Prince William County, VA — Planting Guide
Prince William County is in USDA Zone 7a. The average last spring frost is April 13 and the first fall frost is October 26, giving you a growing season of approximately 196 days.
At an elevation of 372 ft, Prince William County receives approximately 46.2 in of rainfall annually. Summer highs average 89°F with winter lows around 33°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 19 in warm years to May 8 in cold years. The growing season is trending longer by about 4.99 days per decade. Prince William County scores 62/100 (Good) on the Microclimate Index.
🌡️ Zone
7a (0°F to 5°F min)
❄️ Last Frost
April 13
🍂 First Frost
October 26
📅 Growing Season
196 days
⛰️ Elevation
372 ft
🌧️ Annual Rainfall
46.2 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 | 4.5 in | 10 days | — | None |
| Feb | 4.2 in | 8 days | — | None |
| Mar | 3.8 in | 10 days | 0.5 in | Low |
| Apr | 3.5 in | 8 days | 0.8 in | Moderate |
| May | 4.1 in | 9 days | 0.2 in | Low |
| Jun | 4.1 in | 9 days | 0.2 in | Low |
| Jul | 4.6 in | 12 days | — | Low |
| Aug | 4.1 in | 10 days | 0.2 in | Low |
| Sep | 3.1 in | 7 days | 1.2 in | Moderate |
| Oct | 2.8 in | 6 days | 1.5 in | Moderate |
| Nov | 3.2 in | 6 days | — | None |
| Dec | 4.1 in | 10 days | — | None |
Annual total: 46.1 in. Gardens typically need ~1 inch of water per week during the growing season. Months marked "None" for extra water are outside the active growing season for your zone — most gardens are dormant and don't need irrigation during those months.
Prince William County Soil Profile
Soil Type
Silt Loam
Soil pH
5.8-7
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) | May 8 | Nov 23 | 199 days |
| Cautious | Apr 21 | Nov 9 | 202 days |
| Average year | Apr 13 | Oct 26 | 196 days |
| Optimistic | Apr 1 | Oct 18 | 200 days |
| Aggressive (risky) | Mar 19 | Oct 10 | 205 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 5 days per decade). Spring is arriving earlier than it used to. Good news for gardeners.
Gardening Difficulty Score
Prince William County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Prince William 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 Prince William County's climate and soil.
County Extension Office
Prince William County Virginia Cooperative Extension (Virginia Tech / Virginia State) Extension Office
Phone: 540-231-5299
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 Prince William County
Finding local nurseries & garden centers in Prince William County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Prince William 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 Prince William County VA" or "garden center Prince William 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 Prince William County VA" or check your extension office and local parks department. Facebook groups like "Prince William County Gardeners" or "Virginia 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
14.7 hours
Summer solstice daylight
Shortest Day
9.3 hours
Winter solstice daylight
Peak Sun Hours
8.6 hr/day peak (summer)
Peak sun hours (green dashed line below) account for cloud cover — this is the usable direct sunlight your garden actually receives. Most vegetables need 6+ peak sun hours.
Onion tip: Your long summer days (14+ hours) support long-day onion varieties like Walla Walla, Sweet Spanish, and Ailsa Craig.
View detailed monthly data
| Month | Daylight Hours | Peak Sun Hours | Day Length |
|---|---|---|---|
| January | 9.6 hr | 5 hr | Short day |
| February | 10.5 hr | 5.6 hr | Short day |
| March | 11.7 hr | 6.7 hr | Short day |
| April | 13 hr | 7.7 hr | Neutral |
| May | 14.1 hr | 8.3 hr | Long day |
| June | 14.7 hr | 8.6 hr | Long day |
| July | 14.5 hr | 7.9 hr | Long day |
| August | 13.5 hr | 7.6 hr | Neutral |
| September | 12.2 hr | 7.3 hr | Neutral |
| October | 11 hr | 7 hr | Short day |
| November | 9.8 hr | 5.3 hr | Short day |
| December | 9.3 hr | 4.3 hr | Short day |
Peak sun hours factor in typical cloud cover — use these for solar panel and shade-planning calculations.
Soil Temperature & Composting Calendar
Monthly soil temps tell you when to plant warm-season crops, and when your compost pile is actively working.
Plant Warm Crops When
Soil reaches 60°F+
Soil warm enough from May through Oct.
Best Month to Compost
May
Microbial activity peaks when soil is warm.
Active Composting
8 months
Nearly year-round composting.
View detailed monthly data
| Month | Soil 4" Deep | Soil 8" Deep | Compost Activity | Time to Finish |
|---|---|---|---|---|
| Jan | 40°F | 46°F | ❄️ Dormant | ~36 weeks |
| Feb | 40°F | 44°F | 🐢 Slow | ~24 weeks |
| Mar | 44°F | 49°F | 🐢 Slow | ~24 weeks |
| Apr | 57°F | 57°F | ♻️ Active | ~14 weeks |
| May | 69°F | 66°F | 🔥 Peak | ~8 weeks |
| Jun | 77°F | 72°F | 🔥 Peak | ~8 weeks |
| Jul | 85°F | 80°F | 🔥 Peak | ~8 weeks |
| Aug | 85°F | 81°F | 🔥 Peak | ~8 weeks |
| Sep | 79°F | 78°F | 🔥 Peak | ~8 weeks |
| Oct | 68°F | 71°F | 🔥 Peak | ~8 weeks |
| Nov | 54°F | 59°F | ♻️ Active | ~14 weeks |
| Dec | 45°F | 53°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 Prince William 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 |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | Moderate | May, Jun, Jul |
| Stink bugs | High | May, Jun, Jul, Aug, Sep |
| Whiteflies | Low | Jun, Jul, Aug, Sep |
| Spider mites | Moderate | Jul, Aug |
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 Prince William County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
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 27 | Mar 23 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 18 | Mar 30 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Aug 28 | Mar 23 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Aug 1 | Mar 23 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 15 | Mar 23 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 26 | Mar 30 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 20 | Mar 23 | — | Erosion control, weed suppression, good biomass |
Spring Cover Crops (4 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | Apr 15 | Aug 31 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Cowpeas (southern peas) | Apr 20 | Aug 31 | ✓ Yes | Excellent nitrogen fixer for warm climates, edible |
| Sorghum-sudan grass | Apr 19 | Aug 31 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 13 | Aug 31 | ✓ 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 | Apr 26 | Sep 28 | — | Deep roots break compaction, attract pollinators and beneficial insects |
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: 9 mph Winter: 11 mph
Prevailing wind: SW. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
4.5/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Moderate
Some terrain variation (418 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
22,976 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 750 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Jan, Feb, May, Jul
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Sep, Oct, Nov
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 46.1 inches of rain per year
- A 1,000 sq ft roof can collect roughly 22,976 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Sep, Oct, Nov)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Prince William County
Soil Type
Silt Loam
Soil pH 5.8–7 · Moderately Well Drained drainage
Good candidate for raised beds to maximise drainage and extend the season.
Watering Needs
Drought stress: 1.5/10
Prince William County has very low drought pressure. Natural rainfall usually meets garden needs — water only during extended dry spells.
Season Tips
196-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 Prince William County
113 vegetables that grow well in Zone 7a with planting dates for Prince William County.
Show all 113 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Amaranth | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Artichoke | — | — | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Arugula | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 30–50 |
| Asparagus | — | — | Apr 27 | — | 730–1095 |
| Beets | — | Mar 30 | — | May 25 – Jun 22 | 50–70 |
| Belgian Endive | Mar 9 | Mar 30 | Apr 13 | Aug 3 – Sep 28 | 110–150 |
| Bitter Melon | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 10 | 60–90 |
| Black Beans | — | Apr 20 | — | Jul 20 – Sep 7 | 90–120 |
| Bok Choy | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Broccoli | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–90 |
| Broccoli Rabe | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Brussels Sprouts | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Sep 7 | 90–130 |
| Butternut Squash | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 31 | 85–110 |
| Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Aug 10 | 60–100 |
| Calabash | Feb 23 | Apr 20 | Apr 27 | Jul 20 – Sep 14 | 80–120 |
| Cardoon | — | — | Apr 27 | Aug 31 – Oct 12 | 120–150 |
| Carrots | — | Mar 30 | — | Jun 1 – Jul 6 | 60–80 |
| Cauliflower | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 10 | 55–100 |
| Celeriac | Mar 9 | Mar 30 | Apr 13 | Jul 27 – Aug 31 | 100–120 |
| Celery | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 31 | 80–120 |
| Celtuce | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–90 |
| Chard | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 27 | 50–60 |
| Chayote | Feb 23 | Apr 20 | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Chickpeas | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 17 | 80–110 |
| Chicory | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 27 | 60–85 |
| Chinese Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Christmas Lima Beans | Feb 23 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Collard Greens | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 10 | 55–75 |
| Corn | — | Apr 20 | — | Jun 22 – Aug 17 | 60–100 |
| Cowpeas | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Cress | Mar 9 | Mar 30 | Apr 13 | Apr 27 – May 18 | 14–21 |
| Crookneck Squash | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Jul 13 | 45–60 |
| Crosne | — | Mar 30 | — | Aug 31 – Nov 2 | 150–200 |
| Cucumber | Mar 16 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–70 |
| Daikon | — | Mar 30 | — | May 25 – Jun 22 | 50–70 |
| Delicata Squash | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Aug 24 | 80–100 |
| Edamame | — | Apr 20 | — | Jul 6 – Aug 17 | 75–100 |
| Eggplant | Feb 9 | Apr 20 | Apr 27 | Jul 6 – Sep 7 | 65–85 |
| Endive | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jul 6 | 45–65 |
| Escarole | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Fava Beans | Mar 9 | Mar 30 | Apr 13 | Jun 29 – Aug 10 | 75–100 |
| Fennel | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 10 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Apr 20 | — | Jun 15 – Aug 10 | 50–65 |
| Horseradish | — | — | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Hot Peppers | Feb 9 | Apr 20 | Apr 27 | Jul 6 – Oct 12 | 70–120 |
| Hubbard Squash | Mar 16 | Apr 20 | Apr 27 | Aug 10 – Sep 14 | 100–120 |
| Jicama | Feb 23 | Apr 20 | Apr 27 | Aug 31 – Nov 9 | 120–180 |
| Kabocha | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 24 | 85–100 |
| Kai Lan | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jun 29 | 45–60 |
| Kale | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 50–70 |
| Kidney Beans | — | Apr 20 | — | Jul 20 – Aug 24 | 85–110 |
| Kohlrabi | Mar 9 | Mar 30 | Apr 13 | Jun 1 – Jul 6 | 45–65 |
| Komatsuna | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 22 | 35–50 |
| Leeks | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Sep 28 | 90–150 |
| Lentils | Mar 9 | Mar 30 | Apr 13 | Jul 6 – Aug 17 | 80–110 |
| Lettuce | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 27 | 30–60 |
| Lima Beans | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Loofah | Feb 23 | Apr 20 | Apr 27 | Aug 10 – Oct 12 | 100–150 |
| Luffa | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Oct 12 | 90–150 |
| Mache | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Malabar Spinach | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Jul 20 | 55–70 |
| Melon | Mar 16 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Microgreens | Mar 9 | Mar 30 | Apr 13 | Apr 20 – May 18 | 7–21 |
| Mitsuba | Mar 9 | Mar 30 | Apr 6 | Jun 1 – Jul 27 | 50–70 |
| Mizuna | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 15 | 30–45 |
| Mustard Greens | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 30–50 |
| Napa Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 13 | 55–75 |
| New Zealand Spinach | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Jul 20 | 55–70 |
| Okra | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–65 |
| Onion | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Aug 31 | 90–120 |
| Pac Choi | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 22 | 40–55 |
| Parsnip | — | Mar 30 | — | Jul 13 – Aug 24 | 100–130 |
| Patty Pan Squash | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Jul 13 | 45–60 |
| Peas | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 55–70 |
| Peppers | Feb 9 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–90 |
| Pole Beans | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 55–70 |
| Potatoes | Feb 23 | Apr 20 | Apr 27 | Jul 6 – Sep 14 | 70–120 |
| Pumpkin | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 85–120 |
| Purslane | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Radicchio | Mar 9 | Mar 30 | Apr 13 | Jun 15 – Jul 20 | 60–80 |
| Radish | — | Mar 30 | — | Apr 27 – May 18 | 22–35 |
| Rhubarb | — | — | May 4 | — | 365–730 |
| Romanesco | Mar 9 | Mar 30 | Apr 13 | Jun 29 – Aug 10 | 75–100 |
| Rutabaga | — | Mar 30 | — | Jun 22 – Jul 27 | 80–100 |
| Salsify | — | Mar 30 | — | Jul 13 – Aug 24 | 100–130 |
| Savoy Cabbage | Mar 9 | Mar 30 | Apr 13 | Jun 22 – Aug 17 | 70–110 |
| Scallions | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Jul 6 | 50–70 |
| Scarlet Runner Beans | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Aug 3 | 60–80 |
| Shallot | Mar 9 | Mar 30 | Apr 13 | Jul 13 – Aug 31 | 90–120 |
| Shiso | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 50–70 |
| Snap Peas | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 17 | 55–70 |
| Snow Peas | Mar 9 | Mar 30 | Apr 13 | Jun 8 – Aug 3 | 50–65 |
| Soybeans | — | Apr 20 | — | Jul 13 – Sep 7 | 80–120 |
| Spaghetti Squash | Mar 16 | Apr 20 | Apr 27 | Jul 27 – Aug 24 | 85–100 |
| Spinach | Mar 9 | Mar 30 | Apr 13 | May 18 – Jul 20 | 35–50 |
| Squash (Summer) | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Aug 17 | 45–65 |
| Squash (Winter) | Mar 16 | Apr 20 | Apr 27 | Jul 20 – Sep 14 | 80–120 |
| Sunchoke | — | — | Apr 27 | Aug 17 – Oct 12 | 110–150 |
| Sunflower | Feb 23 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Sweet Corn | — | Apr 20 | — | Jun 22 – Aug 3 | 60–90 |
| Sweet Potatoes | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Tatsoi | Mar 9 | Mar 30 | Apr 13 | May 18 – Jun 22 | 35–50 |
| Tomatillo | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–85 |
| Tomatoes | Feb 23 | Apr 20 | Apr 27 | Jun 29 – Sep 7 | 60–85 |
| Turnip | — | Mar 30 | — | May 11 – Jun 15 | 40–60 |
| Watercress | Mar 9 | Mar 30 | Apr 13 | May 25 – Jun 29 | 40–60 |
| Watermelon | Mar 16 | Apr 20 | Apr 27 | Jul 6 – Aug 24 | 70–100 |
| Wax Beans | — | Apr 20 | — | Jun 15 – Aug 10 | 50–65 |
| Winter Melon | Feb 23 | Apr 20 | Apr 27 | Jul 27 – Sep 14 | 90–120 |
| Yard Long Beans | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 3 | 55–80 |
| Zucchini | Mar 16 | Apr 20 | Apr 27 | Jun 15 – Aug 10 | 45–60 |
🍓 Fruits to Grow in Prince William County
31 fruits that grow well in Zone 7a with planting dates for Prince William County.
Show all 31 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 4 | Aug 3 – Nov 16 | 90–180 |
| Aronia | — | — | May 4 | — | 730–1095 |
| Blackberries | — | — | May 4 | — | 365–730 |
| Blueberries | — | — | May 4 | — | 730–1095 |
| Boysenberries | — | — | May 4 | — | 365–730 |
| Cantaloupe | — | — | May 4 | Jul 13 – Aug 17 | 70–90 |
| Che Fruit | — | — | May 4 | — | 1095–1825 |
| Cranberries | — | — | May 4 | — | 730–1095 |
| Currants | — | — | May 4 | — | 730–1095 |
| Elderberries | — | — | May 4 | — | 730–1095 |
| Figs | — | — | May 4 | — | 730–1825 |
| Goji Berries | — | — | May 4 | — | 730–1095 |
| Gooseberries | — | — | May 4 | — | 730–1095 |
| Grapes | — | — | May 4 | — | 730–1095 |
| Ground Cherry | — | — | May 4 | Jul 13 – Sep 7 | 65–80 |
| Hardy Kiwi | — | — | May 4 | — | 1095–1825 |
| Haskaps | — | — | May 4 | — | 730–1095 |
| Honeydew | — | — | May 4 | Jul 27 – Sep 7 | 80–110 |
| Jostaberry | — | — | May 4 | — | 730–1095 |
| Kiwi | — | — | May 4 | — | 1095–1825 |
| Lingonberries | — | — | May 4 | — | 730–1095 |
| Loquat | — | — | May 4 | — | 730–1825 |
| Medlar | — | — | May 4 | — | 1095–1825 |
| Mulberries | — | — | May 4 | — | 730–1825 |
| Pawpaw | — | — | May 4 | — | 1095–2555 |
| Persimmon | — | — | May 4 | — | 1095–2555 |
| Pomegranate | — | — | May 4 | — | 730–1095 |
| Quince | — | — | May 4 | — | 1095–1825 |
| Raspberries | — | — | May 4 | — | 365–730 |
| Serviceberries | — | — | May 4 | — | 730–1095 |
| Strawberries | — | — | May 4 | Aug 3 – Dec 14 | 90–365 |
🌿 Herbs to Grow in Prince William County
39 herbs that grow well in Zone 7a with planting dates for Prince William County.
Show all 39 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 9 | Mar 30 | Apr 6 | — | 365–730 |
| Anise | Mar 9 | Mar 30 | Apr 6 | Jul 6 – Sep 21 | 90–120 |
| Basil | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 24 | 50–75 |
| Bee Balm | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
| Borage | Mar 9 | Mar 30 | Apr 6 | Jun 1 – Jul 20 | 50–60 |
| Caraway | Mar 9 | Mar 30 | Apr 6 | — | 365–450 |
| Catnip | — | — | Apr 20 | Jun 22 – Aug 24 | 60–80 |
| Chamomile | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Chervil | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Chives | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Cilantro | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Comfrey | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Cumin | Mar 9 | Mar 30 | Apr 6 | Jul 20 – Sep 21 | 100–120 |
| Dill | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Echinacea | — | — | Apr 20 | Aug 24 – Nov 30 | 120–180 |
| Epazote | Feb 23 | Apr 20 | Apr 27 | Jun 15 – Aug 10 | 45–60 |
| Fennel (herb) | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 17 | 60–90 |
| Feverfew | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
| Garlic Chives | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Horehound | — | — | Apr 20 | Jul 6 – Aug 31 | 75–90 |
| Hyssop | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Lavender | — | — | Apr 20 | Jul 20 – Nov 30 | 90–200 |
| Lemon Balm | — | — | Apr 20 | Jun 22 – Aug 10 | 60–70 |
| Lemon Thyme | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Lovage | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Marjoram | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Mint | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Oregano | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Parsley | Mar 9 | Mar 30 | Apr 6 | Jun 8 – Aug 10 | 60–80 |
| Rosemary | — | — | Apr 20 | Jul 13 – Nov 30 | 80–180 |
| Rue | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Sage | — | — | Apr 20 | Jul 6 – Aug 31 | 75–90 |
| Savory | — | — | Apr 20 | Jun 15 – Aug 10 | 50–70 |
| Sorrel | Mar 9 | Mar 30 | Apr 6 | May 18 – Jul 20 | 40–60 |
| Tarragon | — | — | Apr 20 | Jun 22 – Aug 31 | 60–90 |
| Thai Basil | Feb 23 | Apr 20 | Apr 27 | Jun 22 – Aug 24 | 50–75 |
| Thyme | — | — | Apr 20 | Jun 29 – Aug 31 | 70–90 |
| Valerian | — | — | Apr 20 | Aug 24 – Nov 30 | 120–180 |
| Yarrow | — | — | Apr 20 | Jul 20 – Oct 5 | 90–120 |
Monthly Planting Guide for Prince William County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Prince William County.
Frequently Asked Questions
What planting zone is Prince William County, VA?
Prince William County is in USDA Hardiness Zone 7a. 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 Prince William County, VA?
Based on 31 years of NOAA weather station data, the median last spring frost in Prince William County falls around April 13. In 8 out of 10 years, last frost lands between March 19 and May 8 — a 50-day window of variability. Use May 8 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Prince William County, VA?
The median first fall frost in Prince William County arrives around October 26. In cold years it can arrive as early as October 10; in mild years as late as November 23. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Prince William County?
Prince William County has a frost-free growing season of approximately 196 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 4.99 days per decade.
What is the soil like in Prince William County for gardening?
Prince William County has predominantly Silt Loam soil with a pH range of 5.8–7 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Prince William County?
Prince William County has commercial agriculture that includes Soybeans, Corn, Hay, Poultry. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Prince William County a good location for home gardening?
Prince William County scores 62/100 (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 Prince William County gardeners in Zone 7a 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.
