Purple Basil

Purple Basil: A Striking Herb with Bold Flavor and Beauty

Purple basil (Ocimum basilicum) is a vibrant and visually striking variety of basil known for its deep purple leaves and mild, slightly spicy flavor. A favorite among gardeners and chefs, purple basil combines aesthetic appeal with culinary versatility, making it an exceptional choice for both ornamental and practical purposes. Its unique coloration comes from high concentrations of anthocyanins, the same antioxidants found in blueberries and other purple-hued plants. This adds a touch of elegance to dishes and provides potential health benefits.

Unlike green basil varieties, purple basil has a flavor profile that is milder and slightly more peppery, with hints of clove and cinnamon. This makes it ideal for both sweet and savory dishes where a subtler basil flavor is desired. The most popular varieties of purple basil include Dark Opal, Purple Ruffles, and Amethyst Improved, each offering slightly different flavors and leaf shapes. These varieties are often used as both culinary herbs and decorative accents in gardens or on plates.

In the kitchen, purple basil is as versatile as it is beautiful. Its vibrant leaves are often used fresh in salads, where their bold color contrasts with greens. It can also be incorporated into pasta dishes, pesto, and sauces, though it’s important to note that cooking can dull its striking purple hue. To preserve its color, many chefs prefer to use it raw or add it as a garnish just before serving. Purple basil is also excellent for creating infused oils, vinegars, and syrups, which take on the herb’s unique flavor and beautiful purple tint. Its slightly spicy undertones make it a natural fit for cocktails, teas, and other beverages, adding both flavor and visual appeal.

Beyond the kitchen, purple basil is appreciated for its ornamental value. Its dark foliage adds depth and contrast to herb gardens, flower beds, and container arrangements. Purple basil plants also produce small pink or lavender flowers, which are edible and can be used to decorate dishes or drinks. Additionally, the flowers attract pollinators like bees and butterflies, making it a beneficial addition to eco-friendly gardens.

Purple basil is relatively easy to grow, thriving in warm climates with plenty of sunlight and well-drained soil. It is also well-suited to hydroponic systems, where its growth can be optimized with consistent nutrients and water. Regular pruning encourages bushy growth and prevents flowering, which can alter the flavor of the leaves. Like other basil varieties, purple basil is an annual plant and will require replanting each year in most climates.

The health benefits of purple basil are an added bonus. Its anthocyanin content provides antioxidant properties, which may help reduce inflammation and promote overall wellness. The essential oils in purple basil are also known for their antimicrobial and calming effects, making it a potential ingredient in natural remedies or skincare products.

Purple basil is more than just a culinary herb—it’s a showstopper in the garden and on the plate. Whether used to elevate the visual appeal of a dish, flavor oils and beverages, or beautify a landscape, purple basil offers a unique combination of aesthetic beauty, culinary versatility, and health benefits. Its bold appearance and distinctive flavor make it a must-have for anyone looking to add a touch of elegance and creativity to their cooking or gardening endeavors.

Growing Purple Basil in a Kratky Jar

Purple basil does well in a Kratky jar, the passive hydroponic method with no pump or timer. The plant sits in a net cup over a jar of nutrient solution. As the water level drops, an air gap forms. The upper roots take in air there and the lower roots stay in the solution. You fill the jar, set the plant and let it grow.

Start seeds in rockwool or another soilless medium and keep them warm and damp. When the seedlings have true leaves and white roots show at the bottom of the plug, move the cup into a jar with the water just touching the bottom. Wrap the jar in foil or use a dark jar so algae cannot grow in the solution.

Keeping the Purple Color Deep

The dark color of purple basil comes from pigments that deepen in strong light. In weak light the leaves tend to look greener and less striking, so give the plant a bright window or a grow light for most of the day. Warmth matters too. Keep purple basil in the same range as other basil, about 70 to 85°F, and out of cold drafts. A pH of 5.5 to 6.5 and a balanced hydroponic nutrient will keep growth steady.

Harvesting and Using Purple Basil

Pick leaves from the top of each stem and cut just above a pair of leaves so the plant branches, as described in our guide to pruning basil.
Pinch off flower buds when they appear if you want leaves. The flowers are pretty and edible, but the plant makes fewer leaves once it blooms.
Use the leaves fresh as a garnish, in salads, or to color vinegar and oils. Cooking fades the color, so add them at the end.

Combining Purple Basil with Other Varieties

Purple basil looks beautiful next to green jars of sweet basil and lemon basil, and it adds color to a windowsill or kitchen counter. If you want to try more, see all of our basil varieties and our basil uses and recipes for ideas on what to cook with each one.