Water Spearmint (Mentha cervina)

Water Spearmint | Mentha cervina

Compact Aromatic Pond Plant with Lavender Flowers

The Perfect Alternative to Water Mint for Smaller Garden Ponds

Water Spearmint (Mentha cervina) is a beautiful and highly versatile marginal pond plant that offers all the benefits of traditional Water Mint but in a much more manageable form. With its fine, needle-like aromatic foliage and elegant spikes of lavender flowers, Water Spearmint is an excellent choice for smaller garden ponds, wildlife ponds, bog gardens, and container water features where space is limited.

Unlike the vigorous native Water Mint (Mentha aquatica), which can quickly spread and dominate a pond margin, Water Spearmint remains compact and well-behaved. This makes it particularly popular with pond owners who want the attractive appearance and pollinator benefits of a mint species without the need for constant maintenance and control.

From midsummer through to autumn, Water Spearmint produces masses of delicate lilac to lavender flower spikes that stand proudly above its fragrant foliage. These nectar-rich blooms attract bees, butterflies, hoverflies, and many other beneficial pollinating insects, helping to support biodiversity around your pond. The dense foliage also provides shelter for frogs, newts, insects, and other wildlife that depend on pond margins for protection.

Its slender, bright green leaves release a pleasant mint fragrance when touched, adding another sensory dimension to your pond planting scheme. The foliage creates a softer, more delicate appearance than many traditional marginal plants, making it ideal for formal ponds, contemporary water gardens, cottage garden ponds, and wildlife-focused landscapes.

Water Spearmint thrives in shallow water and permanently moist soils. It performs well on pond shelves, around bog gardens, and along damp borders where it can enjoy consistent moisture throughout the growing season. Once established, it is extremely reliable, hardy, and easy to maintain.

If you are looking for a flowering marginal plant that combines fragrance, wildlife value, compact growth, and long-lasting colour, Water Spearmint is one of the best pond plants available. Its restrained growth habit, beautiful flowers, and attractive foliage make it a valuable addition to almost any pond planting scheme.

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Key Benefits

• Compact alternative to vigorous Water Mint
• Fragrant foliage with a pleasant mint aroma
• Beautiful lavender flower spikes throughout summer
• Excellent pollinator plant for bees and butterflies
• Ideal for smaller garden ponds
• Suitable for pond margins and bog gardens
• Provides shelter for amphibians and beneficial insects
• Long flowering period from summer into autumn
• Easy to grow and low maintenance
• Fully hardy throughout the UK

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Reasons to Buy

• Perfect for small ponds where space is limited
• Offers the beauty of Water Mint without aggressive spreading
• Produces masses of pollinator-friendly flowers
• Adds fragrance, texture, and colour to pond edges
• Easy to establish and maintain
• Suitable for wildlife ponds and ornamental water gardens
• Excellent choice for beginner pond keepers

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Care Instructions

• Water Spearmint is very easy to grow and requires minimal maintenance once established. Position the plant in shallow water or consistently moist soil, ideally with the top of the basket sitting between 0cm and 5cm below the water surface.
• For the best flowering display, plant in full sun, although partial shade is also tolerated. The plant benefits from regular moisture and should never be allowed to dry out completely.
• Trim spent flower stems and remove any damaged foliage in late autumn or early spring to keep the plant looking tidy. Unlike common Water Mint, Water Spearmint rarely becomes invasive and generally requires very little control.
• This variety is rarely troubled by pests or diseases and is an excellent low-maintenance choice for pond owners.

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Flowering Period

July to October

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Size and Growing Conditions

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Dispatching Your Pond Plants

Your Water Spearmint will be carefully packed to protect the foliage and roots during transit.

Orders received by 11am Monday to Wednesday are normally dispatched on the following working day using a next working day courier service. During busy periods, dispatch may occasionally take an extra day.

To avoid plants being held in depots over a weekend, we do not usually dispatch on Fridays. Highlands and Islands orders using a two day service are not normally dispatched on Thursdays.

Available basket sizes:

• Pack of 3 × 9cm Pots
• 1 Litre Basket – usually 11 × 11 × 11cm square; some varieties may be supplied in a 14cm diameter × 10cm round basket
• Pack of 3 × 1 Litre Baskets – each usually 11 × 11 × 11cm square

Planting depth is measured from the top of the aquatic basket to the water surface.

Plants supplied in 9cm pots require potting into suitable aquatic baskets before being placed in the pond.

Finofil baskets are manufactured in the UK from 100% recycled plastic and are fully recyclable. Their fine dual-mesh construction helps retain aquatic soil while allowing water and nutrients to reach the roots. Basket shape may vary slightly depending on the plant and supplier availability.

Explore more marginal pond plants or browse our complete pond plants range.