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21-5-20 Multi-Pupose
21
N5
P2O520
K2OPeters Excel 21-5-20 is a moderately acidic formulation ideal for general purpose use. It can be mixed with other Peters Excel and Excel pHLow products to create numerous custom formulations.
- Pure formulation—no filler substances
- Effective for water types 2, 3, and 4
- Contains NPK and micronutrients
- Developed for peat-based cultures (pot plants, bedding plants and container nursery stock)
- Exclusive M-77® chelating formula for fast, efficient nutrient uptake
- Not compatible with Peters Excel pHLow 21-7-7 Acid Hammer
Mix ratios (non-injector)
Fertilizer + Water (gallons) = Approx. N (ppm)| Fertilizer | Water (gallons) | Approx. N (ppm) |
|---|---|---|
| 1 tsp. (level) | 1 | 320 |
| 1 tbsp. (level) | 2 | 480 |
| 1 cup (level) | 25 | 614 |
| 1 pound | 100 | 252 |
Product properties
| Potential acidity | 390 lbs. calcium carbonate equivalent per ton |
|---|---|
| Conductivity (100 ppm N) | 0.63 mmhos/cm. |
| Maximum solubility | 4 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 | |||||
|---|---|---|---|---|---|---|
| Injector ratios | ||||||
| 1:15 | 1:100 | 1:128 | 1:200 | 1:300 | ||
| 25 | 0.2 | 1.6 | 2.1 | 3.2 | 4.8 | 0.16 |
| 50 | 0.5 | 3.2 | 4.1 | 6.4 | 9.6 | 0.32 |
| 75 | 0.7 | 4.8 | 6.2 | 9.6 | 14.5 | 0.47 |
| 100 | 1.0 | 6.4 | 8.2 | 12.9 | 19.3 | 0.63 |
| 125 | 1.2 | 8.0 | 10.3 | 16.1 | 24.1 | 0.79 |
| 150 | 1.4 | 9.6 | 12.3 | 19.3 | 28.9 | 0.95 |
| 175 | 1.7 | 11.3 | 14.4 | 22.5 | 33.8 | 1.10 |
| 200 | 1.9 | 12.9 | 16.5 | 25.7 | 38.6 | 1.26 |
| 250 | 2.4 | 16.1 | 20.6 | 32.2 | 48.2 | 1.58 |
| 300 | 2.9 | 19.3 | 24.7 | 38.6 | 57.9 | 1.89 |
| 350 | 3.4 | 22.5 | 28.8 | 45.0 | EMS | 2.21 |
| 400 | 3.9 | 25.7 | 32.9 | 51.4 | EMS | 2.52 |
| 450 | 4.3 | 28.9 | 37.0 | 57.9 | EMS | 2.84 |
| 500 | 4.8 | 32.2 | 41.2 | EMS | EMS | 3.15 |
| 600 | 5.8 | 38.6 | 49.4 | EMS | EMS | 3.78 |
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 | |||||
|---|---|---|---|---|---|---|
| Injector ratios | ||||||
| 1:15 | 1:100 | 1:128 | 1:200 | 1:300 | ||
| 25 | 1658.9 | 248.8 | 194.4 | 124.4 | 82.9 | 0.16 |
| 50 | 829.4 | 124.4 | 97.2 | 62.2 | 41.5 | 0.32 |
| 75 | 553.0 | 82.9 | 64.8 | 41.5 | 27.6 | 0.47 |
| 100 | 414.7 | 62.2 | 48.6 | 31.1 | 20.7 | 0.63 |
| 125 | 331.8 | 49.8 | 38.9 | 24.9 | 16.6 | 0.79 |
| 150 | 276.5 | 41.5 | 32.4 | 20.7 | 13.8 | 0.95 |
| 175 | 237.0 | 35.5 | 27.8 | 17.8 | 11.8 | 1.10 |
| 200 | 207.4 | 31.1 | 24.3 | 15.6 | 10.4 | 1.26 |
| 250 | 165.9 | 24.9 | 19.4 | 12.4 | 8.3 | 1.58 |
| 300 | 138.2 | 20.7 | 16.2 | 10.4 | 6.9 | 1.89 |
| 350 | 118.5 | 17.8 | 13.9 | 8.9 | EMS | 2.21 |
| 400 | 103.7 | 15.6 | 12.2 | 7.8 | EMS | 2.52 |
| 450 | 92.2 | 13.8 | 10.8 | 6.9 | EMS | 2.84 |
| 500 | 82.9 | 12.4 | 9.7 | EMS | EMS | 3.15 |
| 600 | 69.1 | 10.4 | 8.1 | EMS | EMS | 3.78 |
1
Consult rate tables printed on bag labels.
2
Verify product analysis and rate for plants in your production system (for assistance, contact your regional ICL Territory Manager or for testing, call the ICL Lab at 877-467-8522).
3
Irrigation frequency and volume should be adjusted during the crop production cycle according to crop type, environmental conditions, and desired soluble salt levels.
4
A product trial is recommended before adopting a new fertilizer program or making full-scale changes to standard cultural practices (test several rates on representative plant types).
5
Store in a clean, cool, dry place.
Brand details
This product is part of the Peters Excel portfolio
Ideal for growing applications with high PH irrigation water.
Learn more about Peters ExcelCan be used together with
Peters Excel
Peters Excel pHLow
Peters Excel pHLow
Peters Excel pHLow
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