A bushy perennial with starry bright yellow flowers carried on tall wiry stems with narrow, finely dissected leaves. Height and spread 45cm. Flowers from June to September. Full sun. Well drained soil. Hardy.
Coreopsis verticillata ‘Zagreb’ is a vibrant and hardy perennial known for its stunning star-shaped, bright yellow flowers and wiry stems. This bushy plant, with its delicate, finely dissected leaves, blooms from June to September, making it a perfect addition to any garden. Follow this detailed planting and care guide to ensure your Coreopsis verticillata ‘Zagreb’ thrives year after year.
PLANTING and AFTERCARE GUIDE
Best Planting Time
Spring: The best time to plant Coreopsis verticillata ‘Zagreb’ is in early spring when the soil has warmed up. Planting in spring allows the roots to establish before the flowering season, ensuring a healthy and vibrant plant.
Autumn: Alternatively, Coreopsis can be planted in early autumn. This gives the plant time to settle in before the cooler months and promotes strong growth in the following spring.
Site Selection
Sunlight: Coreopsis thrives in full sun. Choose a spot that receives at least six hours of direct sunlight each day to encourage abundant blooming and healthy growth.
Soil: Ensure well-drained soil for Coreopsis verticillata ‘Zagreb’. This plant does not tolerate waterlogged conditions, so good drainage is essential. Enhance the soil’s fertility and drainage by incorporating organic matter, such as compost.
Planting Instructions
Prepare the Hole: Dig a hole that is twice as wide and the same depth as the root ball of your Coreopsis. This will allow the roots to spread and grow comfortably.
Soil Preparation: Mix compost or other organic matter into the soil to improve both fertility and drainage. Coreopsis verticillata ‘Zagreb’ thrives in nutrient-rich soil, which supports strong growth and vibrant blooms.
Planting: Place the the plant into the hole, ensuring the top of the root ball is level with the surrounding soil surface. Backfill the hole with soil, gently firming it to eliminate air pockets.
Watering After Planting: Water your Coreopsis verticillata ‘Zagreb’ thoroughly after planting. This helps settle the soil and encourages the roots to establish. Ensure the area drains well to avoid any waterlogging.
Watering Requirements
Growing Season: Once established, Coreopsis is moderately drought-tolerant. Water during dry spells, allowing the soil to dry out slightly between waterings. Avoid overwatering, as this can lead to root rot.
Dormant Season: During the dormant season, reduce watering significantly. Coreopsis verticillata ‘Zagreb’ requires minimal moisture when not actively growing, so only water if the soil becomes excessively dry.
Feeding
Early Spring: In early spring, apply a balanced fertiliser to Coreopsis verticillata ‘Zagreb’ to encourage strong growth and a flourishing bloom season. A healthy start will ensure the plant thrives.
Mid-Summer: A light feeding in mid-summer will help maintain the vitality of your Coreopsis and ensure continuous blooms throughout the summer.
Pruning
Deadheading: Regularly deadhead your Coreopsis verticillata ‘Zagreb’ by removing spent flowers. This practice encourages the plant to produce more blooms and keeps it looking neat and tidy.
Autumn Pruning: After the last blooms have faded, cut back to ground level. This helps prepare the plant for winter dormancy and ensures healthy growth the following year.
Mulching
Spring: Apply a layer of mulch around the base of your Coreopsis verticillata ‘Zagreb’ in spring. This helps to retain moisture, suppress weeds, and regulate soil temperature during the growing season.
Winter: Mulch around the plant in winter to protect the roots from cold temperatures and frost. This helps prevent frost heaving and ensures the plant survives through the colder months.
Supporting the Plant
Staking: Coreopsis verticillata ‘Zagreb’ has sturdy, wiry stems, and typically does not require staking. However, in very windy areas or for extra support, you may want to stake the plant to keep it upright.
Final Tips
Coreopsis verticillata ‘Zagreb’ is a low-maintenance, hardy perennial that adds vibrant colour to any garden. With its bright yellow flowers and finely dissected leaves, it makes an excellent choice for borders, beds, or containers. By planting Coreopsis verticillata ‘Zagreb’ in full sun and well-drained soil, and following this care routine, your plant will reward you with stunning blooms from June to September. This beautiful and easy-to-care-for plant will enhance your garden with its long-lasting flowers and cheerful presence all season long.
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