Updated: July 26, 2023

Purple basil is a beautiful and aromatic herb that can add a pop of color to any garden. With its vibrant purple leaves and unique flavor, it is not only a great addition to your culinary endeavors but also an attractive plant to have in your outdoor space. Growing purple basil outdoors is relatively easy, as long as you provide the right conditions and care for it properly. In this article, we will guide you through the steps of growing purple basil plant outdoors.

Choosing the Right Location

First and foremost, you need to select a suitable location for your purple basil plant. Basil plants require at least 6-8 hours of direct sunlight each day, so choose a spot in your garden that receives ample sunlight. Ensure that the area is well-drained and has fertile soil.

Preparing the Soil

Before planting your purple basil, prepare the soil by loosening it with a garden fork or tiller. Remove any weeds or debris from the area. Purple basil prefers slightly acidic soil with a pH level between 6.0 and 7.5. If your soil is alkaline, consider adding organic matter such as compost or peat moss to adjust the pH level.

Planting Purple Basil

Purple basil can be grown from seeds or transplants. If you choose to start from seeds, sow them indoors about 6-8 weeks before the last frost date in your region. Fill a seed tray or small pots with seed-starting mix and sprinkle the seeds on top. Lightly cover the seeds with a thin layer of soil and keep them moist until they germinate.

If you prefer using transplants, purchase healthy seedlings from a local nursery or garden center. Transplants are easier to handle and establish quickly in the garden.

When planting purple basil outdoors, make sure to space the plants about 12-18 inches apart to allow air circulation and prevent overcrowding. Dig a hole slightly larger than the root ball of the transplant or seedling, place it in the hole, and cover it with soil. Gently pat down the soil around the plant to ensure good contact.

Watering and Fertilizing

Watering is crucial for the healthy growth of purple basil plants. Keep the soil consistently moist but not waterlogged. Avoid overhead watering, as wet foliage can promote diseases. Instead, water at the base of the plant and allow the soil to dry out slightly between waterings.

Fertilize your purple basil every 2-3 weeks during the growing season with a balanced organic fertilizer. This will provide the necessary nutrients for vigorous growth and enhance its flavor.

Pruning and Harvesting

Regular pruning is essential for maintaining the shape and productivity of purple basil plants. Pinch off the tips of the plant when it reaches about 6 inches in height to encourage bushier growth. This will also prevent your basil from flowering too early, as flowering can reduce its leaf production.

To harvest purple basil, wait until the plant has grown a few sets of leaves. Use clean garden shears or scissors to cut off individual leaves or stems just above a pair of leaves. Avoid removing more than one-third of the plant at a time to allow it to continue growing.

Pests and Diseases

While purple basil is generally a hardy plant, it can still be susceptible to pests and diseases. Common pests that may attack your basil plants include aphids, spider mites, and slugs. Monitor your plants regularly and take appropriate measures such as using insecticidal soap or organic pest control methods if necessary.

Fungal diseases like powdery mildew can affect basil plants, especially in humid conditions. To prevent this, avoid overhead watering, provide adequate spacing between plants for air circulation, and remove any infected leaves promptly.

Overwintering Purple Basil

Purple basil is an annual herb, which means it completes its life cycle in one growing season. However, if you wish to extend its lifespan, you can try overwintering it indoors. Before the first frost, dig up your purple basil plant and transplant it into a pot with well-draining soil. Place it in a sunny window and continue to care for it as you would outdoors. With proper care, your purple basil may survive throughout the winter and provide fresh leaves for culinary use.

Conclusion

Growing purple basil outdoors can be a rewarding experience. By providing the right conditions of sunlight, soil, water, and fertilizer, you can enjoy a bountiful harvest of vibrant purple leaves with a delightful aroma and flavor. Remember to prune regularly, keep an eye out for pests and diseases, and consider overwintering your purple basil if you want to enjoy it year-round. With these tips in mind, you are now ready to start growing your own purple basil plant outdoors. Happy gardening!