Lemon Balm in Zone 8A — Texas

Lemon Balm is a fantastic addition to any Texas garden. Its citrusy, minty flavor brightens teas, salads, and even desserts. Plus, it's incredibly easy to grow, providing a satisfying harvest throughout our long growing season.

Our unpredictable weather and brutal Texas heat can be a challenge, but Lemon Balm is surprisingly resilient. With a bit of planning and attention, you can enjoy a thriving patch from spring well into fall, thanks to our generous 260-day growing season.

Starting Lemon Balm indoors isn't strictly necessary in our climate, but it can give you a head start, especially if you're eager for an early harvest. Starting seeds indoors from mid January through early February gives them a jump before our early spring kicks into gear.

Use seed trays with a good seed-starting mix, keep them consistently moist (bottom watering is a great trick!), and provide a warm location with plenty of light – a sunny windowsill or grow lights will do the trick. Remember, our spring can arrive early, so starting indoors allows you to transplant strong seedlings once the weather cooperates.

Transplanting Lemon Balm outdoors is best done from early March through early April. This gives the plants time to establish themselves before the full force of the Texas heat arrives.

Before transplanting, harden off your seedlings by gradually exposing them to outdoor conditions for about a week. Space them 18-24 inches apart in a well-drained location. Keep an eye on the forecast for late freezes; be prepared to cover your young plants if a cold snap threatens.

Direct sowing Lemon Balm is a perfectly viable option in Texas, and it's less work! You can sow seeds directly into the garden from early March through late August.

Choose a location with well-drained soil and prepare the bed by loosening the soil and removing any weeds. Sprinkle the seeds thinly over the surface, gently press them into the soil, and keep the area consistently moist until germination. Thin seedlings to 18-24 inches apart. Direct sowing works best when the soil has warmed up a bit.

Lemon Balm appreciates consistent moisture, especially during our hot Texas summers, but it doesn't like to be waterlogged. During the spring and fall, when temperatures are milder and rainfall is more frequent (though unpredictable), water deeply about once a week, or whenever the top 2 inches of soil feel dry to the touch – use the "finger test."

In the heat of summer, you may need to water every other day, or even daily if the plants are in full sun. Aim for about 1 inch of water per week, either from rainfall or irrigation. Water at the base of the plant to avoid wetting the foliage, which can encourage fungal diseases, especially with our variable humidity.

Signs of underwatering include wilting and yellowing leaves. Overwatering can lead to root rot, indicated by soft, mushy stems and leaves. A good layer of mulch around your Lemon Balm plants will help retain moisture in the soil and suppress weeds, which is especially useful during our periods of drought.

Lemon Balm benefits from minimal pruning to keep it tidy and productive. In midsummer, when the plant may start to look a little leggy, cut it back by about half to encourage new growth.

Regularly remove any flower stalks that appear, as this will prevent the plant from self-seeding aggressively. As the first frost approaches around mid- November, you can give the plant one final trim, but leave some foliage to help it overwinter.

You can start harvesting Lemon Balm leaves as early as mid May, about 70 days after planting, and continue harvesting throughout the growing season until late November. The leaves have the best flavor before the plant flowers, so harvest frequently to encourage new growth and delay flowering.

To harvest, simply snip off the stems with scissors or garden shears, taking care not to damage the main plant. Use the leaves fresh, as they lose much of their flavor when dried. Consistent harvesting will promote continued production and keep your Lemon Balm plant healthy and vigorous. As frost approaches, harvest any remaining leaves for immediate use or to freeze for later.

Here are the top 3 problems you might encounter with Lemon Balm in Texas:

Aggressive Spreading

• What it looks like: Lemon Balm popping up in unwanted areas of your garden.
• What causes it: Lemon Balm spreads easily via seeds and rhizomes. It thrives in our long growing season, giving it ample time to expand.
• How to fix/prevent it: Grow Lemon Balm in a container to restrict its spread. Remove flower stalks before they go to seed. Dig up and remove unwanted plants promptly.

Bolting

• What it looks like: The plant sends up a flower stalk prematurely. The leaves may become bitter or tough.
• What causes it: Bolting can be triggered by the Texas heat, long days, or drought stress.
• How to fix/prevent it: Plant Lemon Balm in a location that receives some afternoon shade. Keep the soil consistently moist. Regularly harvest leaves to delay flowering.

Powdery Mildew

• What it looks like: A white or grayish powdery coating on the leaves and stems. Leaves may curl, yellow, and die.
• What causes it: Powdery mildew thrives in warm days, cool nights, and moderate humidity, which we often experience during spring and fall in Texas.
• How to fix/prevent it: Improve air circulation by spacing plants properly and pruning as needed. Remove affected leaves. Apply neem oil or potassium bicarbonate sprays.

Texas Specific Challenges: The combination of hot-to-extreme heat, variable humidity, and unpredictable rainfall in Texas can stress Lemon Balm. Providing adequate water during dry spells, offering some afternoon shade, and ensuring good air circulation are key to keeping your plants healthy and productive. Watch out for fire ants when you're working in the garden!

Lemon Balm makes a great companion plant for several vegetables in the Texas garden:

• Tomatoes: Lemon Balm can help repel pests that commonly attack tomatoes, such as whiteflies and tomato hornworms.
• Squash: The strong scent of Lemon Balm can deter squash bugs and vine borers, which are common problems for squash in Texas.
• Broccoli and Cauliflower: Lemon Balm can attract beneficial insects that prey on cabbage worms and other pests that target these brassicas.

Avoid planting Lemon Balm near members of the mint family, as they can compete for resources and may attract similar pests.