Pennsylvania · zones 5b–7b
When to plant green beans in Pennsylvania.
Sow between Apr 25 to Jun 15 in a typical year, keyed to Pennsylvania's median last frost around Apr 25. A second, fall sowing fits Jun 30 to Aug 2. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Green Beans dates for a typical Pennsylvania season.
Direct sow
Apr 25 to Jun 15
Keyed to the ~Apr 25 last frost. Sow 1" deep, 3" apart.
Fall round
Jun 30 to Aug 2
Counted back from the ~Oct 14 first frost.
Harvest
~55 days later
~0.75 lb per plant over ~3 weeks.
Pennsylvania spans more than one climate: Zone 6 is the most common zone, but the state runs 5b to 7b. That's why the planner works from your ZIP code's frost dates, not your zone: mountain and coastal gardens in the same state can be three weeks apart.
In Pennsylvania: watch for
The pests that find green beans here.
A middle-length season, about 172 frost-free days, means bush bean overlaps mexican bean beetle for a stretch each summer. Check plants every week or two and treat early.
Coppery ladybug-like beetles; leaves skeletonized to lace.
Organic fix: Handpick adults and yellow egg clusters; neem.
Orange or white spots on leaves late in the season.
Organic fix: Water at the base, space plants, spray neem.
Anthracnose
Sunken dark-red cankers on the pods, and leaf veins turning brick-red to black underneath.
Organic fix: Start with certified seed, water at the base, and stay out of the patch while the leaves are wet.
Your season math: Pennsylvania gives green beans about 172 frost-free days, and it needs roughly 55 days to a first harvest. That fits about 12 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting green beans in Pennsylvania: questions
When should I plant green beans in Pennsylvania?+
In a typical Pennsylvania year, sow green beans between Apr 25 to Jun 15, keyed to the state's median last frost around Apr 25. There's also a fall window: Jun 30 to Aug 2. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Pennsylvania?+
Pennsylvania spans zones 5b–7b, mostly zone 6. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many green beans plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.