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N3f
Originally created by Burgeff (1936), reprinted by Withner (1953). Germination of Cyps. Orchid Journal, 2, 473-7.
Components to be dissolved in the following order to avoid precipitation.
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Citric acid
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90 mg
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K2HPO4
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250 mg
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MgSO4 * 7 H2O
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250 mg
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KCl
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250 mg
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FeSO4
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20 mg
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Ca(NO3) 2 * 4 H2O
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1000 mg
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(NH4) 2SO4
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250 mg
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Sucrose
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20 g
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Agar
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12-15 g
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Sucrose may be replaced with 10 g glucose + 10 g fructose.
Source: Rasmussen, H. Terrestrial orchids from seed to mycotrophic plant. Cambridge University Press, Cambridge. 1995.
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