Borage in Zone 9A — Gulf Coast

Borage is a fantastic addition to any Gulf Coast garden. The star-shaped blue flowers are not only beautiful, but they attract pollinators and beneficial insects. Plus, the leaves have a refreshing cucumber-like flavor, perfect for summer salads. Given our long growing season, you can enjoy borage for a good portion of the year.

We all know the challenges of gardening in the Gulf Coast: high humidity and disease pressure, especially during our long, hot summers. But with a little planning and attention to timing, you can successfully grow borage and enjoy its benefits throughout our 303-day growing season.

While borage prefers direct sowing, you *can* transplant it if you get a head start. Aim to transplant in late January through late February. This gives the plants time to establish before the full force of our summer heat hits.

Before transplanting, harden off your seedlings by gradually exposing them to outdoor conditions for about a week. This will help them adjust to the sun and humidity. Space the plants 12-18 inches apart to allow for good air circulation, which is crucial in our humid climate. Keep an eye on the weather forecast; a late cold snap is always possible, so be ready to cover your young plants if needed.

Direct sowing is the easiest way to grow borage here in the Gulf Coast. Sow seeds early February through early October. Borage germinates best when the soil temperature is consistently around 60-70°F.

Prepare your soil by loosening it and adding some compost. Sow seeds about ½ inch deep and 12-18 inches apart. Keep the soil consistently moist until the seedlings emerge. Borage is easy to direct sow and self-seeds readily, so be prepared to have it pop up in unexpected places!

Borage needs moderate watering, especially during our hot Gulf Coast summers. While it's relatively easy-going, it's not drought-tolerant and will suffer if left dry for too long.

During the hotter months, especially when we aren't getting our typical afternoon storms, check the soil moisture regularly. Stick your finger about two inches deep into the soil; if it feels dry, it's time to water. Aim for about 1 inch of water per week, either from rainfall or irrigation. Water at the base of the plant to avoid getting the leaves wet, which can encourage fungal diseases in our humid environment.

Signs of underwatering include wilting leaves and slow growth. Overwatering, on the other hand, can lead to root rot, so watch for yellowing leaves and a generally unhealthy appearance. Mulching around your borage plants with pine straw or wood chips can help retain moisture and suppress weeds, which is a big help in our climate.

You can expect your first borage harvest in early April through mid December, about 55 days after sowing. Look for the star-shaped blue flowers to be fully open. These are not only beautiful but also edible!

The young leaves are also edible and have a mild, cucumber-like flavor. Harvest the leaves and flowers as needed, being careful not to damage the plant. Regular harvesting encourages continued production. As our first frost approaches in early December, you can let the remaining flowers go to seed if you want borage to self-sow for the following year.

Here are some common problems you might encounter with borage in the Gulf Coast:

Self-seeding aggressively

• What it looks like: Borage popping up everywhere in your garden, even where you didn't plant it.
• What causes it: Borage readily self-seeds, and the seeds are easily spread by wind and animals. Our long growing season gives them plenty of time to germinate.
• How to fix/prevent it: Deadhead flowers before they go to seed. Pull up unwanted seedlings as they appear. Consider growing borage in containers to limit its spread.

Powdery mildew

• What it looks like: White or grayish powdery coating on leaves, stems, and sometimes flowers. Leaves may curl, yellow, and die.
• What causes it: This fungal disease thrives in our warm days, cool nights, and moderate to high humidity.
• How to fix/prevent it: Improve air circulation by spacing plants properly and pruning as needed. Remove affected leaves promptly. Neem oil or potassium bicarbonate sprays can help. A milk spray (1 part milk to 9 parts water) is also surprisingly effective.

Can become leggy

• What it looks like: Tall, spindly plants with fewer leaves, especially lower down.
• What causes it: Insufficient sunlight or overcrowding can cause borage to become leggy as it reaches for more light.
• How to fix/prevent it: Ensure your borage plants are getting at least 6 hours of sunlight per day. Thin out crowded plants to improve air circulation and light penetration.

Gulf Coast Specific Challenges: Our hot heat, very-high humidity, and wet-year-round rainfall create ideal conditions for fungal diseases like powdery mildew. Regular monitoring and proactive measures are essential to keep your borage healthy.

Borage is a great companion plant for many vegetables and herbs in your Gulf Coast garden. It's particularly beneficial for tomatoes because it attracts pollinators, leading to better fruit set. It also helps deter tomato hornworms. Squash and cucumbers also benefit from the increased pollination that borage provides. Strawberries enjoy the company of borage as it can help deter pests that like to feed on the berries.

There aren't any significant bad companions for borage, but avoid planting it too close to other plants that are susceptible to powdery mildew, as it can spread the disease.