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Thymus × citriodorus
Lemon Thyme
Thymus × citriodorus
Thymus × citriodorus, commonly known as Lemon Thyme, is a delightful evergreen subshrub prized for its fragrant foliage and culinary versatility. It is a hybrid of Thymus pulegioides and Thymus vulgaris. This low-growing plant forms dense mats or mounds, typically reaching 6-12 inches (15-30 cm) in height and spreading up to 18 inches (45 cm). Its small, oval, aromatic leaves release a distinct lemony scent when crushed, making it a popular choice for herb gardens, rockeries, and as a groundcover. In late spring to early summer, it produces small, pale pink to lilac flowers that are highly attractive to bees and other pollinators.
CategoryDetails
Plant TypePerennial plant
Culinary UsageEdible plant
Medicinal UsageMedicinal Usage
Duration to maturity3 months to harvest
Estimated Plant Lifespan5 years lifespan
Sun Requirements6+ hours direct sunlight (Full Sun)
Pollination

Method: animal

Notes: Lemon Thyme flowers are highly attractive to various pollinators, especially bees, which are essential for its pollination. Encouraging bee activity can lead to better seed set and overall garden health.

Watering Requirements

Method: Top water

Frequency: When the top 1-2 inches (2.5-5 cm) of soil are dry to the touch.

Notes: Lemon Thyme is drought-tolerant once established and prefers dry conditions. Overwatering is a common cause of root rot. Ensure excellent drainage and allow the soil to dry out between waterings, especially during cooler months.

Humidity Requirements

Level: low

Care InstructionsPrune Lemon Thyme lightly after flowering to maintain a tidy shape and encourage bushy new growth. Avoid heavy pruning into old, woody stems. Ensure good air circulation around the plants to prevent fungal issues, especially in humid climates. Regular harvesting of leaves for culinary use also helps maintain plant vigor and shape.
Temperature Range

Min: -15°C

Max: 35°C

Lavandula angustifolia
Common Lavender
Lavandula angustifolia
Both Lemon Thyme and Lavender thrive in full sun and well-drained soil, making them ideal companions. Their contrasting textures and complementary purple blooms create an aesthetically pleasing combination, and both are drought-tolerant once established. Lavender also attracts beneficial pollinators.
Salvia rosmarinus
Rosemary
Salvia rosmarinus
Rosemary shares similar sun and well-draining soil requirements with Lemon Thyme. Planting them together creates a cohesive Mediterranean-style garden bed, and their distinct aromatic profiles complement each other both in the garden and potentially in culinary applications.
Origanum vulgare
Origanum vulgare
Like Lemon Thyme, Oregano is a Mediterranean herb that prefers full sun and dry to medium, well-drained soil. They have similar growth habits and care needs, making them natural partners in an herb garden. Both attract beneficial insects and are drought-tolerant.
Equisetum hyemale
rough horsetail
Equisetum hyemale

Horsetail prefers very moist to wet soil and can be very aggressive in spreading. It would quickly outcompete Lemon Thyme, which needs excellent drainage and can rot in overly wet conditions. Their environmental needs are diametrically opposed.

Thymus pulegioides
Large Thyme
Thymus pulegioides
Thymus vulgaris
Thymus vulgaris
Spider Mites

Tiny arachnids that feed on plant sap, causing stippling (tiny yellow or white dots) on leaves, yellowing, and eventually leaf drop. Fine webbing may be visible on the undersides of leaves or between stems if infestation is severe.

Aphids

Small, soft-bodied insects that cluster on new growth and leaf undersides, sucking plant sap. Infested plants may show distorted or stunted new growth, sticky honeydew secretion, and sooty mold growth.

Root Rot

A fungal disease caused by excessive soil moisture and poor drainage. Symptoms include wilting, yellowing leaves, stunted growth, and a soft, mushy crown and roots, often leading to plant death.

Powdery Mildew

A fungal disease that appears as white, powdery patches on leaves and stems. It can inhibit photosynthesis, leading to yellowing, distortion, and reduced vigor, especially in humid conditions with poor air circulation.

Steps:

    • Choose healthy, non-flowering stems about 3-4 inches (7-10 cm) long from the tips of the plant.
    • Remove the leaves from the bottom 1-2 inches (2.5-5 cm) of the stem.
    • Dip the cut end into rooting hormone powder (optional, but can improve success rate).
    • Insert the cuttings into a pot filled with a well-draining potting mix (e.g., sand and perlite or a seed starting mix).
    • Water thoroughly and place in a warm location with bright, indirect light.
    • Keep the soil consistently moist but not waterlogged until roots form, typically in 3-6 weeks. You can cover the pot with a plastic bag to maintain humidity, but ensure good air circulation to prevent mold.
    • In spring or early autumn, carefully dig up a mature Lemon Thyme plant.
    • Gently divide the root ball into smaller sections, ensuring each section has a healthy portion of roots and stems.
    • Replant the divisions in well-drained soil, spacing them appropriately.
    • Water thoroughly after replanting to help establish the new plants.

Compost

Improves soil structure, fertility, and drainage, promoting healthy root development and overall plant vigor for Lemon Thyme.

Sand or Perlite

Used as a soil amendment to enhance drainage, crucial for preventing root rot in Lemon Thyme, which prefers well-drained conditions.

Neem Oil Spray

A natural insecticide and fungicide that can be used to control spider mites, aphids, and some fungal issues like powdery mildew on Lemon Thyme.

Insecticidal Soap

An effective and low-toxicity option for controlling soft-bodied pests like aphids on Lemon Thyme by disrupting their cell membranes.

Gravel Mulch

Applied around the base of the plant, it helps suppress weeds, reflects heat, and improves air circulation around the plant crown, which is beneficial for thyme.