Lemon Balm in Zone 7A — Texas

Lemon Balm is worth its weight in gold in Texas. Its bright, lemony flavor adds zest to teas, salads, and even desserts. Plus, growing your own means you always have fresh herbs on hand, no matter how unpredictable the weather gets.

We all know gardening in Texas comes with its own set of challenges, from the brutal Texas heat to surprise freezes. But with a little planning and attention to timing, you can absolutely enjoy a thriving Lemon Balm patch during our long 245-day growing season.

Starting Lemon Balm indoors gives you a head start, especially if you're aiming for that early spring harvest. Begin in late January through mid February, about six weeks before you plan to transplant. Use seed trays with a good seed-starting mix, keep them warm, and provide plenty of light – a simple grow light works wonders.

Don't forget to water from the bottom to encourage strong root growth and prevent damping off. Since spring comes early here, getting those seedlings going indoors gives them a fighting chance against any late cold snaps.

Transplant your Lemon Balm seedlings outdoors in mid March through mid April, once the danger of frost has passed. Harden them off for about a week beforehand by gradually exposing them to outdoor conditions. This helps them adjust to the Texas sun and wind.

Space your plants about 18-24 inches apart to give them room to grow. Keep an eye on the weather forecast – a late freeze can still happen, so be ready to cover your young plants if needed.

Direct sowing is another viable option, and it's super easy. Sow your Lemon Balm seeds directly into the garden from mid March through late August. Choose a spot with well-drained soil and prepare the area by removing any weeds and loosening the soil.

Keep the soil consistently moist until the seedlings emerge. The biggest advantage is less fussing with baby plants. The downside is that germination can be a little slower and you'll need to thin the seedlings to 18-24 inches apart.

Lemon Balm needs moderate watering to thrive in our Texas climate. During the hotter months, especially, consistent moisture is key, but avoid waterlogged soil. Remember, even though it tolerates more moisture than some other herbs, it's not drought-tolerant.

A good rule of thumb is to check the soil about two inches deep – if it feels dry, it's time to water. Aim for about 1 inch of water per week, either from rainfall or irrigation. In the variable humidity we often experience, watering at the base of the plant is best to avoid fungal issues.

Watch for signs of underwatering, like wilting leaves, or overwatering, like yellowing leaves. Mulching around your Lemon Balm plants with organic matter like shredded leaves or wood chips will help retain moisture and suppress weeds, which is a must in our long growing season.

Pruning Lemon Balm is pretty straightforward. The main thing is to cut back the plant by about half in midsummer to prevent it from getting leggy and encourage new growth. Also, remove any flower stalks as soon as you see them. This prevents the plant from self-seeding aggressively.

Throughout the growing season, feel free to harvest leaves as needed. As the first frost approaches around mid- November, you can give your Lemon Balm a final trim. This encourages it to conserve energy for the winter.

You can expect your first Lemon Balm harvest starting in late May and continuing through late November in Texas. The best time to harvest is before the plant flowers, as the leaves have the most intense flavor then. Look for healthy, vibrant green leaves as your indicator.

To harvest, simply snip off the stems with a pair of scissors or pruning shears, taking care not to damage the plant. Regular harvesting encourages the plant to produce even more leaves. As we approach the first frost in mid- November, harvest as much as you can and consider preserving some for winter use.

Lemon Balm is generally easy to grow, but here are a few common problems you might encounter in Texas:

Aggressive Spreading

• What it looks like: Lemon Balm popping up everywhere in your garden, even where you didn't plant it.
• What causes it: Lemon Balm spreads easily through its roots and seeds.
• How to fix/prevent it: Plant Lemon Balm in a container to restrict its spread. Remove flower stalks before they go to seed. Be diligent about pulling up unwanted seedlings.

Bolting

• What it looks like: The plant sends up a flower stalk prematurely, and the leaves become bitter or tough.
• What causes it: Triggered by heat and drought stress, both common occurrences in our Texas summers.
• How to fix/prevent it: Plant in partial shade, especially during the hottest part of the day. Keep the soil consistently moist. Harvest regularly to encourage leaf production.

Powdery Mildew

• What it looks like: White or grayish powdery coating on leaves and stems.
• What causes it: Fungi that thrive in our warm days and variable humidity, especially when air circulation is poor.
• How to fix/prevent it: Improve air circulation by spacing plants properly and pruning. Remove affected leaves. Apply neem oil or potassium bicarbonate sprays. A milk spray (1 part milk to 9 parts water) can also be effective.

Texas Specific Challenges: The hot-to-extreme heat and variable humidity of our Texas summers can stress Lemon Balm, making it more susceptible to bolting and powdery mildew. Consistent watering and providing some afternoon shade are crucial for success. Fire ants can also be a nuisance, so be sure to treat them if they become a problem around your plants.

Lemon Balm makes a great companion plant for several vegetables in the Texas garden. Plant it near tomatoes to help repel pests like tomato hornworms. It also benefits squash by attracting pollinators. Broccoli and cauliflower also benefit from Lemon Balm's pest-repelling properties.

Avoid planting Lemon Balm near rue, as they can inhibit each other's growth. Keep in mind that Lemon Balm can be aggressive, so give it enough space to prevent it from crowding out its companions.