When to harvest lemon verbena: a practical guide

When to harvest lemon verbena : the ideal time is in summer, from June to September, when the leaves are well developed and the aromatic oils reach their maximum concentration.

• Harvest from June to September for optimal aromas
• Pick early in the morning, after the dew has evaporated
• Choose the youngest leaves located at the top of the stems
• Avoid removing more than a third of the foliage at a time
• Dry or freeze quickly to preserve the aromas

Why the harvest period makes all the difference to quality

Knowing when to harvest lemon verbena is first and foremost about understanding the life cycle of this aromatic plant. Lemon verbena, botanically known asAloysia citrodora, produces its fragrant compounds in glands located on the surface of its leaves. These compounds gradually accumulate throughout the warm season.

Outside of the summer months, the leaves are less rich in essential oils. Harvesting too early, in spring, results in pale, unscented leaves. Harvesting too late, after the first frosts, leads to damaged or browned leaves, unusable for quality infusions or drying.

Aromatic concentration is directly linked to cumulative sunlight. The more heat and light the plant receives, the more fragrant its leaves will be. This is why late July and August often represent the peak quality period for harvesting this plant.

From June to September: the ideal harvest window

The optimal harvest window for lemon verbena is from June to September in most regions of France. In June, the first well-formed leaves appear on the current year's stems. They are already sufficiently aromatic for a light first harvest.

In July and August, the plant is at its peak. The leaves are large, a deep green, and release an intense lemony fragrance when simply crushed. This is the main harvest period, the one favored by herbalists and experienced gardeners.

In September, harvesting is still possible and even recommended before the first drops in temperature. The leaves retain a good aromatic concentration, although the plant begins to slow its growth. Take advantage of this time to gather a final, abundant harvest before autumn.

If you wish to deepen your knowledge of the cultivation of this plant, planting and caring for lemon verbena will give you all the keys to obtaining a vigorous and productive plant.

The best time of day to pick

Beyond the season, the time of harvest directly influences the quality of the leaves. The best time is early morning, once the dew has evaporated but before the sun reaches its zenith. At this time, the leaves are fresh, hydrated, and their aromatic compound content is at its peak.

In the middle of the day, under intense heat, some of the volatile oils evaporate directly into the air. You can even notice this by running your hand over the leaves: they give off a lighter fragrance than in the morning. Harvesting at this time means losing some of the aromatic intensity you're trying to preserve.

By the end of the day, the plant has suffered from the day's heat stress. The leaves may be slightly wilted, which complicates drying and reduces shelf life. Therefore, the morning remains the ideal time for any quality harvest.

Which leaves to choose at harvest time

Not all lemon verbena leaves are created equal when it comes to harvesting. The most aromatic leaves are those at the top of the stems, the youngest ones, ranging from light to medium green. They contain a higher concentration of essential oils than the lower, older, and often tougher leaves.

Avoid leaves that are yellowed, spotted, or show signs of disease. These damaged leaves will affect the quality of your harvest and can introduce mold during drying. Select only healthy, well-formed leaves with a uniform appearance.

The flower stalks also deserve your attention. Just before flowering, the leaves often reach their aromatic peak. You can harvest the flowering tops along with the adjacent leaves: they are equally usable in infusions and add a subtle floral note.

How much to collect on each pass

The golden rule for harvesting lemon verbena without weakening the plant is to never pick more than a third of the foliage at one time. This limit allows the plant to continue photosynthesizing and to regenerate its leaves quickly.

Over-harvesting, which strips the stems of leaves along their entire length, stresses the plant and slows its regrowth. In extreme cases, excessive harvesting in the middle of summer can weaken the plant before winter and jeopardize its survival if temperatures drop sharply.

In practice, harvest several small, regular crops rather than one large harvest. Returning to the same plant every two to three weeks stimulates the production of new shoots and keeps the plant in a state of active growth throughout the season.

To learn more about the size of this aromatic plant and its effects on the harvest, how to prune lemon verbena explains the precise steps to take.

The right tools for a clean harvest

A good tool makes all the difference between a clean harvest and crushed stems that can become infected. Ideally, use clean, sharp herb scissors or pruning shears. A clean cut minimizes the risk of damaging the plant and promotes rapid healing.

Disinfect your tools before each use, especially if you have worked on other diseased plants. A simple wipe with 70% alcohol is sufficient to prevent the transmission of fungal or bacterial diseases from one plant to another.

To transport your harvest, opt for a wicker basket or a cloth bag rather than an airtight plastic bag. Fresh leaves need air circulation to prevent them from suffocating and starting to ferment before even reaching your kitchen or drying room.

Dry the lemon verbena after harvesting

Drying is the most common method of preserving lemon verbena after harvesting. It allows the leaves to be kept for several months while retaining much of their aroma. The simplest technique is to make small bunches of stems and hang them upside down in a dry, shady, and well-ventilated place.

Avoid drying in direct sunlight: ultraviolet rays degrade the aromatic compounds, resulting in dull, unscented leaves. An attic, hallway, or cool room with good air circulation is ideal. Drying typically takes one to two weeks, depending on ambient conditions.

You can also use a food dehydrator set to a low temperature. This method speeds up the process while limiting the thermal degradation of volatile compounds. Once the leaves are thoroughly dry, they easily detach from the stems and can be crumbled and then stored in airtight glass jars away from light.

Freezing or keeping fresh: other options

Drying isn't the only option after harvesting lemon verbena. Freezing is a quick and effective way to preserve fresh leaves. Rinse the leaves, dry them thoroughly with a clean cloth, then spread them in a single layer on a baking sheet before transferring them to a freezer bag once frozen.

This method preserves the color and most of the aroma, although the texture of the thawed leaves is less firm than when fresh. Frozen leaves are ideal for infusions, cooking, or aromatic baths.

For use within a few days of harvesting, you can simply place the stems in a glass of water in the refrigerator, like a bouquet of flowers. The leaves will remain fresh and fragrant for three to five days under these conditions. This method is ideal if you plan to use your harvest quickly in cooking or for making infusions.

Harvesting before winter: the end-of-season harvest

The question of when to harvest lemon verbena also arises at the end of the season. Before the first frosts, generally in October depending on the region, carry out a final, abundant harvest. This is the time to pick all the remaining healthy leaves before they are damaged by the cold.

This autumn harvest is often the most abundant in volume, as the plant has had the entire season to develop its foliage. The late-season leaves are slightly less aromatic than those from midsummer, but remain perfectly usable for winter infusions.

After this final harvest, you can proceed with the winterizing pruning of the plant. Pruning Verbena bonariensis follows similar principles to prepare aromatic plants for winter in good condition.

Signs that indicate the plant is ready to be harvested

Even without a precise calendar, several visual and olfactory clues indicate that the time has come to harvest lemon verbena. The first sign is the color of the leaves: a bright, uniform green, without spots or discoloration, signals a healthy plant and leaves at their most aromatic.

The second indicator is smell. Lightly crush a leaf between your fingers: if the lemony scent is intense and immediate, the plant is ready. If the smell is faint or nonexistent, wait a few more days of warmth and sunshine.

The third sign is the texture of the leaves. Firm leaves, slightly leathery to the touch, indicate a good concentration of active compounds. Soft or limp leaves, except during the midday heat, signal a lack of water or the beginning of stress, which can impair the quality of the harvest.

Using harvested lemon verbena: infusions and common uses

Once you know when to harvest lemon verbena and how to store it, the next step is how to use it. Infusion remains the most common method. A few fresh or dried leaves, steeped in simmering water for five to ten minutes, yields a beverage with a delicate, lemony aroma.

In cooking, lemon verbena leaves are used to flavor desserts, sorbets, vinaigrettes, and marinades. Their powerful aroma means that only a small amount is needed. They pair particularly well with red berries, citrus fruits, and honey.

Lemon verbena is also prized for its relaxing properties, especially as an evening infusion. The benefits of lemon verbena provide a comprehensive overview of its traditional uses and current research. To determine the best time of day to enjoy its benefits, the " When to Drink Lemon Verbena" guide provides a precise answer.

Common mistakes to avoid during harvesting

Several common mistakes are made by gardeners new to this aromatic plant. The first is harvesting too early in the season, as early as April or May, when the leaves are still too young and not very fragrant. Wait until the plant is well established and temperatures are consistently above 15°C (59°F).

The second mistake is harvesting too much at once. Removing more than half the foliage at once weakens the plant permanently and can compromise its flowering and regrowth. Always divide your harvests over several passes.

The third mistake concerns storage: leaving fresh leaves in a pile in a sealed plastic bag after picking. Without air circulation, they heat up, ferment, and lose their aroma within hours. Process your harvest quickly, ideally within two hours of picking.

To avoid these pitfalls from the outset, the benefits and uses of verbena offer you a useful overview of this plant and its best conditions of use.

Summary table: when and how to harvest lemon verbena

Combining harvesting and maintenance for a productive plant

Harvesting and caring for lemon verbena are two complementary tasks. Each harvest, if done correctly, acts as gentle pruning, stimulating branching and the production of new leaves. A regularly harvested plant is often denser and more productive than one left unattended.

Combine your harvesting sessions with careful observation of the plant. Take this opportunity to remove dead leaves, watch for signs of pests or diseases, and check the soil condition. Proper watering after a heavy harvest helps the plant compensate for leaf loss and recover quickly.

At the end of the season, after the last harvest, shaping the plant prepares it for winter. This guide to pruning lemon verbena details the precise steps for this operation. For a perfect infusion with your harvested leaves, lemon verbena and mint tea, with its beneficial properties, offers a particularly appreciated aromatic combination.

Harvesting lemon verbena from pots or planters

Lemon verbena grown in pots or planters follows the same harvesting rules as that planted in the ground. The ideal time remains summer, from June to September. The main difference lies in the size of the plant: a pot limits root development and therefore the overall vigor of the plant.

When pruning a potted plant, be even more careful with the amount of fertilizer removed. Do not remove more than a quarter of the foliage at a time, as the plant has fewer reserves to regenerate. Compensate with regular watering and appropriate nutrient supply to maintain good vigor.

The advantage of growing it in a pot is its portability: you can bring the plant indoors as the first frosts approach, thus extending the harvest season by a few extra weeks. In a well-lit apartment, some gardeners manage to harvest small quantities of leaves until November. The beneficial properties of verbena tea make you want to enjoy every last leaf you pick.

Frequently asked questions about when to harvest lemon verbena

In which month do we start harvesting lemon verbena?

The first light harvest is possible as early as June, once the plant has resumed growth after winter and temperatures are consistently mild. The June leaves are already fragrant, although their aromatic concentration is still lower than that of July and August. Wait until the stems are well-furnished before harvesting.

Can lemon verbena be harvested in autumn?

Yes, lemon verbena can be harvested in September and October, before the first frosts. In September, the aromatic quality remains good. In October, the leaves are less concentrated in essential oils but still usable. Take advantage of this period to harvest at the end of the season and build up your reserves for winter, either dried or frozen.

What time of day is ideal for picking lemon verbena?

Morning is the best time to harvest lemon verbena. Wait until the dew has evaporated, usually between 8 and 10 a.m. depending on the weather, then pick before the sun gets too high. At this time, the leaves are fresh and their aromatic compounds are at their peak. Avoid harvesting at midday or in the late afternoon.

How can you tell if the leaves are ready to be harvested?

Gently crush a leaf between your fingers. If it immediately releases a strong lemon scent, the plant is ready to be harvested. Also observe the color: bright, uniform green leaves, firm to the touch, without spots or discoloration, indicate good maturity. Pale, limp, or faintly scented leaves suggest it's best to wait a few more days.

How many times can lemon verbena be harvested in a season?

You can harvest lemon verbena several times per season, ideally every two to three weeks between June and September. Regular, moderate harvesting stimulates the production of new shoots and keeps the plant active. Avoid more than four or five large harvests from the same plant in a season to prevent it from becoming exhausted before winter.

Should harvesting take place before or after flowering?

Both are possible. Just before flowering, the leaves often reach their aromatic peak: this is an excellent time for a main harvest. After flowering, the leaves remain usable, but their aromatic concentration may decrease slightly. You can also harvest the flowering tops themselves, which provide a pleasant floral note in infusions.

Which parts of the plant should be harvested first?

Choose the youngest leaves at the top of the stems, as these are the richest in aromatic compounds. The lower leaves, older and often tougher, are less fragrant. You can also harvest the flowering tops along with their adjacent leaves. Avoid yellowed, damaged, or spotted leaves, as these will affect the quality of the final harvest.

How to preserve lemon verbena after harvesting?

Three methods are available. Drying in the shade in a well-ventilated area allows for storage of several months. Freezing preserves aromas well for infusions and culinary uses. Storing in the refrigerator in a glass of water is suitable for use within three to five days of harvesting. Regardless of the method chosen, process your harvest quickly after picking.

Can lemon verbena be harvested from a pot?

Yes, harvesting lemon verbena grown in pots follows the same rules as when grown in the ground. The ideal time remains June to September. Simply be more careful with the quantities harvested: do not exceed a quarter of the foliage at a time, as a potted plant has fewer reserves to regenerate. Compensate with regular watering and fertilization.

Does harvesting stimulate the growth of lemon verbena?

Yes, a well-executed harvest acts like gentle pruning and stimulates branching. By cutting the tips of the stems, you encourage the plant to produce new lateral shoots, making it denser and more productive throughout the season. This is why small, regular harvests are preferable to one large, overly aggressive harvest.

Can lemon verbena be harvested in the rain?

It is not recommended to harvest lemon verbena in the rain or immediately after a downpour. Wet leaves are more difficult to dry and are likely to mold quickly if they are not dried soon after picking. Wait until the foliage is completely dry before harvesting. In case of prolonged rain, postpone harvesting until the first sunny morning.

What if you missed the summer harvest period?

If you weren't able to harvest lemon verbena during the summer, picking it in September or early October is still possible and worthwhile. The leaves are still fresh and aromatic enough to be dried or frozen. As a last resort, a few leaves harvested in October, even if less fragrant, are better than nothing for building up a small winter supply of homemade infusions.

Key takeaways

Knowing when to harvest lemon verbena means respecting the natural rhythm of this aromatic plant. The ideal window is from June to September, with a peak in July and August, early in the morning, picking young, healthy leaves without ever removing more than a third of the foliage. Regular and well-managed harvesting stimulates the plant and guarantees fragrant leaves throughout the season.

The quality of your harvest depends as much on the timing as on the post-picking care. Quickly dry or freeze your leaves to preserve their aroma until winter. And don't forget the last harvest in October, before the frosts, to build up your herbal tea reserves for the colder months.

Practical action: Starting next June, schedule a weekly morning harvest of your lemon verbena. Crush a leaf before each harvest to check the aromatic intensity, and dry your harvest in a shady, well-ventilated spot. This way, you'll have a supply of fragrant leaves for the whole year.