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Hypericum perforatum (Perforate St John's-wort)

Bog Plant
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Original price £0.00 - Original price £0.00
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£2.60
£2.60 - £55.58
Current price £2.60
Package Quantity: 1
Size: 7cm Bareroot
Size Information

You can choose plants in various pot sizes. Non-potted plants arrive bare root for you to pot in the specified pot size.

Seasonal Information

Depending on the time of year, pond plants may be supplied fully-leaved, with flowers, or with foliage trimmed back.

Delivery Information

This plant is grown in the UK and sent directly from our tried, tested and trusted plant partner. Delivery price calculated at checkout.

Description of Hypericum perforatum (Perforate St John's-wort)

Hypericum perforatum is perforate St John's-wort. You’ll also see it called common St John’s-wort. It’s not a true bog plant, but it can work on the drier edge of a bog garden where soil stays lightly moist rather than wet.

Appearance

It forms upright stems with narrow leaves. In summer it produces yellow flowers with lots of stamens. Height is often 40 to 80cm, depending on the site. It can self-seed in open ground.

Care Guide

It prefers sun and soil that drains. If you sit it in constant saturation, it often looks unhappy and short-lived.

  • Sun: Full sun is best.
  • Soil: Moist but free-draining soil. Avoid stagnant, waterlogged compost.
  • Water: Water in dry spells while it establishes, then it is fairly tough.
  • Cut back: Trim back in spring to keep it compact.
  • Control: Deadhead or thin seedlings if it self-seeds too freely.

If you want a neater plant, cut it back after the main flowering flush. It often responds with fresh growth.

Suitability for Bog Garden

This suits bog gardens only as a transition plant on the upper edge. Use it where water drains away, such as the top lip of a raised bog or the outer rim of a liner bog.

It is better in nearby damp meadow planting than in the wet centre.

FAQs

What is the difference between bog plants and marginal pond plants?

Bog plants prefer consistently damp or wet soil but generally do not want to remain submerged in standing water. Marginal pond plants are adapted to grow at the pond edge with their roots or crowns in shallow water. If an area stays flooded for long periods, marginal plants are usually more appropriate.

Do bog plants need to be planted in water?

No. Bog plants need reliably moist or wet soil rather than permanent standing water. They are suitable for bog gardens, damp borders and moist areas around ponds, but most should not be planted underwater.

How do I make a bog garden for bog plants?

Choose an area where the soil can be kept consistently moist and improve it with plenty of organic matter. A purpose-built bog garden can also be created by using a liner that retains moisture while still allowing some drainage, then filling the area with suitable soil before planting.

Can bog plants grow in shade?

Some can. Many bog plants grow best in sun, but there are species that tolerate partial shade. The important factor is maintaining the moist soil conditions the particular plant requires, so check the individual plant's light requirements before choosing its position.

What are the best bog plants for wildlife?

Flowering bog plants can provide nectar and pollen for insects, while dense foliage creates shelter around a pond or damp garden. A mixture of flowering periods, heights and foliage types generally provides more varied habitat than relying on a single species.

What are the best pond plants for a wildlife pond?

The best wildlife pond plants provide a mixture of underwater cover, surface shade, flowering habitat and places for aquatic insects to emerge. A balanced pond can include oxygenating plants, marginal plants and floating-leaved plants such as water lilies. Native species are particularly useful for supporting UK pond wildlife.