Ornamental Basil
Cardinal Basil is a stunning culinary herb from Israel that marries ornamental drama with exceptional kitchen performance. Its plants reach 3 to 6 feet tall, crowned with rich purple flower heads so showy they rival cut flowers in arrangements. The spicy-sweet leaves mature in 60 to 75 days and thrive in zones 7 to 10, delivering remarkable flavor for salads, soups, curries, and Mexican and Asian dishes. Deer leave it alone, hummingbirds flock to its blooms, and it tolerates challenging soil with aplomb.
Full Sun
Moderate
7-10
72in H x 24in W
Annual
High
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The massive, deep purple flower clusters are the first thing gardeners notice, and they're genuinely beautiful enough to cut for the vase. Beneath those showy blooms sits a culinary workhorse; the leaves carry a complex spicy-sweet character that transforms curries and soups with just a handful. It's developed in Israel and grown as an heirloom, meaning it breeds true from seed and gets better the more you save and replant. Low-maintenance and drought-tolerant once established, it thrives on neglect while producing abundantly.
The leaves excel in salads where their spicy-sweet character shines without heavy cooking, and they transform soups and curries by bringing layered flavor and aromatic depth. Fresh applications capture the leaves at their brightest; use them raw in Mexican and Asian dishes, or add them at the end of cooking to preserve their volatile oils. The dramatic purple flowers are equally valuable, offering visual impact in both garden borders and fresh cut arrangements. Even as a living plant in the garden, it serves the dual purpose of food production and ornamental focal point.
Start seeds indoors 4 to 6 weeks before your transplant date. Sow at a depth of 1/4 inch in soil held at 60 to 65 degrees Fahrenheit, ideally up to 85 degrees. Seeds sprout in 6 to 10 days. Transplant seedlings outdoors once nighttime temperatures consistently stay above 50 degrees Fahrenheit.
Transplant outside 1 to 2 weeks after your average last frost date, when soil temperature reaches at least 60 degrees Fahrenheit. Space plants 8 inches apart. Harden off seedlings by gradually exposing them to outdoor conditions over several days before planting.
Direct sow outside 1 to 2 weeks after your average last frost date, when soil temperature is at least 60 degrees Fahrenheit. Sow at 1/4 inch depth and thin seedlings to one plant every 12 inches when they reach 2 inches tall. For continuous harvests, make successive sowings every 3 weeks.
Begin harvesting leaves once the plant is established, typically 60 to 75 days after sowing. Pinch leaves from the top of the stem and work downward; this stimulates bushier growth. Harvest in the morning after dew dries but before the heat of the day to capture peak flavor and aroma. The plant produces continuously through the growing season, so regular harvesting actually encourages more leaf production. For the best spicy-sweet flavor, use leaves fresh in salads and dishes.
Pinch off the growing tips regularly to encourage bushier, fuller growth and delay flowering. As the plant matures toward its 3 to 6-foot height, removing the top 4 to 6 inches of stems promotes branching and maximizes leaf production. Allow some flower clusters to develop if you want to enjoy their ornamental impact and attract hummingbirds; deadheading spent flowers extends the leaf harvest.
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“Cardinal Basil emerged from Israeli plant breeding, developed to combine the ornamental impact of purple-flowered basils with serious culinary credentials. It represents the heirloom tradition where a variety proves itself worthy of preservation not through accident but through deliberate selection for traits gardeners actually want: stunning flowers, true-breeding seed, and flavor that matters in the kitchen. By being preserved and passed among seed savers, it has earned its place in heirloom catalogs where it continues to reward gardeners who plant it.”