How to Grow Silvia
Brassica oleracea var. gemmifera
Your complete guide to growing Silvia.
When to Plant Silvia
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 | September |
| Zone 2 | April – May | May – July | August – September |
| Zone 3 | March – April | May – June | August – October |
| Zone 4 | March – April | April – June | August – October |
| Zone 5 | February – March | April – May | July – November |
| Zone 6 | February – March | April – May | July – November |
| Zone 7 | February – March | March – May | June – November |
| Zone 8 | January – February | March – April | June – December |
| Zone 9 | January | February – March | May – December |
| Zone 10 | January | January – March | April – December |
| Zone 11 | January | January – February | March – December |
| Zone 12 | January | January – February | March – December |
| Zone 13 | January | January – February | March – December |
Companion Plants for Silvia
✓ Good companions
Root depth complements shallow brassica roots, doesn't compete for nutrients
Improves soil health and may enhance flavor of nearby brassicas
Attracts beneficial insects like parasitic wasps that control cabbage worms
Natural fungicide properties help prevent clubroot and other soil diseases
Grows well in partial shade of brassicas, efficient use of garden space
Repels cabbage moths and other harmful insects with strong fragrance
Acts as trap crop for aphids and flea beetles, draws pests away from brassicas
Strong scent deters cabbage moths, aphids, and flea beetles
✗ Keep away from
Can overshadow brassicas and compete for nitrogen in soil
Brassicas can inhibit strawberry growth and fruit production
Both are heavy feeders competing for same nutrients, tomatoes may stunt brassica growth
Nutrition Facts
Per 100g serving (USDA FoodData Central)
