Alnus glutinosa 'Imperialis' – The Elegant & Delicate Cut-Leaved Alder

Alnus glutinosa 'Imperialis', commonly known as the Cut-Leaved Alder, is a graceful and distinctive deciduous tree, valued for its deeply cut, fern-like foliage, upright growth, and resilience in various landscapes. With its light, airy canopy, this elegant cultivar adds a delicate yet striking presence to gardens, parklands, and wetland areas while supporting biodiversity.

Seasonal Beauty & Growth

• Spring: Bright green, deeply lobed leaves emerge, creating a fine-textured, delicate look.
• Summer: The lush, airy foliage casts dappled shade while maintaining an elegant, open structure.
• Autumn: Leaves turn a soft golden-yellow, providing seasonal interest before falling.
• Winter: The tree’s dark, smooth bark and retained cone-like seed clusters add winter texture and contrast.

Structure & Form

Alnus glutinosa 'Imperialis' forms a narrow, upright tree, reaching 10–15m in height, with a light, feathery canopy. Its uniquely cut foliage gives it a distinctive, ornamental appeal, setting it apart from other Alders. It is fast-growing, adaptable, and particularly suited to damp soils and waterside planting.

Perfect for Various Landscapes

• Architectural & Ornamental Gardens – Its delicate foliage adds refined elegance.
• Wetlands & Riverbanks – Thrives in moist conditions, helping with soil stabilization.
• Wildlife & Biodiversity Gardens – Provides habitat and food for pollinators and birds.
• Urban & Parkland Planting – Pollution-resistant and excellent for structured landscapes.

Growing Conditions & Care

• Position: Thrives in full sun to partial shade.
• Soil: Prefers moist, well-drained to waterlogged soils, but adapts to drier ground once established.
• Hardiness: Fully hardy and resistant to strong winds and flooding.
• Maintenance: Low-maintenance; occasional pruning to shape if needed.

Why Choose Alnus glutinosa 'Imperialis'?

With its ornamental, finely cut foliage, rapid growth, and adaptability, Alnus glutinosa 'Imperialis' is an ideal choice for those looking to add refinement, movement, and biodiversity support to their landscape.

Perfect Plant Combinations

• Other Ornamental Trees – Pair with Betula pendula (Silver Birch) or Sorbus aucuparia (Rowan) for light, airy contrast.
• Flowering Shrubs – Combine with Cornus alba (Dogwood) or Philadelphus (Mock Orange) for seasonal interest.
• Perennials – Underplant with Ferns, Astilbe, or Iris sibirica for a layered, textural effect.
• Grasses & Reeds – Complement with Miscanthus or Carex species for a naturalistic waterside setting.

Alnus glutinosa 'Imperialis' is a stunning, fast-growing, and versatile tree that enhances any garden, wetland, or parkland setting with its delicate yet robust presence.

Guide to Planting Field-Grown Root Balled Plants

Pros:

1. Established Roots: Typically stronger, established roots ensure better initial growth.
2. Immediate Impact: Larger plants provide instant structure and aesthetics.

Cons:

1. Heavy and Bulky: Can be difficult to transport and plant due to size and weight.
2. Seasonal Availability: Generally available only in the dormant season (autumn to early spring).

Preparation for Planting:

1. Unwrap Carefully: Remove any packaging material, but leave the burlap or wire basket on.
2. Keep plants moist: Plants should be kept moist until the time of planting.

Planting Process:

1. Dig a Hole: Make a hole twice the width of the root ball and the same depth.
2. Position Plant: Place the root ball in the hole, ensuring the top is level with the ground surface.
3. Do Not Remove Root Sack: Leave the burlap or wire basket around the root ball. It is bio degradable and will rot away naturally.
4. Backfill: Fill the hole with soil, firming gently around the roots to eliminate air pockets.
5. Water: Water deeply after planting to settle the soil and avoid wilting.

Possibility of Losses:

• Initial Shock: Some plants may suffer transplant shock, leading to potential losses.
• Mitigation: Proper care and consistent watering during the establishment phase can minimise this risk.

Main Causes of Failure:

1. Improper Planting Depth: Planting too deep or too shallow can stress the roots.
2. Poor Soil Conditions: Compacted or poorly drained soil can hinder root growth.
3. Insufficient Watering: Both under-watering and over-watering can lead to plant stress and failure. Strong wind can dry leafy pants.
4. Pest and Disease: Lack of protection and monitoring can result in damage from pests and diseases.

Tips for Success:

1. Stake Larger Plants: Support with stakes to prevent wind damage.
2. Mulch: Apply a layer of mulch around the base to retain moisture and regulate temperature.
3. Regular Monitoring: Check for signs of stress, pests, and disease, and address them promptly.

By following these guidelines and providing consistent aftercare, you can successfully plant and establish field-grown root balled plants in your garden.

Alnus glutinosa Imperialis 8/10cm Girth Root ball Grasslands Nursery

Does the height include the pot?

No, we measure from the top of the pot to the tip of the plant except for some of the instant planted screens, in this case it will be stated in the description

How long does delivery take?

Most orders are delivered in just a few days, Smaller items are often sent with Parcelforce on a next day service, Larger items should allow up to 10 days due to the size of the items they often have to be sent on our own transport.

Where will you leave my plants?

We will leave your order at the front of your property, Parcelforce may
leave your items in a safe place if you let us know, Pallet couriers
will require a flat hard surface to deliver to, no gravel or soil, a
driveway or parking spot would be best. Most importantly Deliveries by
pallet courier will require access for a large truck (bin lorry sized)
to get near the delivery point. Deliveries sent on our own transport may come in a small van or larger truck.