dec 1 | 80–180 |
| Rue | — | — | Apr 21 | — | Jun 30 – Sep 1 | 70–90 |
| Sage | — | — | Apr 21 | — | Jul 7 – Sep 1 | 75–90 |
| Savory | — | — | Apr 21 | — | Jun 16 – Aug 11 | 50–70 |
| Sorrel | Mar 10 | Mar 31 | Apr 7 | Aug 20 | May 19 – Jul 21 | 40–60 |
| Stevia | Feb 24 | Apr 21 | Apr 28 | — | Jun 30 – Sep 8 | 60–90 |
| Tarragon | — | — | Apr 21 | — | Jun 23 – Sep 1 | 60–90 |
| Thai Basil | Feb 24 | Apr 21 | Apr 28 | — | Jun 23 – Aug 25 | 50–75 |
| Thyme | — | — | Apr 21 | — | Jun 30 – Sep 1 | 70–90 |
| Valerian | — | — | Apr 21 | — | Aug 25 – Dec 1 | 120–180 |
🌸 Flowers to Grow in Columbia County
54 flowers that grow well in Zone 8b with planting dates for Columbia County.
Show all 54 flowers with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 3 | Mar 31 | Mar 31 | — | May 26 – Oct 27 | 60–75 |
| Alliums | — | — | — | Oct 1 | Oct 29 – Nov 19 | 28–42 |
| Anemones | — | — | — | Sep 3 | Sep 10 – Oct 8 | 90–120 |
| Astilbe | Feb 17 | — | Apr 14 | — | Jun 23 – Aug 11 | 70–100 |
| Bachelor's Button | — | Feb 24 | Mar 24 | Sep 3 | May 26 – Sep 22 | 60–90 |
| Begonias | Feb 3 | — | Mar 31 | — | Jun 9 – Nov 10 | 70–90 |
| Black-eyed Susan | Feb 17 | Mar 31 | Apr 14 | — | Jun 23 – Nov 17 | 60–80 |
| Bleeding Hearts | Feb 17 | — | Apr 14 | — | Jun 2 – Jun 30 | 60–90 |
| Calendula | — | Feb 24 | Mar 24 | Aug 20 | May 12 – Oct 6 | 50–70 |
| California Poppy | — | — | — | Aug 20 | Oct 29 – Feb 18 | 60–90 |
| Celosia | Mar 17 | Mar 31 | Mar 31 | — | Jun 2 – Nov 10 | 60–90 |
| Columbine | Feb 17 | Apr 14 | Apr 14 | — | Jun 2 – Jun 30 | 70–100 |
| Coreopsis | Feb 17 | Mar 31 | Apr 14 | — | Jun 16 – Nov 10 | 60–80 |
| Cosmos | Mar 17 | Mar 24 | Mar 24 | — | Jun 2 – Nov 3 | 60–90 |
| Crocus | — | — | — | Oct 1 | Sep 3 – Sep 24 | 10–20 |
| Daffodils | — | — | — | Oct 1 | Sep 10 – Oct 8 | 20–40 |
| Dahlias | Mar 24 | Apr 14 | Apr 14 | — | Jun 23 – Dec 8 | 70–120 |
| Daylily | Feb 17 | — | Apr 14 | — | Jun 23 – Nov 24 | 60–90 |
| Dianthus | Feb 17 | Feb 24 | Mar 3 | — | Apr 21 – Jun 30 | 60–80 |
| Echinacea (Purple Coneflower) | Feb 17 | Apr 14 | Apr 14 | — | Jun 23 – Nov 10 | 70–90 |
| Foxglove | Feb 17 | Apr 7 | Apr 7 | — | May 26 – Jun 23 | 80–120 |
| Freesia | — | — | — | Sep 17 | Oct 8 – Nov 12 | 84–112 |
| Gaillardia (Blanket Flower) | Mar 3 | Mar 31 | Mar 31 | — | Jun 9 – Nov 24 | 70–100 |
| Geraniums | Feb 3 | — | Mar 31 | — | Jun 9 – Nov 10 | 70–100 |
| Gladiolus | — | Apr 14 | Apr 14 | — | Jun 23 – Dec 8 | 70–100 |
| Hostas | Feb 10 | — | Apr 14 | — | Jun 23 – Oct 27 | 60–90 |
| Hyacinths | — | — | — | Oct 1 | Sep 24 – Oct 15 | 14–28 |
| Hydrangeas | Feb 10 | — | Apr 7 | — | Jun 16 – Oct 20 | 90–150 |
| Impatiens | Feb 17 | — | Apr 7 | — | Jun 16 – Nov 17 | 60–75 |
| Irises | — | Division | Apr 7 | — | May 26 – Jun 30 | 60–100 |
| Larkspur | — | — | — | Aug 20 | Oct 29 – Feb 18 | 60–90 |
| Lavender | Feb 17 | — | Apr 14 | — | Jun 23 – Sep 29 | 90–120 |
| Lilies | — | Division | Apr 7 | — | Jun 16 – Oct 6 | 70–120 |
| Lobelia | Feb 17 | — | Mar 3 | — | Apr 28 – Jun 9 | 70–80 |
| Lupine | Feb 17 | Apr 14 | Apr 14 | — | Jun 2 – Jun 30 | 75–100 |
| Marigolds | Mar 10 | Mar 31 | Mar 31 | — | May 26 – Oct 13 | 50–70 |
| Nasturtium | Mar 17 | Mar 31 | Mar 31 | — | May 26 – Nov 10 | 55–65 |
| Pansy | Feb 3 | — | Mar 24 | Aug 20 | May 19 – Sep 8 | 70–90 |
| Peonies | — | Division | Apr 14 | — | Jun 9 – Jul 7 | 90–120 |
| Petunia | Feb 17 | — | Apr 7 | — | Jun 16 – Nov 3 | 70–90 |
| Phlox | Feb 17 | Apr 14 | Apr 14 | — | Jun 23 – Sep 1 | 80–110 |
| Portulaca | Mar 17 | Mar 31 | Mar 31 | — | May 19 – Oct 27 | 50–70 |
| Ranunculus | — | — | — | Sep 3 | Sep 17 – Oct 15 | 90–120 |
| Roses | Feb 10 | — | Apr 7 | — | Jun 16 – Nov 17 | 90–180 |
| Salvia | Feb 17 | — | Mar 31 | — | Jun 9 – Nov 10 | 70–90 |
| Sedum (Stonecrop) | Feb 17 | — | Apr 14 | — | Aug 4 – Oct 27 | 60–90 |
| Snapdragon | Feb 3 | Mar 3 | Mar 24 | Aug 20 | Jun 2 – Oct 6 | 70–100 |
| Sunflower | Mar 24 | Mar 31 | Mar 31 | — | Jun 23 – Nov 10 | 70–100 |
| Sweet Alyssum | Mar 3 | Mar 3 | Mar 24 | Sep 3 | May 5 – Sep 8 | 45–60 |
| Sweet Pea | — | — | — | Aug 27 | Nov 5 – Jan 14 | 65–85 |
| Tulips | — | — | — | Oct 1 | Sep 17 – Oct 15 | 15–30 |
| Vinca (Annual) | Feb 3 | — | Mar 31 | — | Jun 9 – Nov 10 | 70–90 |
| Yarrow | Feb 17 | Mar 31 | Apr 14 | — | Jun 16 – Nov 10 | 60–90 |
| Zinnia | Mar 17 | Mar 31 | Mar 31 | — | Jun 9 – Nov 10 | 60–70 |