Can You Grow Mustard Greens in Canadian Zone 4?
Quick Answer:
✅ Yes — Mustard greens grow fast and easy in your zone — two crops per year in spring and fall.
✅ Yes
Mustard Greens grows well in Canadian Zone 4
Mustard greens grow fast and easy in your zone — two crops per year in spring and fall.
📅 When to Plant in Canadian Zone 4
Direct Sow
May 1
Last Sow Date
Aug 22
🌾 Harvest
May 31 – Jun 10
Based on Canadian Zone 4's average last frost of early May and first frost of early October.
🌱 Growing Mustard Greens in Canadian Zone 4
Direct sow in early spring or fall — hot weather triggers bolting and extreme bitterness. Harvest outer leaves continuously. Baby leaves at 3 weeks are excellent for salads. Grows well indoors under lights.
🪴 Container: 3+ gal pot🏠 Indoor Viable💧 Hydroponic OK❄️ Frost Tolerant
🗺️ Canadian Plant Hardiness Zones
Zone 4 is shown in
this colour
on the map below
Canadian Plant Hardiness Zone Map (2014) — Agriculture & Agri-Food Canada / Canadian Forest Service
Canadian zones run 0–9 (coldest to warmest) — a separate system from USDA zones. Browse all Canadian zones →
Technical climate details for Canadian Zone 4
- USDA Zone
- 4
- Last Frost
- early May
- First Frost
- early October
- Frost-Free Days
- 152
- Mustard Greens Zone Range
- 4a – 10b
- Days to Harvest
- 30–40 days
Frequently Asked Questions
Mustard greens grow fast and easy in your zone — two crops per year in spring and fall.
Canadian Zone 4 is in USDA Hardiness Zone 4 with approximately 152 frost-free days per year.
Mustard Greens grows in USDA Zones 4a–10b.
Mustard Greens is beginner-friendly and one of the easier crops to grow.