Erysimum, commonly known as Wallflowers, are delightful perennials known for their vibrant flowers and pleasant fragrance. To ensure the successful cultivation of your Erysimum plants, follow this comprehensive planting guide:
Site Selection
Sunlight Requirements: Plant Erysimum in a location that receives full sunlight. These plants thrive in at least 6 hours of direct sunlight daily.
Soil Conditions: Choose well-draining soil with a slightly alkaline to neutral pH (7.0-7.5). Erysimum prefers fertile soil but can adapt to various soil types.
Planting Time
Optimal Timing: Plant Erysimum in the early spring or Autumn. This allows the plants to establish before extreme temperatures and ensures robust growth.
Planting Process
Prepare the Soil: Work the soil to a depth of 12 inches, incorporating organic matter for improved fertility. Ensure excellent drainage to prevent waterlogging.
Planting Depth: Dig a hole slightly larger than the root ball. Place the plant in the hole at the same depth it was growing in the nursery container.
Spacing: Space plants 12-18 inches apart to allow for proper air circulation and prevent overcrowding.
Watering
Establishment Period: Water the plants consistently during the first few weeks after planting to help them establish. Once established, Erysimum is drought tolerant. However, provide supplemental watering during prolonged dry spells.
Mulching
Mulch Maintenance: Maintain a 2-inch layer of organic mulch around the base of the plants to help retain soil moisture, regulate temperature, and suppress weeds.
Fertilisation
Balanced Feeding: Apply a balanced, slow-release fertiliser in spring when new growth appears. Follow the package instructions for the recommended dosage.
Support
Staking: Erysimum typically doesn’t require staking. However, tall varieties may benefit from support in windy conditions. Install stakes at planting time or as needed.
Pruning
Deadheading: Regularly remove spent flower heads to encourage continuous blooming. Prune back leggy growth to maintain a compact shape.
Pest and Disease Management
Aphid Control: Keep an eye out for aphids, especially on new growth. Use insecticidal soap or a strong stream of water to control infestations.
Good Air Circulation: Ensure proper spacing between plants to promote good air circulation, reducing the risk of fungal diseases.
Winter Care
Minimal Winter Care: Erysimum is generally hardy but benefits from a layer of mulch in colder climates to protect the roots during winter.
Monitoring and Adjustment
Visual Inspection: Regularly inspect your Erysimum for any signs of stress, pests, or diseases. Adjust watering and care practices based on your observations.
By following this planting guide, you’ll establish a beautiful display of Erysimum in your garden. Adapt care practices based on your specific growing conditions and enjoy the vibrant colours and sweet fragrance that Erysimum brings to your landscape.