Nutrient monitoring of Calceolaria, Cineraria, and Primula
Calceolaria can be propagated from seed or vegetative stem-tip cuttings. During production, calceolaria require low fertility of 100 to 150 ppm N. They prefer a pH within the range of 5.5 to 6.2. Substrate pH values above 6.2 can inhibit iron availability and induce interveinal chlorosis or yellowing of the upper foliage.
Cineraria require low fertility of 100 to 150 ppm N. They prefer a pH within the range of 5.8 to 6.2. Substrate pH values above 6.2 can inhibit iron availability and induce interveinal chlorosis or yellowing of the upper foliage.
Primula require low fertility of 100 to 150 ppm N. They prefer a pH within the range of 5.5 to 6.2. Substrate pH values above 6.2 can inhibit iron availability and induce interveinal chlorosis or yellowing of the upper foliage. Primula are sensitive to excessive soluble salts [referred to as electrical conductivity (EC)] and may result in marginal leaf burn or necrosis.
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