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Soil and leaf samples were analysed in an attempt to identify the causes of leaf-tip scorch commonly observed in cultivated Protea sussannae and Protea eximia hybrid ‘Sylvia’. Leaf-tip scorch was hypothesised to be caused by nutritional problems. Soil and leaf mineral contents were measured and compared between healthy plants and those suffering from leaf-tip scorch. Leaf-tip scorch was found to be...
Inflorescence initiation in Protea cv. Carnival (P. compacta R. Br.xP.neriifolia R. Br.) starts at spring budbreak, and production of involucral bracts occurs concurrently with spring flush elongation. The presence of mature leaves on an over-wintering shoot is essential for inflorescence initiation on the spring growth flush of 'Carnival' indicating that conditions prevailing during winter, whether...
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