Warm-Season Vegetable

When to Plant Eggplant in Pennsylvania

Beautiful purple fruits that love heat even more than tomatoes. Start early indoors for best results.

The Short Answer

Eggplant in Pennsylvania demands dedication — the crop needs more heat than the state readily provides, especially outside the southeastern counties. But Philadelphia-area gardeners and those in the warm microclimates of the lower Susquehanna Valley can produce beautiful eggplant with Asian varieties and season extension techniques.

Pennsylvania Frost Dates

Your planting dates depend on which part of Pennsylvania you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Northern Pennsylvania 5a, 5b, 6a May 5 - May 20 Sep 20 - Oct 5
Central Pennsylvania 5b, 6a, 6b Apr 25 - May 10 Oct 1 - Oct 15
Philadelphia Region 7a, 7b Apr 5 - Apr 20 Oct 15 - Nov 5

Eggplant Planting Schedule for Pennsylvania

Northern Pennsylvania (Zones 5a, 5b, 6a)

Average last frost: May 5 - May 20 · Average first frost: Sep 20 - Oct 5

Start Seeds Indoors
8 wks before frost
Transplant Outside
3 wks after frost

Central Pennsylvania (Zones 5b, 6a, 6b)

Average last frost: Apr 25 - May 10 · Average first frost: Oct 1 - Oct 15

Start Seeds Indoors
8 wks before frost
Transplant Outside
3 wks after frost

Philadelphia Region (Zones 7a, 7b)

Average last frost: Apr 5 - Apr 20 · Average first frost: Oct 15 - Nov 5

Start Seeds Indoors
8 wks before frost
Transplant Outside
3 wks after frost

Growing Eggplant in Pennsylvania

State-Specific Growing Tips

Start seeds indoors 8-10 weeks before last frost. Transplant in late May (southeast PA) to early June (central PA) only after nights consistently exceed 60°F. Northern PA is marginal for eggplant. Black plastic mulch is essential. Container growing in large pots on a sunny patio is often more productive than in-ground planting because containers accumulate more heat. Full sun exposure is non-negotiable.

Recommended Varieties for Pennsylvania

Asian varieties for reliability: Ichiban, Orient Express, Hansel, Gretel. Southeast PA gardeners can try globe types: Neon, Dancer. Northern PA should only attempt Asian varieties in containers. Penn State Extension recommends starting with container-grown Asian varieties before attempting in-ground globe production.

Common Challenges in Pennsylvania

Insufficient heat outside southeastern PA. Cool nights cause blossom drop. Flea beetles are aggressive. Colorado potato beetle. Verticillium wilt in soils where nightshades have been grown previously. Groundhog damage to plants in rural gardens.

Growing Tips

Harvest when skin is glossy and firm. Dull skin means overripe and seedy. Use row covers if nights are cool.

Companion Planting

Plant eggplant alongside these companions for better growth:

Peppers Beans Marigolds

Keep eggplant away from:

Fennel

The Bottom Line

Eggplant can be grown successfully in Pennsylvania with proper attention to regional frost dates and local growing conditions. Timing varies across the state — Northern Pennsylvania gardeners work with a last frost around May 5 - May 20, while Philadelphia Region sees frost end around Apr 5 - Apr 20. Choose varieties suited to your region, amend your soil based on its specific needs, and monitor for the pests and diseases most common in your area. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Eggplant Growing Guide National planting guide with all states Pennsylvania Planting Calendar All plants for Pennsylvania Eggplant in Alabama Alabama planting dates Eggplant in Alaska Alaska planting dates Eggplant in Arizona Arizona planting dates Eggplant in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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