Buy Acorus calamus (Sweet Flag) online UK
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Acorus calamus (Sweet Flag)

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Acorus calamus (Sweet Flag)

Dark green iris-like foliage with a small green horn-shaped bloom. It grows from a rhizome which runs across the ground out of which the leaves rise up. It has been used in fragrances and medicinal cures since Egyptian times.

Little maintenance is required. Trim just above the water surface after foliage has died back in Autumn to tidy leaving a little material to protect new shoots.

Plant in full sun to partial shade between 1cm and 15cm deep.

  • Flowering period: June & July
  • Mature height: 60cm to 90cm
  • Growth rate: medium

Frequently Asked Questions

When is the best time to buy pond plants in the UK?

Spring is the ideal time to add plants to your pond, as warmer temperatures encourage strong growth. We suggest purchasing between mid-February and March, to give your pond plants plenty of time to establish roots and adapt to their new environment before summer.

Which pond plants help oxygenate water?

Plants like hornwort and water crowfoot are excellent for boosting oxygen levels in ponds. They absorb carbon dioxide and release oxygen, helping to keep the water clean and healthy for fish and other wildlife.

How do I choose the right pond plants for my pond size?

For small ponds, select compact plants like dwarf water lilies and small irises to keep the space well-balanced without overcrowding. Large ponds benefit from a mix of floating plants like water hyacinth, which covers a broad surface, and larger water lilies that provide shade.

How can I attract more wildlife to my pond with plants?

Planting marginal plants like marsh marigold provides shelter for frogs and insects, while oxygenating plants like hornwort improve water quality, creating a healthier habitat for aquatic life. Choosing a mix of plants that bloom at different times of the year ensures your pond remains a thriving, wildlife-friendly environment throughout the seasons.

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