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Peters Excel pHLow 15-7-25 High-Mag / High-K contains elevated levels of magnesium and potash to provide plants the nutrition they need to thrive while managing the alkalinity of your irrigation water.
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Versatile, all-purpose formulation for constant, balanced nutrition
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Pure formulation—no filler substances
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Effective for water types 2,3 and 4
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Elevated levels of chelated trace elements ensure robust growth and rich color
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Contains NPK, magnesium and micronutrients
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Developed for peat-based cultures (pot plants, bedding plants, and container nursery stock)
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Exclusive M-77® black iron chelating formula for fast, efficient nutrient uptake
Concentration (ppm N) fertilizer | Average alkalinity reduction (ppm total alkalinity) |
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100 | 20 |
200 | 40 |
300 | 50 |
400 | 70 |
Mix ratios (non-injector)
Fertilizer + Water (gallons) = Approx. N (ppm)Fertilizer | Water (gallons) | Approx. N (ppm) |
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1 tsp. (level) | 1 | 235 |
1 tbsp. (level) | 2 | 353 |
1 cup (level) | 25 | 452 |
1 pound | 100 | 180 |
Product properties
Potential acidity | 87.14 lbs. calcium carbonate equivalent per ton |
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Conductivity (100 ppm N) | 0.91 mmhos/cm. |
Maximum solubility | 3.5 lbs./gal. |
Weight (oz.) of product needed to mix one gallon of concentrate
Target concentration (N/ppm) after dilution | EC (mmhos/cm.) of target feed rate after dilution | |||||
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Injector ratios | ||||||
1:15 | 1:100 | 1:128 | 1:200 | 1:300 | ||
25 | 0.3 | 2.3 | 2.9 | 4.5 | 6.8 | 0.23 |
50 | 0.7 | 4.5 | 5.8 | 9.0 | 13.5 | 0.46 |
75 | 1.0 | 6.8 | 8.6 | 13.5 | 20.3 | 0.68 |
100 | 1.4 | 9.0 | 11.5 | 18.0 | 27.0 | 0.91 |
125 | 1.7 | 11.3 | 14.4 | 22.5 | 33.8 | 1.14 |
150 | 2.0 | 13.5 | 17.3 | 27.0 | 40.5 | 1.37 |
175 | 2.4 | 15.8 | 20.2 | 31.5 | 47.3 | 1.59 |
200 | 2.7 | 18.0 | 23.0 | 36.0 | 54.0 | 1.82 |
250 | 3.4 | 22.5 | 28.8 | 45.0 | EMS | 2.28 |
300 | 4.1 | 27.0 | 34.6 | 54.0 | EMS | 2.73 |
350 | 4.7 | 31.5 | 40.3 | EMS | EMS | 3.19 |
400 | 5.4 | 36.0 | 46.1 | EMS | EMS | 3.64 |
450 | 6.1 | 40.5 | 51.8 | EMS | EMS | 4.10 |
500 | 6.8 | 45.0 | EMS | EMS | EMS | 4.56 |
600 | 8.1 | 54.0 | EMS | EMS | EMS | 5.47 |
Gallons of water needed to dissolve one 25 lb. bag of fertilizer
Target concentration (N/ppm) after dilution | EC (mmhos/cm.) of target feed rate after dilution | |||||
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Injector ratios | ||||||
1:15 | 1:100 | 1:128 | 1:200 | 1:300 | ||
25 | 1185.2 | 117.8 | 138.9 | 88.9 | 59.3 | 0.23 |
50 | 592.6 | 88.9 | 69.4 | 44.4 | 29.6 | 0.46 |
75 | 395.1 | 29.3 | 46.3 | 29.6 | 19.8 | 0.68 |
100 | 296.3 | 44.4 | 34.7 | 22.2 | 14.8 | 0.91 |
125 | 237.0 | 35.6 | 27.8 | 17.8 | 11.9 | 1.14 |
150 | 197.5 | 29.6 | 23.1 | 14.8 | 9.9 | 1.37 |
175 | 169.3 | 25.4 | 19.8 | 12.7 | 8.5 | 1.59 |
200 | 148.1 | 22.2 | 17.4 | 11.1 | 7.4 | 1.82 |
250 | 118.5 | 17.8 | 13.9 | 8.9 | EMS | 2.28 |
300 | 98.8 | 14.8 | 11.6 | 7.4 | EMS | 2.73 |
350 | 84.7 | 12.7 | 9.9 | EMS | EMS | 3.19 |
400 | 74.1 | 11.1 | 8.7 | EMS | EMS | 3.64 |
450 | 65.8 | 9.9 | 7.7 | EMS | EMS | 4.10 |
500 | 59.3 | 8.9 | EMS | EMS | EMS | 4.56 |
600 | 49.4 | 7.4 | EMS | EMS | EMS | 5.47 |
Brand details
This product is part of the Peters Excel pHLow portfolio
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The acidifying action of Excel pHLow stabilizes pH levels in all types of growing media.
Learn more about Peters Excel pHLow