Banana Boat Sedge

Carex siderosticha 'Banana Boat'

Family: Sedge

Type: Ornamental grass

Other Common Name: Broad-Leaved Sedge

Carex siderosticha ‘Banana Boat’ is a vibrant, variegated sedge perfect for adding texture and color to gardens. Its broad leaves display a unique blend of green and yellow hues. This hardy perennial thrives in partial to full shade, making it ideal for those tricky low-light areas. It grows in dense, spreading clumps, reaching up to 12 inches in height.

‘Banana Boat’ is low-maintenance and pest-resistant, ideal for both novice and experienced gardeners. Its striking foliage offers year-round interest, especially in shaded garden spots.

Needs & Preferences

Hardiness Zone: 4b-5a

Pet Friendly: Yes

Moisture Preference: Average to wet

Sun Needs: Partial shade to shade


Growth Rate: Medium

Average Height (feet): 1

Average Spread (feet): 1.5

Average Life Span (years): 10

Form: Arching


Foliage Color: Yellow

Foliage Shape: Grassy

Landscaping Your Yard With Carex siderosticha ‘Banana Boat’

Integrating ‘Banana Boat’ into your landscape creates a lush, textured look. Its colorful foliage contrasts beautifully with darker green plants. It works well as ground cover or in borders, adding structure and vibrancy. Plant it in groups for a striking visual impact or as a solitary accent for subtle charm.

This sedge is also suitable for container gardening, making it versatile for patios and balconies. Its compact growth habit ensures it doesn’t overpower smaller spaces.


Suitable Garden Styles

Woodland Garden

In a woodland garden, 'Banana Boat' complements the dappled shade of trees and shrubs. Its bright foliage contrasts with the darker greens typically found in such settings, creating a serene, naturalistic ambiance.

Modern Minimalist

For a modern minimalist garden, this sedge offers a splash of color without overwhelming simplicity. Its structured form and striking variegation fit well with sleek, contemporary designs.


In Japanese-inspired gardens, 'Banana Boat' can mimic the flow of water with its cascading foliage. It harmonizes with elements like stones and water features, enhancing the tranquil aesthetic.

Carex siderosticha ‘Banana Boat’ Landscaping Ideas

Create a tranquil corner by pairing ‘Banana Boat’ with ferns and hostas. The combination of textures and colors will enhance any shady spot. Edge pathways or garden beds with this sedge for a neat, yet eye-catching border. Its dense growth habit creates a natural, flowing edge.

Utilize ‘Banana Boat’ in rain gardens or damp areas. Its tolerance for moist soils makes it a practical choice for such environments. The vibrant foliage stands out, especially in areas that can often look soggy and unattractive.

Seasons with Carex siderosticha 'Banana Boat'


During spring, 'Banana Boat' begins to flourish, its leaves brightening with the increasing sunlight. The vibrant yellow streaks in its foliage become more pronounced, creating a striking contrast against the fresh greens of the season.


In the summer, this sedge maintains its lush appearance despite the heat. Its leaves may deepen in color, providing a rich, textured backdrop for summer blooms. This resilience makes it a steadfast addition to the garden during the warmer months.


As fall approaches, 'Banana Boat' adds warmth to the garden with its yellow hues becoming more prominent. While many plants begin to fade, it continues to stand out, offering a visual anchor in the increasingly barren landscape.


Even in winter, Carex siderosticha 'Banana Boat' retains its structure and color, albeit more subdued. It provides interest in a dormant garden, with its foliage sometimes taking on a more muted, golden tone, standing out against the starkness of snow and bare branches.

Planting Tips

Where to Plant

Carex siderosticha ‘Banana Boat’ thrives in partially shaded to fully shaded areas. Ideal locations include under trees, alongside north-facing walls, or in any spot that receives dappled sunlight.


This plant prefers low to moderate light conditions. While it can tolerate some morning sun, excessive direct sunlight may scorch its leaves. Shaded or partially shaded areas are perfect for maintaining its vibrant color.


'Banana Boat' does best in moist, well-draining soil. It can adapt to a range of soil types but prefers a slightly acidic to neutral pH. Good soil aeration is key to preventing root rot.


When planting, space each 'Banana Boat' about 18 to 24 inches apart. This spacing allows each plant enough room to grow and spread, creating a lush, full appearance in the garden.

When to Plant

The best time to plant ‘Banana Boat’ is in the spring or early fall. Planting during these cooler months allows the sedge to establish its root system before extreme weather conditions.

How to Plant

Dig a hole as deep as the root ball and twice as wide. Place the plant in the hole and backfill with soil, ensuring the crown is level with the ground. Water thoroughly after planting to settle the soil.

Plant Care Tips


Regular watering is essential, especially in dry conditions. Keep the soil consistently moist but not waterlogged. Overwatering can lead to root issues.


Fertilize lightly in the spring with a balanced, slow-release fertilizer. Over-fertilizing can harm the plant, so moderation is key.


Prune back dead or damaged foliage in early spring to encourage new growth. Regular pruning isn’t necessary but can help maintain its shape.

By Season


Spring Care

In spring, remove any winter-damaged foliage and apply a light layer of compost or slow-release fertilizer to encourage lush growth.

Summer Care

During summer, ensure consistent moisture, especially in hotter, drier periods. Mulching helps retain soil moisture and keeps the roots cool.

Fall Care

In fall, reduce watering as the plant begins to go dormant. This is also a good time to divide the plant if it has become too large.

Winter Care

Winter care is minimal. 'Banana Boat' is generally winter-hardy but may benefit from a light mulch layer in colder regions to protect the roots.


Is 'Banana Boat' Deer Resistant?

Yes, Carex siderosticha ‘Banana Boat’ is generally deer-resistant. Its foliage isn’t a preferred food source for deer, making it a good choice in areas with high deer activity.

Can It Grow in Full Sun?

While ‘Banana Boat’ can tolerate some sun, prolonged exposure to full sunlight can scorch its leaves. It’s best suited for shaded to partially shaded locations.

How Fast Does It Spread?

This plant grows at a moderate rate, forming clumps that gradually spread outward. It’s not considered invasive but will fill in an area over time, making it great for ground cover.

Products That Feature This Plant

Marsh Madness

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