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Opalescent is a beautiful and distinctive dark purple basil with a refreshing flavor profile unlike standard sweet basil — the result of crossing an African landrace basil with a purple basil type. Plants grow quite large, reaching up to 30 inches tall with long, elegant stems that benefit from staking. As versatile as it is striking, Opalescent can be used as an ornamental plant and a culinary herb, adding a distinct flavor and a gorgeous pink-purple tint to vinegars, salads, pestos, and dishes wherever it’s used. A standout in both the garden and the kitchen.
Start indoors 4–6 weeks before last frost. Sow seeds ⅛ inch deep in fertile, well-draining soil. Transplant outdoors after all frost danger has passed and nights are consistently above 50°F, spacing plants 18–24 inches apart in full sun. Plants grow up to 30 inches tall — stake for best results. Pinch off flower buds as they appear to encourage bushy growth and continued leaf production. Harvest regularly for best flavor and productivity. Cold temperatures cause blackening of leaves.
| Origin | African landrace × purple basil cross |
| Plant Height | Up to 30 inches — staking recommended |
| Foliage | Dark purple |
| Flavor | Refreshing — distinct from standard sweet basil |
| Kitchen Use | Adds pink-purple tint to vinegars, salads & pestos |
| Latin Name | Ocimum basilicum |
| Type | Heirloom, Open-Pollinated, Non-GMO, Annual |
| USDA Zones | 3–12 |
Packed and shipped by Box Garden Seeds LLC — heirloom seeds grown without GMOs, selected for flavor, resilience, and your garden’s success.