Blechnum penna-marina (Alpine Water Fern)

How to grow Blechnum penna-marina (Alpine Water Fern) in NZ

Blechnum penna-marina (Alpine Water Fern) grows best in full shade to part shade and prefers cool, moist, and well drained soil. Plant in a sheltered position away from strong wind and harsh sun. Keep the soil consistently damp, especially during establishment. Mulch generously to retain moisture and enrich the soil. This fern is well suited to NZ alpine and woodland style gardens where it thrives in naturally cool conditions.

Blechnum penna-marina (Alpine Water Fern) care tips

Blechnum penna-marina (Alpine Water Fern) is easy to care for when given regular moisture and shade. Water during dry spells to prevent stress and avoid allowing the soil to dry out completely. Apply mulch each year to support soil health and moisture retention. Remove older fronds to maintain a tidy appearance. In very cold areas, young plants may benefit from light frost protection until established.

Blechnum penna-marina (Alpine Water Fern) size spacing and growth rate

Blechnum penna-marina (Alpine Water Fern) typically grows ten to fifteen centimetres tall and spreads thirty to sixty centimetres wide. Space plants thirty centimetres apart for full ground coverage. Growth is slow to moderate, forming a dense mat over time. Once established, it becomes a long lived, reliable fern that provides soft, evergreen texture to shaded and cool garden areas.

Landscaping uses for Blechnum penna-marina (Alpine Water Fern)

Blechnum penna-marina (Alpine Water Fern) is ideal for native gardens, shaded banks, rockeries, and woodland plantings. Its compact form makes it perfect for edging pathways, filling gaps between rocks, or adding softness beneath shrubs. It pairs beautifully with hostas, carex, heucheras, and other moisture loving plants. This fern brings a natural, calming presence and integrates seamlessly into NZ themed and alpine inspired garden designs.

Why buy Blechnum penna-marina (Alpine Water Fern) from The Plant Company?

Blechnum penna-marina (Alpine Water Fern) from The Plant Company is grown with care to ensure healthy roots, strong fronds, and dependable performance in NZ gardens. Each plant is selected for vigour and long term resilience. The Plant Company is NZs most trusted plant nursery and offers expert support to help your garden thrive. Choosing this variety guarantees premium quality stock that enhances shaded areas with lasting botanical beauty.