In Pennsylvania, cucumbers should be planted outdoors after the danger of frost has passed, typically in May or June. Specifically:
- Cucumber seeds can be planted directly outside once the soil temperature is near 60°F or higher, and air temperatures are consistently between 63°F and 95°F.
- The average last frost date in much of Pennsylvania ranges from mid-April to early May, depending on the region.
- It is recommended to start seeds indoors between late May and late June for transplanting outdoors after June 26 when temperatures are consistently warm enough.
- Planting cucumbers outdoors before June 26 without protection is risky due to potential cold damage.
- For best results, planting cucumbers outdoors usually happens around mid-May to early June, often near or after Mother's Day, which is considered a safe date to avoid frost risk.
Therefore, in Pennsylvania, the best time to plant cucumbers outdoors is from mid-May to late June, after the frost danger has passed and the soil has warmed sufficiently.
