Understanding the NPK Ratio for Orchids
Standard houseplant fertilizers contain heavy concentrations of nitrogen, phosphorus, and potassium intended for soil. Orchids grow in bark or sphagnum moss and require a balanced, water-soluble specialty formula diluted heavily in water:
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Balanced Maintenance (20-20-20): Ideal for general year-round feeding during vegetative leaf and root growth.
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Bloom Booster (10-30-20): Formulated with elevated phosphorus to promote flower spike initiation in autumn.
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Urea-Free Formulations: Always choose fertilizers where nitrogen is derived from nitrate or ammoniacal sources rather than urea, as orchids lack soil microbes needed to break down urea.
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