The Crimson Pygmy Barberry (Berberis thunbergii 'Crimson Pygmy') is a popular, slow-growing dwarf shrub known for its vibrant, deep burgundy-red foliage that provides excellent color contrast in gardens, thriving in full sun and well-drained soil, offering year-round interest with tiny yellow spring flowers, red berries in fall, and notable deer resistance, making it ideal for low hedges, borders, and foundation plantings. 
Key Characteristics
Foliage: Deep crimson to burgundy, turning redder in fall.
Size: Compact, typically growing 18-24 inches tall and 2-3 feet wide.
Flowers: Small, pale yellow, often overlooked, appearing in spring.
Fruit: Bright red berries that persist into winter, attracting birds.
Stems: Sharply spined, good for natural barriers.
Hardiness: Hardy in USDA Zones 4-8.