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Iberis sempervirens 'Alexander's White' is a delightful, low-growing perennial prized for its profuse clusters of pure white flowers and tidy, evergreen foliage. This candytuft variety adds a crisp, bright accent to rock gardens, borders, and edging, offering charm throughout the seasons.
Description:
Dimensions: Grows to a height of 6-12 inches with a spread of 12-18 inches. It forms a compact, spreading mound with small, dark green, leathery leaves that remain attractive year-round.
Sun Exposure: Prefers full sun to part shade, ideally receiving 4-6 hours of direct sunlight daily. Thrives in bright conditions but tolerates some afternoon shade in hotter climates.
Water Requirements: Prefers well-drained soil with moderate watering. Drought-tolerant once established, it performs best with occasional watering, allowing soil to dry between sessions.
Hardiness Zones: Hardy in Zones 3-9.
Bloom Time: Blooms in late spring to early summer with dense, flat-topped clusters of brilliant white flowers that blanket the plant, attracting early pollinators.
Pruning: Shear lightly after flowering to maintain a neat shape and encourage fresh foliage growth. Avoid heavy pruning to preserve its natural form.
How to Plant:
Location: Ideal for rock gardens, borders, edging, or as a ground cover in sunny to partially shaded areas. Prefers well-draining soil and spots where its white blooms can shine.
Soil Preparation: Use well-draining soil with a neutral to slightly alkaline pH. Incorporate sand or gravel if needed to improve drainage and prevent waterlogging.
Planting: Dig a hole slightly larger than the root ball. Place the plant in the hole, ensuring the top of the root ball is level with the soil surface.
Spacing: Space plants 12-18 inches apart to accommodate their mature spread and create a cohesive, carpet-like effect.
Watering: Water thoroughly after planting and keep soil moderately moist during the first growing season. Reduce watering once established, as it adapts to drier conditions.
Fun Fact: Iberis sempervirens 'Alexander's White' is named for its striking, snow-white blooms that evoke purity and elegance. Its evergreen nature and early-season flowering make it a timeless favorite for brightening gardens and providing a low-maintenance, polished look year-round.