This is intended to be a reference to drastically simplify an individual’s feeding regimen, with example mixing estimates by fertilizer brand or formula. First a few basics:
- These recommendations are intended to produce 100 ppm N solutions, which is a good average concentration for weekly feeding. If you feed every two weeks double the amount.
- The masses of fertilizer in g/L or g/gal are calculated from the fertilizer formula.
- The volumetric values are estimates based upon the following formulas, applicable to all fertilizers:
- 9.2 ÷ %N = ml/L
- 8 ÷ %N = tsp/gal
- It is safe to round the values for ease of measurement.
- If your specific fertilizer brand is not listed, you may use the data from another having the same nitrogen content.
Fertilizer | %N | g/L | g/gal | ml/L | tsp/gal |
Akerne's Rain Mix 11.8-2.7-13.7 | 11.8 | 0.85 | 3.21 | 0.8 | 0.7 |
Better Gro Orchid Better Bloom 11-25-15 | 11 | 0.91 | 3.44 | 0.8 | 0.7 |
Better Gro Orchid Plus 20-14-13 | 20 | 0.50 | 1.89 | 0.5 | 0.4 |
Dyna-Gro Bloom 3-12-6 | 3 | 3.33 | 12.62 | 3.1 | 2.7 |
Dyna-Gro Foliage Pro 9-3-6 | 9 | 1.11 | 4.21 | 1.0 | 0.9 |
Dyna-Gro Grow 7-9-5 | 7 | 1.43 | 5.41 | 1.3 | 1.1 |
Dyna-Gro Orchid Pro 7-8-6 | 7 | 1.43 | 5.41 | 1.3 | 1.1 |
Greencare K-Lite 12-1-1 | 12.9 | 0.78 | 2.93 | 0.7 | 0.6 |
Greencare MSU RO 13-5-15 | 13.2 | 0.76 | 2.87 | 0.7 | 0.6 |
Greencare MSU WW 19-4-23 | 19.3 | 0.52 | 1.96 | 0.5 | 0.4 |
Grow More Orchid Food – Blue 6-30-30 | 6 | 1.67 | 6.31 | 1.5 | 1.3 |
Grow More Orchid Food – Green 20-10-20 | 20 | 0.50 | 1.89 | 0.5 | 0.4 |
Grow More Orchid Food – Pink 30-10-10 | 30 | 0.33 | 1.26 | 0.3 | 0.3 |
Grow More Orchid Food – Yellow 20-20-20 | 20 | 0.50 | 1.89 | 0.5 | 0.4 |
Miracle-Gro Bloom Booster Flower Food 15-30-15 | 15 | 0.67 | 2.52 | 0.6 | 0.5 |
Miracle-Gro Orchid Food 30-10-10 | 30 | 0.33 | 1.26 | 0.3 | 0.3 |
Norman's Optimal Orchid Nutrients 20-16-15 | 20 | 0.50 | 1.89 | 0.5 | 0.4 |
OrchidMix Pure Water 12-6-13 | 12.2 | 0.82 | 3.10 | 0.8 | 0.7 |
OrchidMix Tap Water 17-9-18 | 17 | 0.59 | 2.23 | 0.5 | 0.5 |
Peters Jack’s Cal-Mag 15-5-15 | 15 | 0.67 | 2.52 | 0.6 | 0.5 |
Peters Jack’s Classic Orchid Special 30-10-10 | 30 | 0.33 | 1.26 | 0.3 | 0.3 |
Peters Excel Cal-Mag Finisher 13-5-20 | 13 | 0.77 | 2.91 | 0.7 | 0.6 |
Peters Excel Cal-Mag Grower 15-2-12 | 15 | 0.67 | 2.52 | 0.6 | 0.5 |
SaferGro OrchidMax 20-15-15 | 20 | 0.50 | 1.89 | 0.5 | 0.4 |
Schultz Orchid Food 20-20-20 | 20 | 0.50 | 1.89 | 0.5 | 0.4 |