Pullman, WA — Planting Guide for July
Free PDF, personalized for your town's frost dates & climate. Drop your email — we'll send the link.
July in Whitman County, Washington — your action list
Welcome to July in Zone 6b. These are the moves that will have the biggest impact on your growing season.
-
Sow peppers, pole beans, and tomatoes in trays indoors
Bottom-water once the first true leaves appear — it keeps stems dry and knocks back damping-off.
-
It's harvest week for basil, carrots, and cucumber
If you can't use it all right away, check the food-preservation section of your planner.
-
Get carrots, kale, and lettuce in for a late-season harvest
Mid-season soil is hot. Sow a bit deeper than the packet suggests to find cooler, damper ground.
Looking ahead to August
- First harvests: basil, carrots, and cucumber
- Fall sowing: alliums, bachelor's button, and crocus
Pullman has a classic four-season growing climate (Zone 6b). The last spring frost typically lands around May 10 and the first fall frost arrives around September 29 — a 142-day frost-free season that's long enough for tomatoes, peppers, melons, and a full succession of cool-weather crops on either side. The trick is timing: start warm-season seedlings indoors 6–8 weeks before last frost, harden them off, and plant out the week after your local frost date is statistically safe.
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.
Pullman averages 25.6 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
6b (-5°F to 0°F min)
❄️ Avg. Last Frost
May 10
🍂 Avg. First Frost
September 29
📅 Growing Season
142 days
🌧️ Climate
Moderate 26.8" annual
💨 Wind
Moderate 7.4 mph avg
🥶 Frost Tier
Regular 0% frost-free years
🏜️ Drought
25.6 wk/yr trend stable
📍 ZIP Codes
2 ZIPs
Monthly Watering Calendar for Pullman
When you'll need to water your garden — based on average monthly rainfall vs. the ~1 inch/week most gardens need.
The practical takeaway: Most vegetables want about 1 inch of water per week. Pullman gets 27" 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 | 2.2 in | 19 days | — | None |
| Feb | 1.5 in | 15 days | — | None |
| Mar | 1.3 in | 14 days | 3 in | High |
| Apr | 1.2 in | 12 days | 3.1 in | Critical |
| May | 0.8 in | 11 days | 3.5 in | Critical |
| Jun | 0.6 in | 6 days | 3.7 in | Critical |
| Jul | 0.3 in | 2 days | 4 in | Critical |
| Aug | 0.2 in | 3 days | 4.1 in | Critical |
| Sep | 0.6 in | 5 days | 3.7 in | Critical |
| Oct | 1.3 in | 11 days | 3 in | High |
| Nov | 2.2 in | 15 days | — | None |
| Dec | 2.5 in | 15 days | — | None |
Annual total: 14.7 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.
Pullman Soil Profile
Soil Type
Silt Loam
Soil pH
5.5-6.7
Drainage
Well Drained
Frost Risk Probability
Based on 31 years of NOAA weather station data from 3 stations
Beginners: Plant frost-sensitive crops (tomatoes, peppers, squash) after the "Safe" date on the left. Harvest or cover them before the "Protect by" date on the right. Hardy crops (lettuce, peas, kale) can go in the yellow transition zones.
How to read this table: "Conservative" means you're safe from frost 9 out of 10 years — best for beginners and frost-sensitive crops. "Average year" is the typical date. "Aggressive" means only 1 in 10 years is that warm — experienced gardeners with frost protection can try these dates.
| Planting Strategy | Last Spring Frost | First Fall Frost | Frost-Free Days |
|---|---|---|---|
| Conservative (safest) | Jun 6 | Oct 22 | 138 days |
| Cautious | May 18 | Oct 8 | 143 days |
| Average year | May 10 | Sep 29 | 142 days |
| Optimistic | Apr 29 | Sep 19 | 143 days |
| Aggressive (risky) | Apr 13 | Sep 4 | 144 days |
Not very — frost dates can vary by ±54 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 shorter here (about 1.4 days per decade). Use the "Conservative" dates and choose fast-maturing varieties.
Gardening Difficulty Score
Whitman County presents some gardening challenges. Choose adapted varieties and plan around frost dates.
Local Gardening Help in Whitman 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 Whitman County's climate and soil.
County Extension Office
Whitman County Washington State University Extension Extension Office
Phone: 509-335-2811
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 Whitman County
Finding local nurseries & garden centers in Whitman County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Whitman 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 Whitman County WA" or "garden center Whitman 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 Whitman County WA" or check your extension office and local parks department. Facebook groups like "Whitman County Gardeners" or "Washington 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 Pullman
Monthly daylight hours and peak sun — critical for onion varieties, photoperiod-sensitive plants, and solar garden planning.
What this means for you: Onions are a great example of why day length matters. They "bulb up" only when daylight hits a specific number of hours — plant the wrong variety (short-day in the north, long-day in the south) and you'll get tiny bulbs no matter how well you grow them. Pullman's latitude determines which onion varieties succeed.
Longest Day
15.7 hours
Summer solstice daylight
Shortest Day
8.3 hours
Winter solstice daylight
Peak Sun Hours
10.9 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 | 8.7 hr | 2.2 hr | Short day |
| February | 10.1 hr | 3.1 hr | Short day |
| March | 11.6 hr | 3.9 hr | Short day |
| April | 13.4 hr | 5.6 hr | Neutral |
| May | 14.8 hr | 7.1 hr | Long day |
| June | 15.7 hr | 8.4 hr | Long day |
| July | 15.3 hr | 10.9 hr | Long day |
| August | 14 hr | 9.5 hr | Long day |
| September | 12.3 hr | 6.9 hr | Neutral |
| October | 10.6 hr | 4.2 hr | Short day |
| November | 9.1 hr | 2.3 hr | Short day |
| December | 8.3 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 Pullman
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Why it matters: Lettuce germinates at 35°F. Beans want 60°F. Tomatoes 65°F+. Soil temp, not air temp, is what plants feel. Pullman's monthly curve tells you when each crop actually has the conditions to take off.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from Jun through Oct.
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 | 28°F | 37°F | ❄️ Dormant | ~36 weeks |
| Feb | 28°F | 35°F | ❄️ Dormant | ~36 weeks |
| Mar | 35°F | 39°F | ❄️ Dormant | ~36 weeks |
| Apr | 49°F | 48°F | 🐢 Slow | ~24 weeks |
| May | 59°F | 59°F | ♻️ Active | ~14 weeks |
| Jun | 71°F | 66°F | 🔥 Peak | ~8 weeks |
| Jul | 79°F | 72°F | 🔥 Peak | ~8 weeks |
| Aug | 78°F | 76°F | 🔥 Peak | ~8 weeks |
| Sep | 73°F | 72°F | 🔥 Peak | ~8 weeks |
| Oct | 60°F | 63°F | ♻️ Active | ~14 weeks |
| Nov | 46°F | 51°F | 🐢 Slow | ~24 weeks |
| Dec | 36°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 Pullman
Computed from local climate patterns — warmer, humid conditions increase pest generations and fungal disease risk.
For new gardeners: Warm humid regions cycle through pest generations 3-5x faster than cold dry regions. Pullman's pest score is your early-warning system: high score means commit to disease-resistant varieties and accept some crop loss to bugs.
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 | Moderate | 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 | Moderate | 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 Pullman
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with planting dates calibrated for your area.
The practical takeaway: 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 Pullman, you can fit a cover crop into the gaps.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 13 | Jul 21 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 17 | Jul 21 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Apr 11 | Jul 21 | ✓ 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 28 | Sep 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 | Jul 21 | Apr 26 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Jul 22 | Apr 26 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Aug 17 | Apr 19 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 4 | Apr 26 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 1 | Apr 19 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jun 26 | Apr 26 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jun 21 | Apr 26 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate in Pullman
The practical takeaway: Pollinators avoid windy days. Pullman's 7.4 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: 10 mph Summer: 9 mph
Fall: 8 mph Winter: 11 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
4.6/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (419 ft range). Garden on slopes or higher ground if possible to avoid late-season frost pockets.
Rainwater Harvesting in Pullman
How much water you can collect, when to collect it, and what size system you need for your garden.
Quick context: Rainwater scales linearly with roof area. A 2,000 sq ft roof in Pullman captures ~1,200 gallons per 1" of rain — given 27" annual rainfall, that's thousands of gallons a year if you have storage to hold it.
Annual Collection
7,326 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 2,250 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Jan, Feb, Nov, Dec
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
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 14.7 inches of rain per year
- A 1,000 sq ft roof can collect roughly 7,326 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 Pullman
107 vegetables matched to Zone 6b with planting dates calibrated for Pullman.
Show all 107 vegetables with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Acorn Squash | Apr 5 | May 17 | May 24 | — | Aug 16 – Sep 20 | 80–100 |
| Amaranth | Mar 15 | May 17 | May 24 | — | Aug 23 – Oct 11 | 90–120 |
| Arugula | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 14 – Aug 16 | 30–50 |
| Asparagus | — | — | May 24 | — | — | 730–1095 |
| Beets | — | Apr 26 | — | Jul 21 | Jun 21 – Jul 19 | 50–70 |
| Belgian Endive | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 30 – Oct 25 | 110–150 |
| Bitter Melon | Mar 15 | May 17 | May 24 | — | Jul 26 – Sep 6 | 60–90 |
| Black Beans | — | May 17 | — | — | Aug 16 – Oct 4 | 90–120 |
| Bok Choy | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 21 – Jul 26 | 40–60 |
| Broccoli | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 12 – Aug 23 | 60–90 |
| Broccoli Rabe | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 21 – Jul 26 | 40–60 |
| Brussels Sprouts | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 9 – Oct 4 | 90–130 |
| Butternut Squash | Apr 5 | May 17 | May 24 | — | Aug 23 – Sep 27 | 85–110 |
| Cabbage | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 12 – Sep 6 | 60–100 |
| Calabash | Mar 15 | May 17 | May 24 | — | Aug 16 – Oct 11 | 80–120 |
| Carrots | — | Apr 26 | — | Jul 21 | Jun 28 – Aug 2 | 60–80 |
| Cauliflower | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Sep 6 | 55–100 |
| Celeriac | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 23 – Sep 27 | 100–120 |
| Celery | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 2 – Sep 27 | 80–120 |
| Celtuce | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 12 – Aug 23 | 60–90 |
| Chard | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Aug 23 | 50–60 |
| Chickpeas | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 2 – Sep 13 | 80–110 |
| Chicory | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 12 – Aug 23 | 60–85 |
| Chinese Cabbage | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Aug 2 | 50–70 |
| Christmas Lima Beans | Mar 15 | May 17 | May 24 | — | Aug 16 – Sep 20 | 80–100 |
| Collard Greens | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Sep 6 | 55–75 |
| Corn | — | May 17 | — | — | Jul 19 – Sep 13 | 60–100 |
| Cowpeas | — | May 17 | — | — | Jul 19 – Aug 30 | 60–90 |
| Cress | Apr 5 | Apr 26 | May 10 | Jul 21 | May 24 – Jun 14 | 14–21 |
| Crookneck Squash | Apr 5 | May 17 | May 24 | — | Jul 12 – Aug 9 | 45–60 |
| Crosne | — | Apr 26 | — | Jul 21 | Sep 27 – Nov 8 | 150–200 |
| Cucumber | Apr 5 | May 17 | May 24 | — | Jul 19 – Sep 13 | 50–70 |
| Daikon | — | Apr 26 | — | Jul 21 | Jun 21 – Jul 19 | 50–70 |
| Delicata Squash | Apr 5 | May 17 | May 24 | — | Aug 16 – Sep 20 | 80–100 |
| Edamame | — | May 17 | — | — | Aug 2 – Sep 13 | 75–100 |
| Eggplant | Mar 1 | May 17 | May 24 | — | Aug 2 – Oct 4 | 65–85 |
| Endive | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 28 – Aug 2 | 45–65 |
| Escarole | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Aug 2 | 50–70 |
| Fava Beans | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 26 – Sep 6 | 75–100 |
| Fennel | Mar 15 | May 17 | May 24 | — | Jul 26 – Sep 6 | 60–90 |
| Garlic | — | — | — | Aug 18 | Nov 17 – Mar 2 | 90–240 |
| Green Beans | — | May 17 | — | — | Jul 12 – Sep 6 | 50–65 |
| Horseradish | — | — | May 24 | — | Sep 27 – Dec 6 | 120–180 |
| Hot Peppers | Mar 1 | May 17 | May 24 | — | Aug 2 – Nov 8 | 70–120 |
| Hubbard Squash | Apr 5 | May 17 | May 24 | — | Sep 6 – Oct 11 | 100–120 |
| Kabocha | Apr 5 | May 17 | May 24 | — | Aug 23 – Sep 20 | 85–100 |
| Kai Lan | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 28 – Jul 26 | 45–60 |
| Kale | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Aug 30 | 50–70 |
| Kidney Beans | — | May 17 | — | — | Aug 16 – Sep 20 | 85–110 |
| Kohlrabi | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 28 – Aug 2 | 45–65 |
| Komatsuna | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 14 – Jul 19 | 35–50 |
| Leeks | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 9 – Oct 25 | 90–150 |
| Lentils | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 2 – Sep 13 | 80–110 |
| Lettuce | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 14 – Aug 23 | 30–60 |
| Lima Beans | — | May 17 | — | — | Jul 19 – Aug 30 | 60–90 |
| Loofah | Mar 15 | May 17 | May 24 | — | Sep 6 – Nov 8 | 100–150 |
| Luffa | Mar 15 | May 17 | May 24 | — | Aug 23 – Nov 8 | 90–150 |
| Mache | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 21 – Jul 26 | 40–60 |
| Melon | Apr 5 | May 17 | May 24 | — | Aug 2 – Sep 20 | 70–100 |
| Microgreens | Apr 5 | Apr 26 | May 10 | Jul 21 | May 17 – Jun 14 | 7–21 |
| Mitsuba | Apr 5 | Apr 26 | May 3 | Jul 21 | Jun 28 – Aug 23 | 50–70 |
| Mizuna | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 14 – Jul 12 | 30–45 |
| Mustard Greens | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 14 – Aug 16 | 30–50 |
| Napa Cabbage | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Aug 9 | 55–75 |
| New Zealand Spinach | Mar 15 | May 17 | May 24 | — | Jul 19 – Aug 16 | 55–70 |
| Okra | Mar 15 | May 17 | May 24 | — | Jul 19 – Sep 13 | 50–65 |
| Onion | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 9 – Sep 27 | 90–120 |
| Pac Choi | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 21 – Jul 19 | 40–55 |
| Parsnip | — | Apr 26 | — | Jul 21 | Aug 9 – Sep 20 | 100–130 |
| Patty Pan Squash | Apr 5 | May 17 | May 24 | — | Jul 12 – Aug 9 | 45–60 |
| Peas | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Aug 30 | 55–70 |
| Peppers | Mar 1 | May 17 | May 24 | — | Jul 26 – Oct 4 | 60–90 |
| Pole Beans | Mar 15 | May 17 | May 24 | — | Jul 19 – Sep 13 | 55–70 |
| Potatoes | Mar 15 | May 17 | May 24 | — | Aug 2 – Oct 11 | 70–120 |
| Pumpkin | Apr 5 | May 17 | May 24 | — | Aug 23 – Oct 11 | 85–120 |
| Purslane | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 21 – Jul 26 | 40–60 |
| Radicchio | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 12 – Aug 16 | 60–80 |
| Radish | — | Apr 26 | — | Jul 21 | May 24 – Jun 14 | 22–35 |
| Rhubarb | — | — | May 31 | — | — | 365–730 |
| Romanesco | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 26 – Sep 6 | 75–100 |
| Rutabaga | — | Apr 26 | — | Jul 21 | Jul 19 – Aug 23 | 80–100 |
| Salsify | — | Apr 26 | — | Jul 21 | Aug 9 – Sep 20 | 100–130 |
| Savoy Cabbage | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 19 – Sep 13 | 70–110 |
| Scallions | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Aug 2 | 50–70 |
| Scarlet Runner Beans | Mar 15 | May 17 | May 24 | — | Jul 26 – Aug 30 | 60–80 |
| Shallot | Apr 5 | Apr 26 | May 10 | Jul 21 | Aug 9 – Sep 27 | 90–120 |
| Shiso | Mar 22 | May 17 | May 24 | — | Jul 19 – Sep 13 | 50–70 |
| Snap Peas | Mar 15 | May 17 | May 24 | — | Jul 19 – Sep 13 | 55–70 |
| Snow Peas | Apr 5 | Apr 26 | May 10 | Jul 21 | Jul 5 – Aug 30 | 50–65 |
| Soybeans | — | May 17 | — | — | Aug 9 – Oct 4 | 80–120 |
| Spaghetti Squash | Apr 5 | May 17 | May 24 | — | Aug 23 – Sep 20 | 85–100 |
| Spinach | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 14 – Aug 16 | 35–50 |
| Squash (Summer) | Apr 5 | May 17 | May 24 | — | Jul 12 – Sep 13 | 45–65 |
| Squash (Winter) | Apr 5 | May 17 | May 24 | — | Aug 16 – Oct 11 | 80–120 |
| Sunchoke | — | — | May 24 | — | Sep 13 – Nov 8 | 110–150 |
| Sweet Corn | — | May 17 | — | — | Jul 19 – Aug 30 | 60–90 |
| Sweet Potatoes | Mar 15 | May 17 | May 24 | — | Aug 23 – Oct 11 | 90–120 |
| Tatsoi | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 14 – Jul 19 | 35–50 |
| Tomatillo | Mar 15 | May 17 | May 24 | — | Jul 26 – Oct 4 | 60–85 |
| Tomatoes | Mar 15 | May 17 | May 24 | — | Jul 26 – Oct 4 | 60–85 |
| Turnip | — | Apr 26 | — | Jul 21 | Jun 7 – Jul 12 | 40–60 |
| Watercress | Apr 5 | Apr 26 | May 10 | Jul 21 | Jun 21 – Jul 26 | 40–60 |
| Watermelon | Apr 5 | May 17 | May 24 | — | Aug 2 – Sep 20 | 70–100 |
| Wax Beans | — | May 17 | — | — | Jul 12 – Sep 6 | 50–65 |
| Winter Melon | Mar 15 | May 17 | May 24 | — | Aug 23 – Oct 11 | 90–120 |
| Yard Long Beans | Mar 15 | May 17 | May 24 | — | Jul 19 – Aug 30 | 55–80 |
| Zucchini | Apr 5 | May 17 | May 24 | — | Jul 12 – Sep 6 | 45–60 |
🍓 Fruits to Grow in Pullman
27 fruits matched to Zone 6b with planting dates calibrated for Pullman.
Show all 27 fruits with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 31 | — | Aug 30 – Dec 13 | 90–180 |
| Aronia | — | — | May 31 | — | — | 730–1095 |
| Blackberries | — | — | May 31 | — | — | 365–730 |
| Blueberries | — | — | May 31 | — | — | 730–1095 |
| Boysenberries | — | — | May 31 | — | — | 365–730 |
| Cantaloupe | — | — | May 31 | — | Aug 9 – Sep 13 | 70–90 |
| Che Fruit | — | — | May 31 | — | — | 1095–1825 |
| Cranberries | — | — | May 31 | — | — | 730–1095 |
| Currants | — | — | May 31 | — | — | 730–1095 |
| Elderberries | — | — | May 31 | — | — | 730–1095 |
| Goji Berries | — | — | May 31 | — | — | 730–1095 |
| Gooseberries | — | — | May 31 | — | — | 730–1095 |
| Grapes | — | — | May 31 | — | — | 730–1095 |
| Ground Cherry | — | — | May 31 | — | Aug 9 – Oct 4 | 65–80 |
| Hardy Kiwi | — | — | May 31 | — | — | 1095–1825 |
| Haskaps | — | — | May 31 | — | — | 730–1095 |
| Honeydew | — | — | May 31 | — | Aug 23 – Oct 4 | 80–110 |
| Jostaberry | — | — | May 31 | — | — | 730–1095 |
| Lingonberries | — | — | May 31 | — | — | 730–1095 |
| Medlar | — | — | May 31 | — | — | 1095–1825 |
| Mulberries | — | — | May 31 | — | — | 730–1825 |
| Pawpaw | — | — | May 31 | — | — | 1095–2555 |
| Persimmon | — | — | May 31 | — | — | 1095–2555 |
| Quince | — | — | May 31 | — | — | 1095–1825 |
| Raspberries | — | — | May 31 | — | — | 365–730 |
| Serviceberries | — | — | May 31 | — | — | 730–1095 |
| Strawberries | — | — | May 31 | — | Aug 30 – Dec 13 | 90–365 |
🌿 Herbs to Grow in Pullman
35 herbs matched to Zone 6b with planting dates calibrated for Pullman.
Show all 35 herbs with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Harvest | Days to Maturity |
|---|---|---|---|---|---|---|
| Angelica | Apr 5 | Apr 26 | May 3 | Jul 21 | — | 365–730 |
| Anise | Apr 5 | Apr 26 | May 3 | Jul 21 | Aug 2 – Oct 18 | 90–120 |
| Basil | Mar 22 | May 17 | May 24 | — | Jul 19 – Sep 20 | 50–75 |
| Bee Balm | — | — | May 17 | — | Aug 16 – Nov 1 | 90–120 |
| Borage | Apr 5 | Apr 26 | May 3 | Jul 21 | Jun 28 – Aug 16 | 50–60 |
| Caraway | Apr 5 | Apr 26 | May 3 | Jul 21 | — | 365–450 |
| Catnip | — | — | May 17 | — | Jul 19 – Sep 20 | 60–80 |
| Chamomile | Apr 5 | Apr 26 | May 3 | Jul 21 | Jul 5 – Sep 13 | 60–90 |
| Chervil | Apr 5 | Apr 26 | May 3 | Jul 21 | Jun 14 – Aug 16 | 40–60 |
| Chives | — | — | May 17 | — | Jul 19 – Sep 27 | 60–90 |
| Cilantro | Apr 5 | Apr 26 | May 3 | Jul 21 | Jun 14 – Aug 16 | 40–60 |
| Comfrey | — | — | May 17 | — | Jul 19 – Sep 27 | 60–90 |
| Cumin | Apr 5 | Apr 26 | May 3 | Jul 21 | Aug 16 – Oct 18 | 100–120 |
| Dill | Apr 5 | Apr 26 | May 3 | Jul 21 | Jun 14 – Aug 16 | 40–60 |
| Epazote | Mar 22 | May 17 | May 24 | — | Jul 12 – Sep 6 | 45–60 |
| Fennel (herb) | Apr 5 | Apr 26 | May 3 | Jul 21 | Jul 5 – Sep 13 | 60–90 |
| Feverfew | — | — | May 17 | — | Aug 16 – Nov 1 | 90–120 |
| Garlic Chives | — | — | May 17 | — | Jul 19 – Sep 27 | 60–90 |
| Horehound | — | — | May 17 | — | Aug 2 – Sep 27 | 75–90 |
| Hyssop | — | — | May 17 | — | Jul 26 – Sep 27 | 70–90 |
| Lemon Balm | — | — | May 17 | — | Jul 19 – Sep 6 | 60–70 |
| Lemon Thyme | — | — | May 17 | — | Jul 26 – Sep 27 | 70–90 |
| Lovage | — | — | May 17 | — | Jul 26 – Sep 27 | 70–90 |
| Marjoram | — | — | May 17 | — | Jul 19 – Sep 27 | 60–90 |
| Mint | — | — | May 17 | — | Jul 19 – Sep 27 | 60–90 |
| Oregano | — | — | May 17 | — | Jul 19 – Sep 27 | 60–90 |
| Parsley | Apr 5 | Apr 26 | May 3 | Jul 21 | Jul 5 – Sep 6 | 60–80 |
| Rue | — | — | May 17 | — | Jul 26 – Sep 27 | 70–90 |
| Sage | — | — | May 17 | — | Aug 2 – Sep 27 | 75–90 |
| Savory | — | — | May 17 | — | Jul 12 – Sep 6 | 50–70 |
| Sorrel | Apr 5 | Apr 26 | May 3 | Jul 21 | Jun 14 – Aug 16 | 40–60 |
| Tarragon | — | — | May 17 | — | Jul 19 – Sep 27 | 60–90 |
| Thai Basil | Mar 22 | May 17 | May 24 | — | Jul 19 – Sep 20 | 50–75 |
| Thyme | — | — | May 17 | — | Jul 26 – Sep 27 | 70–90 |
| Valerian | — | — | May 17 | — | Sep 20 – Nov 29 | 120–180 |
🌸 Flowers to Grow in Pullman
53 flowers matched to Zone 6b with planting dates calibrated for Pullman.
Show all 53 flowers with dates
| Plant | Start Indoors | Direct Sow | Transplant | Fall Plant | Bloom | Days to Maturity |
|---|---|---|---|---|---|---|
| Ageratum | Mar 22 | May 10 | May 10 | — | Jul 5 – Oct 18 | 60–75 |
| Alliums | — | — | — | Aug 18 | Sep 15 – Oct 13 | 28–42 |
| Anemones | Apr 12 | — | May 10 | — | Jun 7 – Jul 5 | 90–120 |
| Astilbe | Mar 8 | — | May 17 | — | Jul 26 – Oct 4 | 70–100 |
| Bachelor's Button | Mar 29 | Apr 12 | May 10 | Aug 18 | Jul 12 – Oct 4 | 60–90 |
| Begonias | Mar 1 | — | May 17 | — | Jul 26 – Nov 1 | 70–90 |
| Black-eyed Susan | Mar 8 | May 10 | May 17 | — | Aug 2 – Nov 22 | 60–80 |
| Bleeding Hearts | Mar 8 | — | May 17 | — | Jul 12 – Aug 16 | 60–90 |
| Calendula | Mar 29 | Apr 12 | May 10 | — | Jun 28 – Oct 4 | 50–70 |
| California Poppy | — | Apr 12 | — | — | Jun 21 – Aug 16 | 60–90 |
| Celosia | Apr 5 | May 17 | May 17 | — | Jul 19 – Nov 8 | 60–90 |
| Columbine | Mar 8 | May 17 | May 17 | — | Jul 12 – Aug 16 | 70–100 |
| Coreopsis | Mar 8 | May 10 | May 17 | — | Jul 26 – Nov 22 | 60–80 |
| Cosmos | Apr 12 | May 10 | May 10 | — | Jul 19 – Nov 1 | 60–90 |
| Crocus | — | — | — | Aug 18 | Jul 7 – Jul 28 | 10–20 |
| Daffodils | — | — | — | Aug 18 | Jul 14 – Aug 4 | 20–40 |
| Dahlias | Apr 12 | May 17 | May 17 | — | Aug 2 – Nov 22 | 70–120 |
| Daylily | Mar 8 | — | May 17 | — | Aug 2 – Nov 22 | 60–90 |
| Dianthus | Mar 15 | Apr 12 | Apr 19 | — | Jun 7 – Sep 6 | 60–80 |
| Echinacea (Purple Coneflower) | Mar 8 | May 17 | May 17 | — | Aug 2 – Nov 22 | 70–90 |
| Foxglove | Mar 8 | May 17 | May 17 | — | Jul 12 – Aug 16 | 80–120 |
| Gaillardia (Blanket Flower) | Mar 22 | May 17 | May 17 | — | Jul 26 – Nov 29 | 70–100 |
| Geraniums | Mar 1 | — | May 17 | — | Jul 26 – Nov 1 | 70–100 |
| Gladiolus | — | May 10 | May 10 | — | Jul 26 – Nov 15 | 70–100 |
| Hostas | Mar 1 | — | May 17 | — | Aug 2 – Nov 22 | 60–90 |
| Hyacinths | — | — | — | Aug 18 | Aug 4 – Aug 25 | 14–28 |
| Hydrangeas | Mar 1 | — | May 17 | — | Jul 26 – Nov 8 | 90–150 |
| Impatiens | Mar 15 | — | May 17 | — | Jul 26 – Nov 8 | 60–75 |
| Irises | — | Division | May 17 | — | Jul 12 – Aug 9 | 60–100 |
| Larkspur | — | Apr 12 | — | — | Jun 21 – Aug 16 | 60–90 |
| Lavender | Mar 1 | — | May 24 | — | Aug 2 – Sep 27 | 90–120 |
| Lilies | — | Division | May 17 | — | Jul 26 – Nov 1 | 70–120 |
| Lobelia | Mar 8 | — | Apr 26 | — | Jun 21 – Sep 13 | 70–80 |
| Lupine | Mar 8 | May 17 | May 17 | — | Jul 12 – Aug 16 | 75–100 |
| Marigolds | Mar 29 | May 10 | May 10 | — | Jul 5 – Oct 11 | 50–70 |
| Nasturtium | Apr 12 | May 10 | May 10 | — | Jul 5 – Nov 1 | 55–65 |
| Pansy | Mar 1 | — | May 10 | Aug 4 | Jul 5 – Sep 13 | 70–90 |
| Peonies | — | Division | May 17 | — | Jul 19 – Aug 23 | 90–120 |
| Petunia | Mar 15 | — | May 17 | — | Jul 26 – Nov 8 | 70–90 |
| Phlox | Mar 8 | May 17 | May 17 | — | Jul 26 – Oct 18 | 80–110 |
| Portulaca | Apr 5 | May 17 | May 17 | — | Jul 5 – Oct 25 | 50–70 |
| Ranunculus | Mar 29 | — | May 10 | — | Jun 14 – Jul 12 | 90–120 |
| Roses | Mar 1 | — | May 17 | — | Jul 26 – Nov 22 | 90–180 |
| Salvia | Mar 8 | — | May 10 | — | Jul 19 – Nov 1 | 70–90 |
| Sedum (Stonecrop) | Mar 8 | — | May 17 | — | Sep 6 – Nov 29 | 60–90 |
| Snapdragon | Mar 1 | Apr 19 | May 10 | — | Jul 19 – Oct 4 | 70–100 |
| Sunflower | Apr 19 | May 10 | May 10 | — | Aug 2 – Nov 1 | 70–100 |
| Sweet Alyssum | Mar 29 | Apr 19 | May 10 | — | Jun 21 – Sep 6 | 45–60 |
| Sweet Pea | Mar 29 | Apr 5 | May 10 | — | Jul 26 – Oct 4 | 65–85 |
| Tulips | — | — | — | Aug 25 | Aug 4 – Sep 1 | 15–30 |
| Vinca (Annual) | Mar 1 | — | May 17 | — | Jul 26 – Nov 8 | 70–90 |
| Yarrow | Mar 8 | May 10 | May 17 | — | Jul 26 – Nov 22 | 60–90 |
| Zinnia | Apr 12 | May 10 | May 10 | — | Jul 19 – Oct 25 | 60–70 |
Monthly Planting Guide for Pullman
ZIP Codes in Pullman
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 Whitman County.
Your Whitman County Garden Planner — Free
A 22-page printable planner built for Whitman County (Zone 6b). 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