Plant Eggplant in Zone 5b
Seed-starting, transplant & harvest dates for USDA Zone 5b
Zone 5b averages 166 frost-free days, running from a last spring frost around April 25 to a first fall frost around October 8. Eggplant needs roughly 85 days from planting out to first harvest, so it uses about 51 percent of that window. Eggplant is a tender crop, which is what decides where in the window it belongs.
Because eggplant needs a head start, sow seed indoors around Feb 28, about 8 weeks ahead of the Zone 5b last frost. Transplants go out around May 9. Starting earlier than that in Zone 5b usually backfires: plants outgrow their cells and stall when they finally hit cold soil.
Fall planting: eggplant in Zone 5b
Eggplant has no useful fall window in Zone 5b. Eggplant needs a long warm run to finish, so a second planting is realistic only in zone 9 and warmer.
Eggplant needs a long warm run to finish, so a second planting is realistic only in zone 9 and warmer.
Fall dates are counted backward from the Zone 5b average first frost, not forward from a sowing date. See the fall planting calendar by zone for the full method.
Spring vs fall eggplant in Zone 5b
| Planting | Sow or start | In the ground | Harvest |
|---|---|---|---|
| Spring | Feb 28 | May 9 | Aug 2 |
| Fall | — | — | — |
Eggplant in nearby zones
Further reading on eggplant
- When to start seeds indoors by zone
Indoor start dates for eggplant, counted back from your last frost.
- Hardening off seedlings: a schedule
A day by day plan for moving eggplant seedlings outdoors.
- Best grow lights for seed starting
What light seedlings actually need, and which fixtures deliver it.
Other crops in Zone 5b
Frequently asked questions
When should I start eggplant in Zone 5b?
Start eggplant seeds indoors around Feb 28 (Zone 5b).
Can I direct sow eggplant in Zone 5b?
Eggplant is best started indoors and transplanted in Zone 5b rather than direct sown.
Can I plant eggplant in the fall in Zone 5b?
Eggplant has no useful fall window in Zone 5b. Eggplant needs a long warm run to finish, so a second planting is realistic only in zone 9 and warmer.
Will eggplant survive frost in Zone 5b?
No. Eggplant is a tender crop and a single light frost ends it, so every Zone 5b planting has to finish before the average first frost.