Delphinium (Pacific Giant Series) ‘Percival’

Description

Delphinium (Pacific Giant Series) ‘Percival’ is a striking perennial known for its tall spikes of semi-double white flowers with dark bee markings, making it an excellent addition to any garden. This plant can reach a height of 1.8m and spreads up to 75cm, thriving in full sun and fertile, moist, well-drained soil. Follow this guide to ensure your Delphinium (Pacific Giant Series) ‘Percival’ flourishes throughout the growing season.

PLANTING and AFTECARE GUIDE

Best Planting Time

• Spring: The best time to plant Delphinium ‘Percival’ is in early spring when the soil begins to warm. This allows the roots to establish before the plant begins to bloom, ensuring a strong and healthy start.
  • Autumn: Alternatively, planting in early autumn gives the plant a chance to settle in before the colder months, leading to better growth and stronger blooms the following year.

Site Selection

• Sunlight: Delphinium thrives in full sun, requiring at least 6 hours of direct sunlight per day for optimal flower production. Choose a spot that is sunny and sheltered from strong winds to support its tall, delicate spikes.
  • Soil: Ensure that the soil is fertile, moist, and well-drained. Delphinium (Pacific Giant Series) ‘Percival’ does not tolerate waterlogged conditions, so well-draining soil is essential to prevent root rot. Enhance soil quality by incorporating compost or organic matter for better drainage and fertility.

Planting Instructions

1. Prepare the Hole: Dig a hole that is twice the width and the same depth as the root ball. This ensures that the roots have plenty of room to spread and grow.
2. Soil Preparation: Mix organic matter such as compost into the soil to enrich it, providing the necessary nutrients for healthy growth and vibrant blooms.
3. Planting: Place the Delphinium plant into the hole, ensuring the top of the root ball is level with the surrounding soil. Gently backfill the hole, firming the soil around the plant to remove any air pockets.
4. Watering After Planting: Water thoroughly after planting to settle the soil and encourage root establishment. Ensure that the area drains well to avoid waterlogged conditions.

Watering Requirements

• Growing Season: Delphinium (Pacific Giant Series) ‘Percival’ prefers consistently moist soil, especially during its growing season. Water regularly, ensuring the soil does not dry out. However, avoid overwatering, as this can lead to root rot.
  • Dormant Season: Reduce watering significantly once the plant enters dormancy after blooming. Water only when the soil becomes excessively dry.

Feeding

• Spring: Apply a balanced fertiliser in early spring to help Delphinium (Pacific Giant Series) ‘Percival’ establish strong growth and promote abundant flowering throughout the season.
  • Mid-Summer: A light feeding in mid-summer can support continued growth and flowering. Choose a slow-release fertiliser to avoid excessive nutrient buildup.

Pruning

• Deadheading: Regularly deadhead your Delphinium by removing faded flowers. This encourages the plant to focus energy on producing new blooms and helps maintain a tidy appearance.
  • Autumn Pruning: After the flowering period, cut the plant back to the ground to prepare it for winter dormancy. This promotes healthier growth in the following year.

Mulching

• Spring: Apply a layer of mulch around the base of your Delphinium in spring to help retain soil moisture, suppress weeds, and regulate soil temperature. Organic materials such as compost or bark chips work well for this purpose.
  • Winter: In colder months, add a protective layer of mulch around the plant to insulate the roots and prevent frost damage. This ensures the plant survives through winter and is ready for growth when spring arrives.

Supporting the Plant

• Staking: Due to its tall, upright growth, Delphinium (Pacific Giant Series) ‘Percival’ may require staking, especially during windy conditions. Use sturdy supports like plant stakes or hoops to keep the plant upright and prevent the stems from bending or breaking under the weight of the flowers.

Final Tips

Delphinium (Pacific Giant Series) ‘Percival’ is a stunning, low-maintenance perennial that can add height and elegance to your garden. By planting it in full sun, well-drained, fertile soil, and following this care routine, you’ll enjoy tall spikes of striking white flowers from May to July. The plant will also attract beneficial pollinators like bees, making it a valuable addition to any garden. With proper care, your Delphinium will continue to thrive year after year, rewarding you with beautiful blooms and a dramatic garden display.