When to Plant Turnips in Ontario
Published: April 24, 2026 · Updated: April 27, 2026
Fast-growing cool-season root crop — some varieties ready in just 35 days. Best planted in late summer for fall harvest; frost sweetens the roots. Direct sow only; resents transplanting.
Turnips grow well in this province with appropriate variety selection and standard Canadian planting timing.
Turnips Planting Window for Ontario
Direct sow outdoors: March 30–April 9
Minimum soil temperature: 4°C (40°F)
Days to harvest: 35–60 days
Sun requirement: Full sun to partial shade
Fall crop planting: September 6–16
⚠ Direct sow turnips 2–4 weeks before last frost for spring crop. Best planted in late summer (6–8 weeks before first fall frost) for fall harvest — frost sweetens the roots. Fast-growing: some varieties ready in just 35 days.
Ontario Cities — Turnips Planting Dates
City-specific frost dates and turnip planting windows for Ontario.
Growing Turnips in Ontario
- Thin seedlings to 4-inch spacing when plants are 3 inches tall — crowded turnips produce small woody roots.
- Both roots AND greens are edible — harvest baby turnip greens 4 weeks after sowing, roots 5–9 weeks.
- Fall turnips are sweetest — plant 8 weeks before first frost and let cold weather convert starches to sugars.
- Succession plant every 2–3 weeks for continuous harvest through spring; skip summer heat and resume in fall.
Companion Planting for Turnips
In Ontario gardens, pair turnip with Pea, Mint, Rosemary, Thyme. Avoid planting near Potato, Radish, which compete with or inhibit turnip growth.
Common Pests and Problems
Turnips in Ontario are commonly affected by Flea Beetle, Aphid, Cabbage Root Maggot. 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 turnip in Ontario?
In Ontario (Canadian Zones 5b–6b), direct sow turnip around March 30. Turnips grow well in this province with appropriate variety selection and standard Canadian planting timing.
What is the best turnip variety for Ontario?
Ontario gardeners should prioritise varieties bred for shorter seasons or Canadian climates. For turnips in Canadian Zones 5b–6b, look for cultivars labelled under 60 days to maturity. Local nurseries and provincial seed exchanges curate varieties that ripen within Canadian frost-free windows.
How does Ontario's climate affect turnip?
Ontario spans Canadian Zones 5b–6b with frost-free seasons ranging from roughly 153 to 195 days. Turnips actually prefer the cooler spring and fall windows typical of Ontario, making them one of the most reliable crops in the province.
Can I grow turnip in containers in Ontario?
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 turnip and water daily during hot summer weather, since containers dry out quickly.
When is the first fall frost in Ontario?
First fall frost dates in Ontario range from October 15 in the coldest areas to November 1 in the warmest. For a fall turnip crop, count back from your local first-frost date and plant around September 6–16.