Creating a beautiful shade garden often starts with a great foundation plant. Japanese forest grass, with its cascading habit, pairs beautifully with other shade-loving plants to create textured, layered garden beds. If you are looking for the best japanese forest grass companion plants, you have come to the right place. This guide will provide you with practical ideas and clear steps to design stunning combinations.
Japanese Forest Grass Companion Plants
Choosing the right companions for Japanese forest grass (*Hakonechloa macra*) is about more than just looks. It is about matching cultural needs to ensure all plants thrive. The goal is to create a harmonious community where each plant’s form, color, and texture complements the others. This section covers the core principles for successful pairings.
Understanding Japanese Forest Grass
Before choosing companions, you need to understand the star of the show. Japanese forest grass is a deciduous, perennial grass native to Japan. It forms elegant, flowing mounds. Its requirements will dictate what grows well beside it.
- Light: Prefers partial to full shade. It can tolerate morning sun but will scorch in hot afternoon sunlight.
- Soil: Thrives in consistently moist, well-drained soil rich in organic matter. It does not tolerate drought or soggy, waterlogged conditions.
- Habit: Grows in graceful, arching clumps 12 to 18 inches tall and wide, with a cascading effect.
- Color Varieties: The classic green type (‘Aureola’ is a popular gold-striped cultivar, while ‘All Gold’ is a bright chartreuse).
Knowing this, your companion plants must also enjoy shade, moisture, and good drainage. This shared preference is the key to a low-maintenance, healthy garden bed.
Design Principles For Companion Planting
Good garden design follows a few simple rules. When applied to Japanese forest grass, these principles help you create a professional-looking display.
Contrast In Form And Texture
The fine, flowing texture of the grass is its greatest asset. Pair it with plants that have bold, broad leaves or delicate, fern-like foliage to create visual interest. This contrast makes each plant stand out.
Harmonizing Color Schemes
Consider the color of your grass cultivar. The gold varieties like ‘Aureola’ pair wonderfully with blue, purple, and silver tones. The green types act as a neutral backdrop for brighter flowers and foliage.
Layering For Depth
Use plants of different heights to create depth. Place taller plants behind or emerging through the grass, and use low-growing ground covers at its feet. This layered approach fills the space naturally.
Seasonal Interest
Japanese forest grass has a long season, from spring green to golden fall color. Choose companions that offer interest at different times, like spring bulbs, summer blooms, and autumn foliage, for a garden that looks good year-round.
Top Shade-Loving Perennial Companions
Perennials are the backbone of a shade garden. They return year after year, building a stable plant community. These are some of the most reliable and attractive partners for Japanese forest grass.
- Hostas: A classic pairing. The bold, sculptural leaves of hostas provide perfect textural contrast against the fine grass. Choose blue-hostas for gold grasses or variegated types for green grasses.
- Ferns: They share the same woodland aesthetic. The upright shuttlecock form of Ostrich ferns or the delicate fronds of Japanese painted ferns look exquisite next to the flowing grass.
- Astilbe: Their feathery plumes of pink, red, or white flowers add a soft, vertical element above the grass in summer. The fern-like foliage also complements the grass’s texture.
- Heuchera (Coral Bells): Valued for their colorful, ruffled foliage in shades of purple, silver, amber, and lime. They create a stunning color contrast at the base of the grass clumps.
- Brunnera (Siberian Bugloss): Known for its heart-shaped, often silver-spotted leaves and sprays of tiny blue forget-me-not flowers in spring. It’s a wonderful early-season companion.
- Hellebores (Lenten Rose): Provide very early spring blooms and evergreen foliage. Their nodding flowers appear just as the grass is beginning to emerge.
Excellent Foliage Partners
Sometimes, the most lasting impact comes from foliage alone. These plants offer exceptional leaf color, shape, or texture that pairs seamlessly with Japanese forest grass.
- Pulmonaria (Lungwort): Offers silver-spotted leaves and early spring flowers. The rough-textured leaves are a great foil for the grass’s smooth flow.
- Lamium (Dead Nettle): A fast-growing ground cover with silver-marked leaves and small flowers. It can fill in around the base of grass clumps nicely.
- Carex (Sedge): Other shade-tolerant sedges can be used to echo or contrast the grass’s form. *Carex* ‘Ice Dance’ with its white-edged leaves is a good choice.
- Rodgersia: For larger spaces, the huge, palmate leaves of Rodgersia create a dramatic, tropical contrast that is unforgettable.
Incorporating Bulbs And Seasonal Accents
Bulbs provide pops of seasonal color before the grass and its perennial companions reach their full size. They are the perfect way to add early excitement to the planting.
- Spring Bulbs: Plant small bulbs like crocus, scilla, and chionodoxa around the grass. They will bloom as the grass starts to green up. Larger bulbs like daffodils and tulips can work if their dying foliage is masked by the expanding grass.
- Summer Bulbs: Consider shade-tolerant options like hardy cyclamen (*Cyclamen hederifolium*) for late summer and fall bloom. Their marbled leaves are attractive too.
- Annuals: For a temporary color boost, use shade-loving annuals like impatiens, begonias, or coleus. Tuck them in gaps for a single season’s interest without disturbing the perennial layout.
Step-By-Step Planting Guide
Now that you have chosen your plants, here is how to put them together successfully. Proper planting ensures they establish quickly and grow well.
- Prepare the Soil: This is the most important step. Amend the planting area with 3-4 inches of compost or well-rotted leaf mold. Work it into the soil to improve moisture retention and drainage.
- Arrange Your Plants: While they are still in their pots, arrange them on the soil surface. Place the Japanese forest grass clumps first, then position companions around them. Follow the layering principle: tall in back, medium in middle, short in front.
- Planting: Dig holes twice as wide as the root ball but no deeper. Gently tease out the roots of pot-bound plants. Place each plant in its hole, ensuring the crown is level with the soil surface. Backfill with the amended soil.
- Watering and Mulching: Water thoroughly after planting. Apply a 2-inch layer of shredded bark or leaf mulch around the plants. This helps retain soil moisture and suppress weeds. Keep the mulch away from the plant crowns to prevent rot.
- Ongoing Care: Water regularly during the first growing season and during dry spells. Cut back the Japanese forest grass to a few inches in late winter before new growth emerges. Divide overcrowded clumps in early spring every few years.
Common Mistakes To Avoid
Even with the best intentions, a few errors can undermine your design. Avoid these common pitfalls for a healthier, more beautiful garden.
- Planting in Full Sun: This will cause the grass to scorch and turn brown. It’s leaves will lose their vibrant color. Always choose a shaded location.
- Poor Soil Preparation: Skipping the compost amendment leads to soil that dries out to quickly or drains poorly. Both will stress the plants.
- Overcrowding: Give plants room to reach their mature size. Crowding leads to competition for water and nutrients and increases disease risk due to poor air circulation.
- Ignoring Water Needs: Do not pair Japanese forest grass with drought-tolerant plants like sedum or lavender. The grass’s need for consistent moisture will not be met, and its companions may rot.
- Forgetting About Roots: Avoid planting aggressive spreaders or plants with dense, invasive root systems right next to the grass. They can choke out the shallow roots.
Design Themes And Inspiration
To spark your creativity, consider these themed planting ideas that center around Japanese forest grass.
A Japanese-Inspired Garden
Embrace the grass’s origins. Pair it with Japanese maples, moss, azaleas, and simple stone elements. The focus is on serenity, form, and seasonal change.
A Woodland Wonderland
Create a naturalistic scene. Combine the grass with native ferns, wild ginger (*Asarum*), trillium, and shade-loving asters. It will look like a peaceful forest floor.
A Modern Contrast Garden
Use the grass in a contemporary setting. Plant it in sleek containers or geometric beds alongside bold-leaved plants like black mondo grass (*Ophiopogon planiscapus ‘Nigrescens’*) and architectural hellebores.
A Color-Splash Border
Use the gold cultivars as a bright base. Add the purple foliage of heuchera, blue flowers of brunnera, and pink blooms of astilbe for a vibrant, cheerful display.
Frequently Asked Questions
Here are answers to some common questions about companion planting with Japanese forest grass.
What grows well with Hakone grass?
Plants that grow well with Hakone grass (another name for Japanese forest grass) are those sharing its love for shade and moist soil. Excellent choices include hostas, ferns, astilbe, heuchera, hellebores, and pulmonaria. Avoid sun-loving, drought-tolerant plants.
Can you plant Japanese forest grass in full sun?
It is not recommended. Japanese forest grass prefers partial to full shade. In full sun, especially in hotter climates, its leaves will often scorch, fade, or curl. Morning sun with afternoon shade is the ideal situation for most cultivars.
How do you keep Japanese forest grass looking good?
Keep it in shade, ensure the soil is consistently moist but well-drained, and apply mulch. Cut it back in late winter. Divide the clumps every 3-4 years in spring to maintain vigor and prevent a dead center from forming.
What is the best fertilizer for Japanese forest grass?
A light application of a balanced, slow-release fertilizer in early spring is sufficient. Alternatively, top-dress with compost annually. To much fertilizer can cause weak, floppy growth and reduce the intensity of leaf color in variegated types.
Is Japanese forest grass invasive?
No, it is a well-behaved clump-forming grass. It spreads slowly by rhizomes but is not considered invasive. It will gradually increase in size, which makes it easy to control and divide for new plants elsewhere in your garden.
Choosing the right japanese forest grass companion plants transforms a simple planting into a captivating garden scene. By focusing on shared growing conditions and playing with contrasts in texture, form, and color, you can create a low-maintenance, shade garden that provides interest across multiple seasons. Start with one or two companion pairs and expand your design as you gain confidence. The graceful beauty of Japanese forest grass makes it worth the effort, and with the right partners, your garden will become a tranquil retreat.