Oxalis ‘Black Velvet’ (Xalis Series)

Description

Oxalis ‘Black Velvet’ is a striking clump-forming perennial with dramatic near-black, clover-like foliage and elegant white flowers that bloom from late spring into early autumn, making it an eye-catching addition to borders, containers, and rockeries.

PLANTING and AFTERCARE GUIDE

Best Planting Time

• Spring: Plant Oxalis ‘Black Velvet’ in spring when the soil is workable and beginning to warm, allowing roots to establish before active growth.
• Early Autumn: Early autumn is also an ideal planting time, giving the root system time to settle before dormancy.

Site Selection

• Sunlight: Oxalis ‘Black Velvet’ thrives in full sun or partial shade. A bright position encourages the richest foliage colour and abundant flowering.
• Soil: Free-draining soil is essential. Improve heavier soils with grit or organic matter to ensure excess moisture drains away efficiently.

Planting Instructions

1. Prepare the Hole: Dig a hole twice the width and the same depth as the root ball so the roots can spread easily.
2. Soil Preparation: Incorporate compost or well-rotted organic matter into the excavated soil to improve structure while maintaining good drainage.
3. Planting: Position Oxalis ‘Black Velvet’ with the top of the root ball level with the surrounding soil, then backfill gently and firm lightly.
4. Watering After Planting: Water thoroughly after planting to settle the soil and encourage healthy root establishment.

Watering Requirements

• Growing Season: Keep the soil evenly moist while the plant establishes, allowing the surface to dry slightly between watering.
• Established Plants: Once established, Oxalis ‘Black Velvet’ requires only occasional watering during prolonged dry spells and dislikes waterlogged conditions.

Feeding

• Spring: Apply a balanced fertiliser in early spring to encourage healthy foliage and continuous flowering.
• Mid-Season: A light supplementary feed can help Oxalis ‘Black Velvet’ maintain vigorous growth throughout the flowering season.

Pruning

• Deadheading: Remove faded flowers regularly to encourage more blooms and keep the plant looking tidy.
• Seasonal Care: Trim away damaged or tired foliage as needed to promote fresh, healthy growth.

Mulching

• Spring: Apply a light layer of organic mulch around the base to retain moisture, suppress weeds, and improve soil quality.
• Later in the Year: Replenish mulch as required, ensuring it does not sit directly against the crown.

Supporting the Plant

• Natural Habit: Oxalis ‘Black Velvet’ has a naturally compact, spreading habit and does not require staking or additional support.

Final Tips

Oxalis ‘Black Velvet’ is an easy-care perennial that offers exceptional contrast with its dark foliage and bright white flowers. With free-draining soil, a sunny or partially shaded position, and simple seasonal maintenance, Oxalis ‘Black Velvet’ will provide long-lasting colour and interest year after year.