How to Grow Red Giant Mustard
Brassica juncea 'Red Giant'
Red Giant Mustard is a vibrant cool-season brassica prized for its spicy leaves and quick growth. Gardeners grow it to add color and heat to salads or as a fast green crop before winter. Its compact size makes it ideal for small plots or containers.
📷 Wikimedia CommonsStarting Red Giant Mustard: indoors or direct sow?
🌾 Sow directly in the garden — Red Giant Mustard is not usually started indoors.
This variety is best direct-sown outdoors rather than started indoors and transplanted.
Soil, care & harvest
Prepare loose, fertile soil with a pH between 6.0 and 7.0. Sow seeds directly outdoors 2 to 6 weeks before your last spring frost date, as this cool-season crop tolerates light frosts well. Press the tiny seeds gently into the soil surface at a depth of about one-quarter inch. Expect germination within 3 to 7 days under these conditions.
Space plants 8 to 12 inches apart to ensure good air circulation and prevent disease. Water consistently to maintain high moisture levels, as dry spells can cause bolting or bitterness. Apply a light layer of mulch around the base to retain soil moisture and suppress weeds. Feed lightly with balanced fertilizer if growth seems slow.
Watch for flea beetles, aphids, cabbage worms, and harlequin bugs; use row covers early to deter them. Prevent downy mildew, white rust, black rot, and clubroot by ensuring good airflow and avoiding overhead watering. Harvest leaves or whole plants 45 to 60 days after sowing when they reach your desired size for salads or cooking.
When to Plant Red Giant Mustard
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | April – May | June – July | July – September |
| Zone 2 | April – May | May – July | July – September |
| Zone 3 | March – April | May – June | June – October |
| Zone 4 | March – April | April – June | June – October |
| Zone 5 | February – March | April – May | June – November |
| Zone 6 | February – March | April – May | May – November |
| Zone 7 | February – March | March – May | May – November |
| Zone 8 | January – February | March – April | April – December |
| Zone 9 | January | February – March | March – December |
| Zone 10 | January | January – March | March – December |
| Zone 11 | January | January – February | February – December |
| Zone 12 | January | January – February | February – December |
| Zone 13 | January | January – February | February – December |
Companion Plants for Red Giant Mustard
✓ Good companions
Different root depths reduce competition and carrots may benefit from mustard's pest-repelling prope…
Attracts beneficial insects like parasitic wasps that control cabbage worms and aphids
Natural pest deterrent against cabbage worms and root maggots
Provides ground cover and efficient space utilization without competing for nutrients
Repel flea beetles and cabbage worms while attracting beneficial predatory insects
Act as trap crop for aphids and flea beetles, drawing pests away from mustard
Repels cabbage moths, aphids, and flea beetles with strong sulfur compounds
Compatible growing requirements and harvest timing, efficient garden space usage
✗ Keep away from
Can create too much shade for mustard greens which prefer full sun exposure
Mustard can inhibit strawberry growth and development through allelopathic effects
Brassicas can stunt tomato growth and both attract similar pest problems
Nutrition Facts
Per 100g serving (USDA FoodData Central)
