When should I plant Eggplant in Zone 4a?

Start Eggplant seeds indoors around Mar 10. Transplant outdoors after May 26. Expect first harvest around Jul 30.

What is the last frost date for Zone 4a?

The average last spring frost date for Zone 4a is May 5. The first fall frost averages Oct 1, giving a 149-day growing season.

Can I grow Eggplant in Zone 4a?

Yes. Eggplant needs 80 days to harvest. Zone 4a has a 149-day growing season, which is sufficient.

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🍆 Growing Eggplant in Zone 4a

Zone 4a has cold winters and a moderate growing season. Timing is key for Eggplant in this zone. Last frost: May 5. First frost: Oct 1.

Planting Calendar

Indoor

Outdoor

Harvest

Mar 10Oct 1

Season: May 5 – Oct 1 (149 days)

Zone4a

Last FrostMay 5

First FrostOct 1

Season Length149 days

Days to Harvest80

SunFull Sun

Frost ToleranceNone

Spacing1/sqft (12" apart)

When to Plant Eggplant in Zone 4a

Start Seeds Indoors: Mar 10

Start Eggplant seeds indoors around Mar 10 (8 weeks before last frost). Optimal germination temperature: 85°F. Germinates in 7–14 days.

Transplant Outdoors: May 26

Transplant Eggplant seedlings outdoors after May 26. Wait until soil temperature reaches 65°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.

Harvest: Jul 30

First harvest approximately Jul 30 (~65 days from transplant). Continue harvesting until first frost (Oct 1).

Companion Planting

✅ Beans✅ Peppers✅ Marigolds✅ Amaranth✅ Basil

❌ Fennel

Eggplant in Other Zones

1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13b

Plan Your Eggplant Garden

Track Eggplant from seed to harvest with personalized frost dates, watering recommendations, and companion planting visualization.

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