Lemon Thyme (Thymus X Citriodorus)

Plant: Table of Contents

Lemon Thyme (Thymus x citriodorus): A Fragrant Addition to Your Garden


Lemon thyme (Thymus x citriodorus) is a delightful herb that adds both visual appeal and a burst of citrus fragrance to any garden. This herb has been cherished for centuries for its culinary, aromatic, and medicinal properties. In this article, we will delve into the fascinating world of lemon thyme, exploring its cultural significance, its uses, and its importance in plant care and propagation.

What is Lemon Thyme (Thymus x citriodorus)?

Lemon thyme, scientifically known as Thymus x citriodorus, is a perennial herb and a member of the mint family, Lamiaceae. It is a hybrid of common thyme (Thymus vulgaris) and lemon-scented thyme (Thymus pulegioides). This results in a plant with a unique combination of flavors and aromatic compounds that distinguish it from other thyme varieties.

Key Takeaways – Lemon Thyme (Thymus x citriodorus)

  • Botanical Name: Thymus x citriodorus
  • Common Names: Lemon thyme, citrus thyme
  • Family: Lamiaceae
  • Uses: Culinary, aromatic, medicinal
  • Fragrance: Citrusy, lemon-scented
  • Flavor: Delicate, lemony with undertones of thyme
  • Growth Habit: Low-growing, spreading
  • Foliage: Small, green, and aromatic leaves


Understanding the cultural requirements of lemon thyme is crucial for successfully growing and maintaining this herb. Let’s explore the key cultural aspects of lemon thyme, including its water, sunlight, fertilizer, soil, and pruning needs.


Lemon thyme thrives in well-draining soil and prefers to be kept moderately moist. It is essential to allow the soil to dry out slightly between watering to prevent root rot. When watering, aim to keep the soil consistently moist but not waterlogged, as excessive moisture can lead to fungal issues and poor growth.


This herb enjoys full sun, requiring a minimum of 6-8 hours of direct sunlight daily for optimal growth and essential oil production. Insufficient sunlight may result in leggy growth and reduced aromatic qualities. In regions with scorching summers, providing partial shade during the hottest part of the day can be beneficial.


Lemon thyme is not particularly heavy feeder. However, applying a balanced, organic fertilizer in early spring as new growth emerges can promote healthy foliage and enhance its essential oil content. Choose a fertilizer with a lower nitrogen content to avoid excessive vegetative growth at the expense of essential oil production.


Well-drained, loamy soil with a slightly alkaline to neutral pH is ideal for lemon thyme. Amending the soil with organic matter such as compost or aged manure can improve its texture and fertility, supporting healthy growth. If the soil is heavy or poorly drained, consider incorporating sand or perlite to enhance drainage.


Regular pruning is essential for maintaining the compact, bushy growth of lemon thyme. Pruning not only helps control its size but also encourages the production of new growth and essential oils. After the first flush of spring flowers has faded, trim the entire plant back by one-third to promote bushiness and prolong its overall health and productivity.


Lemon thyme can be propagated from both seeds and cuttings. However, cuttings are the preferred method as they ensure the new plant retains the exact characteristics of the parent plant. Softwood cuttings taken from healthy, actively growing stems in late spring to early summer have the highest success rate. Place the cuttings in a well-draining rooting medium and provide bottom heat for faster root development.

Container Popularity

Lemon thyme is a popular choice for container gardening, thanks to its compact growth habit and delightful fragrance. Its versatility makes it an excellent candidate for both ornamental and culinary container gardens. When grown in containers, lemon thyme can adorn patios, balconies, and windowsills, providing easy access to its aromatic leaves for culinary and aromatic purposes.

Common Diseases

While lemon thyme is relatively resistant to diseases, it can occasionally face issues, particularly in conditions of excessive moisture and poor air circulation. Some common diseases that may affect lemon thyme include:

  • Powdery Mildew: A fungal disease characterized by a white, powdery growth on the leaves. It thrives in humid conditions and can be prevented by ensuring proper airflow and avoiding overhead watering.
  • Root Rot: This occurs in waterlogged soil and can lead to wilted, yellowing foliage. To prevent root rot, ensure that the soil is well-draining and avoid overwatering.
  • Botrytis Blight: Also known as gray mold, this fungal disease can cause damping off of seedlings and affect mature plants, particularly in wet, cool conditions.

Disease Diagnosis

Diagnosing diseases in lemon thyme involves closely inspecting the plant for symptoms such as leaf discoloration, wilting, or the presence of powdery growth. Additionally, assessing environmental conditions such as humidity, airflow, and watering practices can aid in identifying and addressing the underlying issues.

Common Pests

Being a member of the mint family, lemon thyme possesses natural insect-repelling properties due to its aromatic oils. However, certain pests may still pose a threat to this herb. Common pests that may affect lemon thyme include:

  • Aphids: Small, soft-bodied insects that suck sap from the plant, causing wilting and deformation of the leaves.
  • Spider Mites: These tiny pests can cause stippling and discoloration of the foliage, leading to weakened plant health.

Botanist’s Tips

To ensure the vitality and vigor of lemon thyme, consider the following botanist’s tips:
Harvesting: Regularly harvest the leaves to promote new growth and maintain the plant’s compact shape. The best time for harvesting is in the morning when the aromatic oils are at their peak concentration.
Companion Planting: Consider interplanting lemon thyme with other aromatic herbs such as rosemary, lavender, and sage to create a synergistic effect that deters pests and enhances the overall aromatic appeal of the garden.

Fun Facts

  • Lemon thyme’s citrusy fragrance and delicate flavor make it a popular choice for garnishing and infusing teas, adding a refreshing twist to the beverage.
  • The aromatic oils present in lemon thyme have been traditionally used in natural insect repellents, making it a valuable addition to outdoor spaces.

Links to External Resources

To further explore the world of lemon thyme and its myriad uses, consider the following external resources:
Thyme: Growing & Using
Lemon Thyme Recipes
Companion Planting with Thyme
Medicinal Uses of Thyme
How to Grow Thyme Indoors

In conclusion, the vibrant aroma and delicate flavor of lemon thyme make it a valuable addition to any garden. Whether used in culinary creations, medicinal remedies, or simply enjoyed for its aromatic qualities, lemon thyme is a versatile and rewarding herb to cultivate.

Through understanding its cultural requirements, propagation methods, and potential challenges, you can ensure that your lemon thyme thrives and graces your garden with its delightful presence. Embrace the allure of lemon thyme and discover the countless ways it can enrich your gardening experience and beyond.

Picture of Peter Taylors

Peter Taylors

Expert botanist who loves plants. His expertise spans taxonomy, plant ecology, and ethnobotany. An advocate for plant conservation, he mentors and educates future botanists, leaving a lasting impact on the field.