Lemon verbena (Aloysia citrodora, also sold as A. triphylla) is a tender, deciduous woody shrub grown for its lemon-scented leaves. Give it sun, drainage and protection from cold. A container is often the easiest choice where winters are too cold for it outdoors.
1. Choose the right site
The RHS plant profile recommends a sunny, sheltered position and well-drained soil. Allow for the mature plant rather than the size of its nursery pot. If you intend to move it each winter, choose a container you can handle and decide where it will overwinter before buying it.
2. Start with a healthy plant or cutting
A labeled nursery plant is a straightforward starting point. Softwood or tip cuttings are another option; do not assume seed sold under a similar common name will produce the same herb. Use clean equipment and an appropriate propagation method, keeping leaves above the rooting medium and avoiding a saturated, airless container.
Transplant after cold weather has passed, keeping the plant at its previous soil level. A pot needs drainage holes and a suitable potting mix. Gradually acclimate a plant raised indoors to outdoor light and weather.
3. Water according to the soil
Check moisture rather than watering automatically twice a week. During active growth, keep the root zone reasonably evenly moist while allowing excess water to drain. Weather, pot size and the growing medium determine how quickly it dries. Empty water that accumulates in a saucer.
Wilting does not always mean the plant needs more water. Check the medium first; a waterlogged root system can also cause poor growth. A dry surface alone does not reveal the condition deeper in a large pot.
4. Feed in response to growth
Illinois Extension’s lemon verbena guide describes regular feeding for actively growing container plants. Follow the fertilizer’s concentration and application directions, accounting for any fertilizer already in the potting mix. Garden soil and containers should not automatically receive the same treatment.
Reduce feeding as growth slows. More fertilizer will not correct inadequate light, damaged roots or a pot without drainage.
5. Shape the plant without stripping it
Harvesting shoot tips and occasional pruning help keep growth manageable. Leave enough healthy foliage for recovery and avoid a heavy harvest from a small or stressed plant. Do not assume that flowering stops all leaf production or that every plant needs a severe autumn cutback.
Use clean, sharp tools and remove dead or damaged material when identified. Check local guidance for major pruning, especially where cold may damage tender new growth.
6. Arrange winter protection early
In cold regions, move the container to protection before frost. Illinois Extension recommends a bright indoor position. Leaf drop can occur as this deciduous shrub slows down, so a bare plant is not automatically dead; check its stems and growing conditions before discarding it.
Water less as the plant uses less moisture, but monitor the root ball rather than abandoning it until spring. A cool dormant plant and a leafy plant in a warm bright room have different demands. Do not rely on a single leaf-drop temperature to decide when to bring it inside.
7. Inspect for pests
Check leaf undersides, shoot tips and the pot before moving it indoors. Scent does not guarantee freedom from pests, and leaf loss does not guarantee that no pests remain. Isolate an affected plant and identify the problem before treating it.
If a pesticide is needed, use only one labeled for the plant, pest and intended edible use, following all directions and harvest restrictions. “Natural” does not make a spray suitable for culinary herbs. Do not use a generic spray simply because harvesting has just finished.
8. Harvest a little at a time
Take clean, healthy leaves as needed during active growth. Spread harvesting around the plant and give it time to replace removed growth. Avoid leaves from a plant whose identity or treatment history is uncertain.
Wisconsin Horticulture describes lemon verbena as a tender shrub whose leaves retain their scent when dried. Its common name should not be confused with lemon balm or ornamental verbenas.
9. Dry, label and use the leaves
Dry clean leaves with good airflow and store them only once fully dry, in a labeled sealed container. Check stored leaves for moisture or mold and discard spoiled material. Keep dried herbs away from excess heat and light.
Use a small amount to flavor an appropriate recipe, adjusting to taste. Growing the herb for cooking does not establish any medicinal benefit, and concentrated extracts are a different product from culinary leaves.
