When to Plant Eggplant in New Brunswick
Published: April 24, 2026 · Updated: April 27, 2026
Warm-season nightshade requiring the longest indoor start of any common vegetable — 8–10 weeks before last frost. Needs soil above 15°C and consistent summer heat; intolerant of cold below 10°C.
Eggplant grow well in this province with appropriate variety selection and standard Canadian planting timing.
Eggplant Planting Window for New Brunswick
Start seeds indoors: March 8–15 (varies by city — earliest in southern Ontario, latest on the Prairies)
Transplant outdoors: May 31–June 10 (after last frost in your city)
Minimum soil temperature: 16°C (60°F)
Days to harvest: 65–80 days
Sun requirement: Full sun (8+ hours)
⚠ Start eggplant indoors 8–10 weeks before last frost — same timing as peppers. Transplant 2–3 weeks after last frost when soil is above 60°F. Needs heat and full sun. Does not tolerate cold — protect from temps below 50°F.
New Brunswick Cities — Eggplant Planting Dates
City-specific frost dates and eggplant planting windows for New Brunswick.
Growing Eggplant in New Brunswick
- Use a heat mat during germination — eggplant seeds need 24–27°C soil to sprout reliably.
- Protect transplants from cold spring nights — temperatures below 10°C halt growth for weeks.
- Use stakes or small cages — eggplant stems bend or break under the weight of mature fruit.
- Harvest while fruit skin is glossy; dull skin signals an over-ripe, bitter, seedy interior.
Companion Planting for Eggplant
In New Brunswick gardens, pair eggplant with Pepper, Bean, Basil, Marigold. Avoid planting near Fennel, Brassicas, which compete with or inhibit eggplant growth.
Common Pests and Problems
Eggplant in New Brunswick are commonly affected by Flea Beetle, Colorado Potato Beetle, Spider Mite, Verticillium Wilt. Floating row covers installed at planting block most adult pests from laying eggs, and a weekly scouting routine catches infestations before they damage the crop.
Frequently Asked Questions
When should I plant eggplant in New Brunswick?
In New Brunswick (Canadian Zone 5b), start seeds indoors around March 8 and transplant around May 31. Eggplant grow well in this province with appropriate variety selection and standard Canadian planting timing.
What is the best eggplant variety for New Brunswick?
New Brunswick gardeners should prioritise varieties bred for shorter seasons or Canadian climates. For eggplant in Canadian Zone 5b, look for cultivars labelled under 80 days to maturity. Local nurseries and provincial seed exchanges curate varieties that ripen within Canadian frost-free windows.
How does New Brunswick's climate affect eggplant?
New Brunswick spans Canadian Zone 5b with frost-free seasons ranging from roughly 151 to 155 days. Eggplant need warm soil (16°C minimum) and steady heat, so timing transplants correctly is critical — too early and plants sit in cold soil; too late and frost cuts the season short.
Can I grow eggplant in containers in New Brunswick?
Yes. Container growing on balconies and patios extends the viable growing area across every Canadian province. Dark-coloured containers warm up faster in spring and extend the season on both ends. Choose a 5-gallon or larger pot for eggplant and water daily during hot summer weather, since containers dry out quickly.
When is the first fall frost in New Brunswick?
First fall frost dates in New Brunswick range from October 8 in the coldest areas to October 12 in the warmest. Most eggplant plantings in New Brunswick are spring-timed to harvest before the first fall frost rather than as a second fall crop.