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Salvia patens 'Blue Angel' is a superb half-hardy perennial for UK gardens, bursting to life with cobalt-blue blooms. Mid-green foliage is clump forming, filling branches and stems with backdrop colour. Salvia patens 'Blue Angel' has a neat and compact habit, making it ideal for borders and containers. Give some shelter and protection in the cold winter months and it will spring back into life every year. Height: 60cm (24). Spread: 45cm (18).