Prunus 'Spire'The ornamental cherry 'Spire' is a slow growing small deciduous tree, which initially grows narrow, almost columnar and whose trunk ends at the beginning of the crown. The dense branches of Prunus hillier Spire that grow upright form a narrow conical crown. The tree shines wit wonderful colour effects in summer and autumn. It is a very appealing winter hardy cherry which demands little space for thriving. The leaves of Prunus Spire appear alternate on