Dauphin County, PA — Planting Guide
Dauphin County is in USDA Zone 6b. The average last spring frost is April 21 and the first fall frost is October 22, giving you a growing season of approximately 184 days.
At an elevation of 1,024 ft, Dauphin County receives approximately 48.9 in of rainfall annually. Summer highs average 88°F with winter lows around 26°F. The predominant soil type is Silt Loam.
Based on 31 years of NOAA climate station data, the last frost date here varies by 33 days year to year — ranging from April 6 in warm years to May 9 in cold years. Dauphin County scores 76/100 (Good) on the Microclimate Index.
🌡️ Zone
6b (-5°F to 0°F min)
❄️ Last Frost
April 21
🍂 First Frost
October 22
📅 Growing Season
184 days
⛰️ Elevation
1,024 ft
🌧️ Annual Rainfall
48.9 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 | 3.5 in | 9 days | — | None |
| Feb | 3.7 in | 8 days | — | None |
| Mar | 4.3 in | 10 days | — | Low |
| Apr | 3.9 in | 11 days | 0.4 in | Low |
| May | 4.2 in | 10 days | 0.1 in | Low |
| Jun | 4.9 in | 12 days | — | Low |
| Jul | 4.4 in | 10 days | — | Low |
| Aug | 4.8 in | 9 days | — | Low |
| Sep | 4.3 in | 9 days | — | Low |
| Oct | 3.4 in | 8 days | 0.9 in | Moderate |
| Nov | 3.3 in | 11 days | — | None |
| Dec | 4 in | 11 days | — | None |
Annual total: 48.7 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.
Dauphin County Soil Profile
Soil Type
Silt Loam
Soil pH
5-6.2
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 9 | Nov 2 | 177 days |
| Cautious | Apr 27 | Oct 27 | 183 days |
| Average year | Apr 21 | Oct 22 | 184 days |
| Optimistic | Apr 14 | Oct 18 | 187 days |
| Aggressive (risky) | Apr 6 | Oct 12 | 189 days |
Not very — frost dates can vary by ±33 days year-to-year. Use the "Conservative" row in the table below, and keep row covers handy for surprise late frosts.
Gardening Difficulty Score
Dauphin County offers good growing conditions. A little planning around frost dates goes a long way.
Local Gardening Help in Dauphin 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 Dauphin County's climate and soil.
County Extension Office
Dauphin County Penn State Extension Extension Office
Phone: 814-865-4028
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 Dauphin County
Finding local nurseries & garden centers in Dauphin County
Why Buy Local
Local nurseries carry plants that are proven to grow in your area. Staff can give you advice specific to Dauphin 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 Dauphin County PA" or "garden center Dauphin 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 Dauphin County PA" or check your extension office and local parks department. Facebook groups like "Dauphin County Gardeners" or "Pennsylvania 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
14.9 hours
Summer solstice daylight
Shortest Day
9.1 hours
Winter solstice daylight
Peak Sun Hours
8.2 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 | 9.4 hr | 3.6 hr | Short day |
| February | 10.5 hr | 4.2 hr | Short day |
| March | 11.7 hr | 5.5 hr | Short day |
| April | 13.1 hr | 6 hr | Neutral |
| May | 14.2 hr | 7.5 hr | Long day |
| June | 14.9 hr | 8 hr | Long day |
| July | 14.6 hr | 8.2 hr | Long day |
| August | 13.6 hr | 7.5 hr | Neutral |
| September | 12.3 hr | 6.3 hr | Neutral |
| October | 10.9 hr | 5.1 hr | Short day |
| November | 9.7 hr | 3.8 hr | Short day |
| December | 9.1 hr | 3.3 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
Jun
Microbial activity peaks when soil is warm.
Active Composting
7 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 | 31°F | 38°F | ❄️ Dormant | ~36 weeks |
| Feb | 34°F | 36°F | ❄️ Dormant | ~36 weeks |
| Mar | 40°F | 41°F | 🐢 Slow | ~24 weeks |
| Apr | 50°F | 51°F | ♻️ Active | ~14 weeks |
| May | 62°F | 59°F | ♻️ Active | ~14 weeks |
| Jun | 75°F | 70°F | 🔥 Peak | ~8 weeks |
| Jul | 80°F | 76°F | 🔥 Peak | ~8 weeks |
| Aug | 83°F | 77°F | 🔥 Peak | ~8 weeks |
| Sep | 76°F | 75°F | 🔥 Peak | ~8 weeks |
| Oct | 61°F | 65°F | ♻️ Active | ~14 weeks |
| Nov | 48°F | 56°F | 🐢 Slow | ~24 weeks |
| Dec | 39°F | 46°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 Dauphin 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
Moderate — watch for mildew and blight during wet periods.
Seasonal Risk
View 6 common pests in your area
| Pest | Risk Level | Peak Months |
|---|---|---|
| Aphids | High | Apr, May, Jun, Jul, Aug, Sep |
| Japanese beetles | Moderate | Jun, Jul, Aug |
| Squash vine borers | Moderate | Jun, Jul |
| Tomato hornworms | Moderate | Jun, Jul, Aug |
| Cucumber beetles | Low | May, Jun, Jul |
| Stink bugs | Moderate | Jun, Jul, Aug, Sep |
Organic pest management tips
- Use row covers on susceptible crops during peak pest months
- Apply neem oil preventatively every 7-14 days during active pest season
- Interplant with strong-scented herbs (basil, marigold) to confuse pests
- Hand-pick larger pests (beetles, caterpillars) in early morning when they're sluggish
- Practice crop rotation — never plant the same family in the same spot within 3 years
Cover Crops for Dauphin County
Cover crops protect bare soil, fix nitrogen, suppress weeds, and improve soil structure — with county-specific planting dates.
Spring Cover Crops (3 options) — Build soil before the main growing season
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Buckwheat | May 2 | Aug 27 | — | Rapid growth, attracts pollinators, suppresses weeds |
| Sorghum-sudan grass | May 3 | Aug 13 | — | Massive biomass, breaks compaction, suppresses nematodes |
| White clover | Mar 22 | Aug 13 | ✓ 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 7 | Oct 1 | — | Deep roots break compaction, attract pollinators and beneficial insects |
Fall Cover Crops (7 options) — Plant after harvest to protect soil over winter
| Crop | Plant By | Terminate | N-Fixing | Soil Benefit |
|---|---|---|---|---|
| Austrian winter peas | Aug 28 | Mar 31 | ✓ Yes | Fixes nitrogen, good for heavy clay soils |
| Crimson clover | Aug 20 | Apr 7 | ✓ Yes | Fixes nitrogen, attracts pollinators in spring |
| Daikon radish | Sep 9 | Mar 31 | — | Deep taproot breaks compaction, excellent for clay soils |
| Hairy vetch | Jul 30 | Apr 7 | ✓ Yes | Excellent nitrogen fixer, good for depleted soils |
| Oats | Sep 13 | Apr 7 | — | Quick biomass, winterkills in cold zones — no spring tillage needed |
| Winter rye | Jul 27 | Apr 7 | — | Suppresses weeds, prevents erosion, breaks up compacted soil |
| Winter wheat | Jul 27 | Mar 31 | — | Erosion control, weed suppression, good biomass |
Wind & Microclimate
Wind dries soil, stresses plants, and affects frost patterns. Understanding your exposure helps with garden placement.
Seasonal Wind Speed
Spring: 11 mph Summer: 7 mph
Fall: 10 mph Winter: 11 mph
Prevailing wind: W. Moderate wind — consider a temporary windbreak for young seedlings.
Windbreak Benefit
5.2/10
Moderately beneficial — a simple fence or trellis can protect delicate crops from wind stress.
Frost Pocket Risk
Low
Relatively flat terrain (326 ft range). Frost pocket risk is minimal — garden placement is flexible.
Rainwater Harvesting Potential
How much water you can collect, when to collect it, and what size system you need for your garden.
Annual Collection
24,272 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 500 gal tank.
Legal Status
Unrestricted
Rainwater harvesting is fully legal in your state with no restrictions.
Best Collection Months
Mar, Jun, Jul, Aug
Highest rainfall months — your barrels will fill up quickly during these months.
Months to Draw From Storage
Jan, 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 48.7 inches of rain per year
- A 1,000 sq ft roof can collect roughly 24,272 gallons annually
- Rainwater harvesting is fully legal in your state
- Stock up on stored water before your dry season (Jan, Oct, Nov)
- Use a first-flush diverter to keep roof debris out of your collection
Soil & Growing Conditions in Dauphin County
Soil Type
Silt Loam
Soil pH 5–6.2 · Moderately Well Drained drainage
Good candidate for raised beds to maximise drainage and extend the season.
Watering Needs
Drought stress: 1.5/10
Dauphin County has very low drought pressure. Natural rainfall usually meets garden needs — water only during extended dry spells.
Season Tips
184-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 Dauphin County
108 vegetables that grow well in Zone 6b with planting dates for Dauphin County.
Show all 108 vegetables with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Acorn Squash | Mar 17 | Apr 28 | May 5 | Jul 28 – Sep 1 | 80–100 |
| Amaranth | Feb 24 | Apr 28 | May 5 | Aug 4 – Sep 22 | 90–120 |
| Arugula | Mar 17 | Apr 7 | Apr 21 | May 26 – Jul 28 | 30–50 |
| Asparagus | — | — | May 5 | — | 730–1095 |
| Beets | — | Apr 7 | — | Jun 2 – Jun 30 | 50–70 |
| Belgian Endive | Mar 17 | Apr 7 | Apr 21 | Aug 11 – Oct 6 | 110–150 |
| Bitter Melon | Feb 24 | Apr 28 | May 5 | Jul 7 – Aug 18 | 60–90 |
| Black Beans | — | Apr 28 | — | Jul 28 – Sep 15 | 90–120 |
| Bok Choy | Mar 17 | Apr 7 | Apr 21 | Jun 2 – Jul 7 | 40–60 |
| Broccoli | Mar 17 | Apr 7 | Apr 21 | Jun 23 – Aug 4 | 60–90 |
| Broccoli Rabe | Mar 17 | Apr 7 | Apr 21 | Jun 2 – Jul 7 | 40–60 |
| Brussels Sprouts | Mar 17 | Apr 7 | Apr 21 | Jul 21 – Sep 15 | 90–130 |
| Butternut Squash | Mar 17 | Apr 28 | May 5 | Aug 4 – Sep 8 | 85–110 |
| Cabbage | Mar 17 | Apr 7 | Apr 21 | Jun 23 – Aug 18 | 60–100 |
| Calabash | Feb 24 | Apr 28 | May 5 | Jul 28 – Sep 22 | 80–120 |
| Carrots | — | Apr 7 | — | Jun 9 – Jul 14 | 60–80 |
| Cauliflower | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Aug 18 | 55–100 |
| Celeriac | Mar 17 | Apr 7 | Apr 21 | Aug 4 – Sep 8 | 100–120 |
| Celery | Mar 17 | Apr 7 | Apr 21 | Jul 14 – Sep 8 | 80–120 |
| Celtuce | Mar 17 | Apr 7 | Apr 21 | Jun 23 – Aug 4 | 60–90 |
| Chard | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Aug 4 | 50–60 |
| Chickpeas | Mar 17 | Apr 7 | Apr 21 | Jul 14 – Aug 25 | 80–110 |
| Chicory | Mar 17 | Apr 7 | Apr 21 | Jun 23 – Aug 4 | 60–85 |
| Chinese Cabbage | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Jul 14 | 50–70 |
| Christmas Lima Beans | Feb 24 | Apr 28 | May 5 | Jul 28 – Sep 1 | 80–100 |
| Collard Greens | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Aug 18 | 55–75 |
| Corn | — | Apr 28 | — | Jun 30 – Aug 25 | 60–100 |
| Cowpeas | — | Apr 28 | — | Jun 30 – Aug 11 | 60–90 |
| Cress | Mar 17 | Apr 7 | Apr 21 | May 5 – May 26 | 14–21 |
| Crookneck Squash | Mar 17 | Apr 28 | May 5 | Jun 23 – Jul 21 | 45–60 |
| Crosne | — | Apr 7 | — | Sep 8 – Oct 20 | 150–200 |
| Cucumber | Mar 17 | Apr 28 | May 5 | Jun 30 – Aug 25 | 50–70 |
| Daikon | — | Apr 7 | — | Jun 2 – Jun 30 | 50–70 |
| Delicata Squash | Mar 17 | Apr 28 | May 5 | Jul 28 – Sep 1 | 80–100 |
| Edamame | — | Apr 28 | — | Jul 14 – Aug 25 | 75–100 |
| Eggplant | Feb 10 | Apr 28 | May 5 | Jul 14 – Sep 15 | 65–85 |
| Endive | Mar 17 | Apr 7 | Apr 21 | Jun 9 – Jul 14 | 45–65 |
| Escarole | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Jul 14 | 50–70 |
| Fava Beans | Mar 17 | Apr 7 | Apr 21 | Jul 7 – Aug 18 | 75–100 |
| Fennel | Feb 24 | Apr 28 | May 5 | Jul 7 – Aug 18 | 60–90 |
| Garlic | — | — | — | — | 90–240 |
| Green Beans | — | Apr 28 | — | Jun 23 – Aug 18 | 50–65 |
| Horseradish | — | — | May 5 | Sep 8 – Nov 17 | 120–180 |
| Hot Peppers | Feb 10 | Apr 28 | May 5 | Jul 14 – Oct 20 | 70–120 |
| Hubbard Squash | Mar 17 | Apr 28 | May 5 | Aug 18 – Sep 22 | 100–120 |
| Kabocha | Mar 17 | Apr 28 | May 5 | Aug 4 – Sep 1 | 85–100 |
| Kai Lan | Mar 17 | Apr 7 | Apr 21 | Jun 9 – Jul 7 | 45–60 |
| Kale | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Aug 11 | 50–70 |
| Kidney Beans | — | Apr 28 | — | Jul 28 – Sep 1 | 85–110 |
| Kohlrabi | Mar 17 | Apr 7 | Apr 21 | Jun 9 – Jul 14 | 45–65 |
| Komatsuna | Mar 17 | Apr 7 | Apr 21 | May 26 – Jun 30 | 35–50 |
| Leeks | Mar 17 | Apr 7 | Apr 21 | Jul 21 – Oct 6 | 90–150 |
| Lentils | Mar 17 | Apr 7 | Apr 21 | Jul 14 – Aug 25 | 80–110 |
| Lettuce | Mar 17 | Apr 7 | Apr 21 | May 26 – Aug 4 | 30–60 |
| Lima Beans | — | Apr 28 | — | Jun 30 – Aug 11 | 60–90 |
| Loofah | Feb 24 | Apr 28 | May 5 | Aug 18 – Oct 20 | 100–150 |
| Luffa | Feb 24 | Apr 28 | May 5 | Aug 4 – Oct 20 | 90–150 |
| Mache | Mar 17 | Apr 7 | Apr 21 | Jun 2 – Jul 7 | 40–60 |
| Melon | Mar 17 | Apr 28 | May 5 | Jul 14 – Sep 1 | 70–100 |
| Microgreens | Mar 17 | Apr 7 | Apr 21 | Apr 28 – May 26 | 7–21 |
| Mitsuba | Mar 17 | Apr 7 | Apr 14 | Jun 9 – Aug 4 | 50–70 |
| Mizuna | Mar 17 | Apr 7 | Apr 21 | May 26 – Jun 23 | 30–45 |
| Mustard Greens | Mar 17 | Apr 7 | Apr 21 | May 26 – Jul 28 | 30–50 |
| Napa Cabbage | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Jul 21 | 55–75 |
| New Zealand Spinach | Feb 24 | Apr 28 | May 5 | Jun 30 – Jul 28 | 55–70 |
| Okra | Feb 24 | Apr 28 | May 5 | Jun 30 – Aug 25 | 50–65 |
| Onion | Mar 17 | Apr 7 | Apr 21 | Jul 21 – Sep 8 | 90–120 |
| Pac Choi | Mar 17 | Apr 7 | Apr 21 | Jun 2 – Jun 30 | 40–55 |
| Parsnip | — | Apr 7 | — | Jul 21 – Sep 1 | 100–130 |
| Patty Pan Squash | Mar 17 | Apr 28 | May 5 | Jun 23 – Jul 21 | 45–60 |
| Peas | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Aug 11 | 55–70 |
| Peppers | Feb 10 | Apr 28 | May 5 | Jul 7 – Sep 15 | 60–90 |
| Pole Beans | Feb 24 | Apr 28 | May 5 | Jun 30 – Aug 25 | 55–70 |
| Potatoes | Feb 24 | Apr 28 | May 5 | Jul 14 – Sep 22 | 70–120 |
| Pumpkin | Mar 17 | Apr 28 | May 5 | Aug 4 – Sep 22 | 85–120 |
| Purslane | Mar 17 | Apr 7 | Apr 21 | Jun 2 – Jul 7 | 40–60 |
| Radicchio | Mar 17 | Apr 7 | Apr 21 | Jun 23 – Jul 28 | 60–80 |
| Radish | — | Apr 7 | — | May 5 – May 26 | 22–35 |
| Rhubarb | — | — | May 12 | — | 365–730 |
| Romanesco | Mar 17 | Apr 7 | Apr 21 | Jul 7 – Aug 18 | 75–100 |
| Rutabaga | — | Apr 7 | — | Jun 30 – Aug 4 | 80–100 |
| Salsify | — | Apr 7 | — | Jul 21 – Sep 1 | 100–130 |
| Savoy Cabbage | Mar 17 | Apr 7 | Apr 21 | Jun 30 – Aug 25 | 70–110 |
| Scallions | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Jul 14 | 50–70 |
| Scarlet Runner Beans | Feb 24 | Apr 28 | May 5 | Jul 7 – Aug 11 | 60–80 |
| Shallot | Mar 17 | Apr 7 | Apr 21 | Jul 21 – Sep 8 | 90–120 |
| Shiso | Mar 3 | Apr 28 | May 5 | Jun 30 – Aug 25 | 50–70 |
| Snap Peas | Feb 24 | Apr 28 | May 5 | Jun 30 – Aug 25 | 55–70 |
| Snow Peas | Mar 17 | Apr 7 | Apr 21 | Jun 16 – Aug 11 | 50–65 |
| Soybeans | — | Apr 28 | — | Jul 21 – Sep 15 | 80–120 |
| Spaghetti Squash | Mar 17 | Apr 28 | May 5 | Aug 4 – Sep 1 | 85–100 |
| Spinach | Mar 17 | Apr 7 | Apr 21 | May 26 – Jul 28 | 35–50 |
| Squash (Summer) | Mar 17 | Apr 28 | May 5 | Jun 23 – Aug 25 | 45–65 |
| Squash (Winter) | Mar 17 | Apr 28 | May 5 | Jul 28 – Sep 22 | 80–120 |
| Sunchoke | — | — | May 5 | Aug 25 – Oct 20 | 110–150 |
| Sunflower | Feb 24 | Apr 28 | May 5 | Jul 14 – Sep 1 | 70–100 |
| Sweet Corn | — | Apr 28 | — | Jun 30 – Aug 11 | 60–90 |
| Sweet Potatoes | Feb 24 | Apr 28 | May 5 | Aug 4 – Sep 22 | 90–120 |
| Tatsoi | Mar 17 | Apr 7 | Apr 21 | May 26 – Jun 30 | 35–50 |
| Tomatillo | Feb 24 | Apr 28 | May 5 | Jul 7 – Sep 15 | 60–85 |
| Tomatoes | Feb 24 | Apr 28 | May 5 | Jul 7 – Sep 15 | 60–85 |
| Turnip | — | Apr 7 | — | May 19 – Jun 23 | 40–60 |
| Watercress | Mar 17 | Apr 7 | Apr 21 | Jun 2 – Jul 7 | 40–60 |
| Watermelon | Mar 17 | Apr 28 | May 5 | Jul 14 – Sep 1 | 70–100 |
| Wax Beans | — | Apr 28 | — | Jun 23 – Aug 18 | 50–65 |
| Winter Melon | Feb 24 | Apr 28 | May 5 | Aug 4 – Sep 22 | 90–120 |
| Yard Long Beans | Feb 24 | Apr 28 | May 5 | Jun 30 – Aug 11 | 55–80 |
| Zucchini | Mar 17 | Apr 28 | May 5 | Jun 23 – Aug 18 | 45–60 |
🍓 Fruits to Grow in Dauphin County
27 fruits that grow well in Zone 6b with planting dates for Dauphin County.
Show all 27 fruits with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Alpine Strawberries | — | — | May 12 | Aug 11 – Nov 24 | 90–180 |
| Aronia | — | — | May 12 | — | 730–1095 |
| Blackberries | — | — | May 12 | — | 365–730 |
| Blueberries | — | — | May 12 | — | 730–1095 |
| Boysenberries | — | — | May 12 | — | 365–730 |
| Cantaloupe | — | — | May 12 | Jul 21 – Aug 25 | 70–90 |
| Che Fruit | — | — | May 12 | — | 1095–1825 |
| Cranberries | — | — | May 12 | — | 730–1095 |
| Currants | — | — | May 12 | — | 730–1095 |
| Elderberries | — | — | May 12 | — | 730–1095 |
| Goji Berries | — | — | May 12 | — | 730–1095 |
| Gooseberries | — | — | May 12 | — | 730–1095 |
| Grapes | — | — | May 12 | — | 730–1095 |
| Ground Cherry | — | — | May 12 | Jul 21 – Sep 15 | 65–80 |
| Hardy Kiwi | — | — | May 12 | — | 1095–1825 |
| Haskaps | — | — | May 12 | — | 730–1095 |
| Honeydew | — | — | May 12 | Aug 4 – Sep 15 | 80–110 |
| Jostaberry | — | — | May 12 | — | 730–1095 |
| Lingonberries | — | — | May 12 | — | 730–1095 |
| Medlar | — | — | May 12 | — | 1095–1825 |
| Mulberries | — | — | May 12 | — | 730–1825 |
| Pawpaw | — | — | May 12 | — | 1095–2555 |
| Persimmon | — | — | May 12 | — | 1095–2555 |
| Quince | — | — | May 12 | — | 1095–1825 |
| Raspberries | — | — | May 12 | — | 365–730 |
| Serviceberries | — | — | May 12 | — | 730–1095 |
| Strawberries | — | — | May 12 | Aug 11 – Nov 24 | 90–365 |
🌿 Herbs to Grow in Dauphin County
38 herbs that grow well in Zone 6b with planting dates for Dauphin County.
Show all 38 herbs with planting dates
| Plant | Start Indoors | Direct Sow | Transplant | Harvest | Days to Maturity |
|---|---|---|---|---|---|
| Angelica | Mar 17 | Apr 7 | Apr 14 | — | 365–730 |
| Anise | Mar 17 | Apr 7 | Apr 14 | Jul 14 – Sep 29 | 90–120 |
| Basil | Mar 3 | Apr 28 | May 5 | Jun 30 – Sep 1 | 50–75 |
| Bee Balm | — | — | Apr 28 | Jul 28 – Oct 13 | 90–120 |
| Borage | Mar 17 | Apr 7 | Apr 14 | Jun 9 – Jul 28 | 50–60 |
| Caraway | Mar 17 | Apr 7 | Apr 14 | — | 365–450 |
| Catnip | — | — | Apr 28 | Jun 30 – Sep 1 | 60–80 |
| Chamomile | Mar 17 | Apr 7 | Apr 14 | Jun 16 – Aug 25 | 60–90 |
| Chervil | Mar 17 | Apr 7 | Apr 14 | May 26 – Jul 28 | 40–60 |
| Chives | — | — | Apr 28 | Jun 30 – Sep 8 | 60–90 |
| Cilantro | Mar 17 | Apr 7 | Apr 14 | May 26 – Jul 28 | 40–60 |
| Comfrey | — | — | Apr 28 | Jun 30 – Sep 8 | 60–90 |
| Cumin | Mar 17 | Apr 7 | Apr 14 | Jul 28 – Sep 29 | 100–120 |
| Dill | Mar 17 | Apr 7 | Apr 14 | May 26 – Jul 28 | 40–60 |
| Echinacea | — | — | Apr 28 | Sep 1 – Nov 10 | 120–180 |
| Epazote | Mar 3 | Apr 28 | May 5 | Jun 23 – Aug 18 | 45–60 |
| Fennel (herb) | Mar 17 | Apr 7 | Apr 14 | Jun 16 – Aug 25 | 60–90 |
| Feverfew | — | — | Apr 28 | Jul 28 – Oct 13 | 90–120 |
| Garlic Chives | — | — | Apr 28 | Jun 30 – Sep 8 | 60–90 |
| Horehound | — | — | Apr 28 | Jul 14 – Sep 8 | 75–90 |
| Hyssop | — | — | Apr 28 | Jul 7 – Sep 8 | 70–90 |
| Lavender | — | — | Apr 28 | Jul 28 – Nov 10 | 90–200 |
| Lemon Balm | — | — | Apr 28 | Jun 30 – Aug 18 | 60–70 |
| Lemon Thyme | — | — | Apr 28 | Jul 7 – Sep 8 | 70–90 |
| Lovage | — | — | Apr 28 | Jul 7 – Sep 8 | 70–90 |
| Marjoram | — | — | Apr 28 | Jun 30 – Sep 8 | 60–90 |
| Mint | — | — | Apr 28 | Jun 30 – Sep 8 | 60–90 |
| Oregano | — | — | Apr 28 | Jun 30 – Sep 8 | 60–90 |
| Parsley | Mar 17 | Apr 7 | Apr 14 | Jun 16 – Aug 18 | 60–80 |
| Rue | — | — | Apr 28 | Jul 7 – Sep 8 | 70–90 |
| Sage | — | — | Apr 28 | Jul 14 – Sep 8 | 75–90 |
| Savory | — | — | Apr 28 | Jun 23 – Aug 18 | 50–70 |
| Sorrel | Mar 17 | Apr 7 | Apr 14 | May 26 – Jul 28 | 40–60 |
| Tarragon | — | — | Apr 28 | Jun 30 – Sep 8 | 60–90 |
| Thai Basil | Mar 3 | Apr 28 | May 5 | Jun 30 – Sep 1 | 50–75 |
| Thyme | — | — | Apr 28 | Jul 7 – Sep 8 | 70–90 |
| Valerian | — | — | Apr 28 | Sep 1 – Nov 10 | 120–180 |
| Yarrow | — | — | Apr 28 | Jul 28 – Oct 13 | 90–120 |
Monthly Planting Guide for Dauphin County
Gardening Guides & Resources
Helpful guides from The Ultimate Homestead to improve your garden in Dauphin County.
Frequently Asked Questions
What planting zone is Dauphin County, PA?
Dauphin County is in USDA Hardiness Zone 6b. 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 Dauphin County, PA?
Based on 31 years of NOAA weather station data, the median last spring frost in Dauphin County falls around April 21. In 8 out of 10 years, last frost lands between April 6 and May 9 — a 33-day window of variability. Use May 9 as your conservative safe-to-plant date for frost-sensitive crops.
When is the first fall frost in Dauphin County, PA?
The median first fall frost in Dauphin County arrives around October 22. In cold years it can arrive as early as October 12; in mild years as late as November 2. Harvest or protect frost-sensitive crops — tomatoes, peppers, basil, squash — before this date.
How long is the growing season in Dauphin County?
Dauphin County has a frost-free growing season of approximately 184 days. This is enough time for most warm-season crops including tomatoes, peppers, and squash with proper timing.
What is the soil like in Dauphin County for gardening?
Dauphin County has predominantly Silt Loam soil with a pH range of 5–6.2 and Moderately Well Drained drainage. Most vegetables and herbs grow well with standard composting and seasonal soil amendment.
What is grown commercially in Dauphin County?
Dauphin County has commercial agriculture that includes Hay, Dairy, Corn, Apples. These crops reflect the local climate and soil conditions — what succeeds commercially often translates well to home gardens in the same area.
Is Dauphin County a good location for home gardening?
Dauphin County scores 76/100 (Good) on our Microclimate Index, which combines frost reliability, drought pressure, soil challenge, elevation risk, and long-term climate trend. This is an above-average location for home gardening with relatively predictable growing conditions.
Plan Your Garden with Confidence
Get our free Garden Planner — designed to help Dauphin County gardeners in Zone 6b 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.
