Marrubium vulgare thrives best under full sun for 6 to 8 hours a day. Ensuring these conditions can facilitate healthy growth and enhance its medicinal properties. Choose a sunny location in your garden to maximize light exposure.

To achieve ideal lighting conditions for Marrubium vulgare, consider planting it in an open area where it receives uninterrupted sunlight. You can also rotate the pot every few days if growing indoors, ensuring balanced light exposure on all sides.

When Marrubium vulgare receives optimal sunlight, it improves in vigor and produces flavorful, aromatic foliage. Proper lighting can also prevent straggly growth, fostering a more robust, bushy appearance and enhancing its natural resilience.

White horehound (Marrubium vulgare)

Also known as: Common horehound

White horehound (Marrubium vulgare) is a perennial herb often regarded as a weed. Known for flavoring candies and beverages, it features small white flowers that bloom from early summer to late fall. It thrives in full sun and is a magnet for bees.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of White horehound

Lifespan

Perennial

Plant Type

Herb

Plant Height

30 cm to 91 cm

Spread

50 cm

Leaf Color

Green

Flower Size

1-1.5 cm

Flower Color

White

Images of White horehound

Quickly Identify White horehound

Distinctive woolly appearance from grayish-white downy foliage.

Oval leaves with serrated edges, pungent scent when crushed.

Small tubular white flowers in dense whorls along upper stem.

Leaf texture: velvety due to white hairs, crinkled with scalloped edges.

Flowers emit mild, pleasant scent, bloom late spring to early summer.

Scientific Classification of White horehound

Phylum

Vascular plants

Class

Dicotyledons

Order

Lamiales

Family

Mint

Genus

Horehound

Species

White horehound

Planting and Growing of White horehound

Care Difficulty

Easy

Watering Schedule

Every 3 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 hours

Ideal Temperature

68-77℉

Soil Type

Potting Mix, Peat Mix

Soil pH

6.5-8

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

Once a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water White horehound?

When watering Marrubium vulgare, the goal is to moist the soil thoroughly without waterlogging. Pour 500ml of water slowly so it can penetrate deeply, but make sure the top inch of the soil dries out before the next watering session. This simulates the plant's natural conditions and encourages deep root growth.

What are the symptoms of an underwatered White horehound? ›

What should I do if my White horehound is not getting enough water? ›

What are the symptoms of an overwatered White horehound? ›

How to save an overwatered White horehound? ›

What Are the Sunlight Requirements for White horehound?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 6-8 hours daily

Marrubium vulgare flourishes under full sun, offering ideal conditions for robust growth. Adequate light boosts foliage density and aromatic oil production, enhancing its therapeutic uses.

Optimal Duration ›

Solution ›

Benefit ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for White horehound?

Ideal Temperature: 68 ~ 77℉

For optimal growth, Marrubium vulgare thrives best within a temperature range of 68 to 77°F. Providing this range ensures the plant's development and health is supported, as it aligns with its natural adaptability and physiological processes.

What Soil is Best for White horehound?

Soil type: Sandy soil, Loam, Calcareous soil

Soil PH: 6.5 ~ 8

Marrubium vulgare thrives in well-drained soil as it prevents waterlogging, which can lead to root rot. Good drainage ensures the plant gets the necessary amount of air and reduces the risk of diseases. This is crucial for maintaining healthy root systems. While Marrubium vulgare is hardy, providing a nutrient-rich soil can enhance its growth and vitality. Nutrients support lush foliage and robust stem development, helping the plant to better resist pests and environmental stressors. This plant prefers soils that are neutral to slightly alkaline. A soil pH in the 6.5 to 8.0 range helps in the optimum uptake of nutrients, promoting healthy growth and vibrant foliage, which is critical for its medicinal properties.

How to Fertilize White horehound?

Fertilizer type: Balanced

For Marrubium vulgare, a modest amount of balanced fertilizer is sufficient. Use about one-half to one teaspoon of liquid fertilizer diluted in water per plant. For solid fertilizers, apply approximately 2-3 tablespoons per plant at a time.

How to Prune White horehound?

Pruning Time: Spring, Summer, Autumn

Begin by cutting away any dead, damaged, or diseased stems back to the base of the plant. This helps stimulate new growth and maintain overall plant health. Prune Marrubium vulgare into a compact, bushy shape by trimming overgrown stems to just above a set of leaves or a node. This stimulates branching and creates a fuller appearance. During blooming season, deadhead spent flowers regularly to encourage repeat blooming and prolong the flowering period. This keeps the plant looking vibrant and fresh. More About Pruning Techniques→

How to Propagate White horehound plant?

Propagate Time: Spring, Late spring, Early summer

For seed propagation, prepare a well-draining soil mix by combining equal parts of potting soil, sand, and perlite. This mixture ensures adequate drainage and prevents waterlogging, which is crucial for preventing root rot and promoting healthy seedling development.

Distribute Marrubium vulgare seeds evenly on the surface of the seed tray. Lightly cover them with a thin layer of soil, ensuring good seed-to-soil contact. Mist the surface gently with water and place the tray under indirect sunlight.

For cutting propagation, select healthy stems with several leaves. Using sanitized pruning shears, cut a 4-6 inch section below a node. Remove the lower leaves and dip the cut end in rooting hormone before planting it in a pot filled with moist potting mix.

More About Propagating Techniques→

How to Repot White horehound plant?

Repotting frequency: Every 2-3 years

Monitor Marrubium vulgare for signals such as roots crowding the pot, slower growth, or soil that dries out too quickly. These indicators suggest it's time for repotting, setting the stage for healthier growth and better soil nutrients uptake.

Select a pot with good drainage holes and one size larger than the current pot. An appropriately sized pot provides space for roots to expand and prevents root rot by ensuring proper water drainage, crucial for healthy plant growth.

Opt for a well-draining sandy soil mix, which mimics Marrubium vulgare's native habitat. A blend of perlite, sand, and potting soil ensures proper drainage and aeration, preventing root rot and promoting strong, healthy growth.