Plant Foods
Orchid Magic 13‑3‑15 Fertilizer
The original MSU formula, trusted by serious orchid growers since the 1990s. Balanced nitrogen, low phosphorus, and elevated potassium engineered for orchid biology — with calcium, magnesium, and micronutrients for vibrant blooms and healthy roots.
How to use
Directions (per gallon of water)
- Seedlings / baby plants 1 tsp (5 mL) weekly
- Maintenance feeding 1 tbsp (15 mL) weekly
- Active growth / bloom push 2 tbsp (30 mL) weekly
Flush with plain water every 4th watering.
Why the MSU formula
Developed at Michigan State University and trusted by serious orchid growers since the 1990s, the MSU formula pairs balanced nitrate-based nitrogen with low phosphorus and elevated potassium — the ratio orchids actually use. Perfect for phalaenopsis, cattleya, bromeliads, and tropical houseplants.
Guaranteed analysis
Total Nitrogen (N) 1.4% · Available Phosphate (P₂O₅) 0.32% · Soluble Potash (K₂O) 1.6% · Calcium 0.54% · Magnesium 0.21% · Iron, Manganese, Zinc, Copper, Boron & Molybdenum.
Derived from calcium nitrate, potassium nitrate, ammonium sulfate, magnesium sulfate, phosphoric acid and micronutrients.
Why Rubisco?
Rubisco is the most abundant protein on Earth — the enzyme that turns sunlight, CO₂, and water into the carbohydrates that feed every plant. We named our brand after it because we believe great fertilizer should support, not replace, the plant's own machinery.
Our formulas follow the published MSU “Pure Water” specification: 13-3-15 NPK, balanced calcium and magnesium, complete micronutrients, and a 19:81 ammoniacal-to-nitrate nitrogen ratio. The same ratios used in research and commercial orchid greenhouses.
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