📍 Elm, PA · Zone 7a · Last frost Friday, April 10, 2026
✏️ ChangeWhen to Plant Eggplant in Elm, Pennsylvania (17521)
Location
Elm, Pennsylvania
ZIP Code
17521
USDA Zone
7a
Last Frost
Friday, April 10, 2026
📅 Your 2026 Planting Dates
Start Seeds Indoors
Friday, February 13, 2026
Transplant Outdoors
Friday, April 24, 2026
Based on last frost Friday, April 10, 2026 · Zone 7a
Pro tip: Start Eggplant seeds indoors 8 weeks before your last frost date, then transplant outdoors around Friday, April 24, 2026.
🌿 Plant Details
☀️ Growing Requirements
☀️
Sun
Full Sun (6-8 hours)
💧
Water
Regular (1 inch/week)
↔️
Spacing
24" apart
🌱
Planting Depth
0.25" deep
Seeds typically germinate in 7-14 days
Ready to Plant Eggplant in Elm?
Get your seeds now so they're ready by Friday, February 13, 2026.
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🤝 Good Companions
⚠️ Avoid Planting Near
Full Companion Planting Guide for Eggplant
See which plants help Eggplant thrive, which to keep away, and raised bed layout tips →
🛠️ Supplies You'll Need
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Common Eggplant Varieties
Popular cultivars to look for at your local nursery or seed supplier.
Black Beauty
The classic large-fruited purple-black eggplant; standard variety since 1902.
Fairy Tale
Small, lavender-striped mini eggplants with very tender, sweet flesh; no bitterness.
Ichiban
Long, slender Japanese eggplant with mild, delicate flavor and thin skin.
Listada de Gandia
Striking Italian heirloom with white-and-purple striped skin; mild, creamy flavor.
Common Eggplant Problems
What to watch for — and how to fix it before it spreads.
Pests
Tiny beetles create dozens of small holes in leaves; seedlings can be badly set back.
Use row covers; apply kaolin clay; strong healthy transplants recover better — don't rush transplanting.
Adults and orange larvae defoliate eggplant rapidly; they prefer eggplant even over potatoes.
Handpick adults and egg masses daily; apply spinosad; rotate crops and till after harvest.
Thrive in hot, dry conditions; cause stippled, yellowing leaves and fine webbing.
Keep plants well-watered; spray neem oil or insecticidal soap on leaf undersides.
Diseases
Soil-borne fungus causing yellowing, wilting, and gradual plant death in mid-season.
Plant resistant varieties; rotate crops; solarize soil before planting in problem beds.
Fruit rot and stem lesions; fruit develops brown, sunken areas that spread rapidly.
Apply copper fungicide; harvest promptly; avoid overhead irrigation.
Common Mistakes
Eggplant is extremely cold-sensitive; chilling injury causes long-term stunting even without frost.
Wait until nighttime temps are reliably above 60°F and soil is at least 65°F before transplanting.
Overripe eggplant becomes seedy, bitter, and spongy; the skin loses its sheen when past peak.
Harvest when skin is glossy and fruit gives slightly to pressure; cut with pruning shears, never twist.
🌾 Seed Saving Guide
🟢 EasyWhen to Harvest Seed
Leave fruit on the plant well past edible stage — it will turn yellow-brown and overripen.
Processing
Cut overripe fruit, scoop seeds into water, let viable seeds sink, rinse and dry flat.
Seed Viability
Up to 4 years when stored cool, dark, and dry.
Pro Tip
Eggplant can cross-pollinate between varieties. Isolate by 300 feet for pure seed saving.
Raised Bed Planting Guides
A 4×8 bed fits 8 plants of Eggplant. See plant counts, spacing grids, and companion pairings for every bed size →
Frequently Asked Questions
When should I plant Eggplant in Elm, Pennsylvania? +
In Elm (Zone 7a), start Eggplant seeds indoors around Friday, February 13, 2026 and transplant outdoors around Friday, April 24, 2026.
What is the last frost date for Elm, Pennsylvania? +
The average last spring frost date for Elm, Pennsylvania (ZIP 17521) is around Friday, April 10, 2026. This is based on NOAA climate normals for USDA Zone 7a.
How long does Eggplant take to grow? +
Eggplant typically matures in about 70 days from transplanting. In Elm, that means you can expect harvest around Friday, April 24, 2026 plus 70 days.
Should I start Eggplant indoors or direct sow in Pennsylvania? +
Eggplant should be started indoors 8 weeks before your last frost date. In Elm, that means starting around Friday, February 13, 2026.
Other Plants for Elm
Growing Eggplant in Zone 7a
Eggplant (Solanum melongena) is a popular garden vegetable. In Elm, Pennsylvania, which is in USDA Hardiness Zone 7a, you should start seeds indoors around Friday, February 13, 2026.
Your average last frost date is Friday, April 10, 2026. Plan to transplant your Eggplant seedlings outdoors around Friday, April 24, 2026, about 2 weeks after your last frost date.