15-0-15 Dark Weather Feed

This Cal-Mag, no Phosphorus formulation is recommended as a dark weather feed.

15

N

0

P2O5

15

K2O
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Peters Professional 15-0-15 Dark Weather Feed is a high-nitrate, low phosphate formulation for bulbs or other plants needing higher levels of calcium, magnesium, and growing media pH.

  • Pure formulation—no filler substances

  • Effective for all water types, but best in Type 1 and 2 waters.

  • Contains NPK, magnesium, calcium 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

Mix ratios (non-injector)

Fertilizer + Water (gallons) = Approx. N (ppm)
FertilizerWater (gallons)Approx. N (ppm)
1 tsp. (level)1188
1 tbsp. (level)2282
1 cup (level)25360

 

 

Product properties

Potential basicity221 lbs. calcium carbonate equivalent per ton
Conductivity (100 ppm N)0.71 mmhos/cm.
Maximum solubility5 lbs./gal.

 

 

Weight (oz.) of product needed to mix one gallon of concentrate

Target concentration (N/ppm) after dilutionEC (mmhos/cm.) of target feed rate after dilution
Injector ratios
1:151:1001:1281:2001:300
250.32.32.94.56.80.18
500.74.55.89.013.50.36
751.06.88.613.520.30.53
1001.49.011.518.027.00.71
1251.711.314.422.533.80.89
1502.013.517.327.040.51.07
1752.415.820.231.547.31.24
2002.718.023.036.054.01.42
2503.422.528.845.067.51.78
3004.127.034.654.0EMS2.13
3504.731.540.363.0EMS2.49
4005.436.046.172.0EMS2.84
4506.140.551.8EMSEMS3.20
5006.845.057.6EMSEMS3.55
6008.154.069.1EMSEMS4.26
EMS = exceeds maximum solubility

 

 

Gallons of water needed to dissolve one 25 lb. bag of fertilizerEMS = exceeds maximum solubility

Target concentration (N/ppm) after dilutionEC (mmhos/cm.) of target feed rate after dilution
Injector ratios
1:151:1001:1281:2001:300
251185.2177.8138.988.959.30.18
50592.688.969.444.429.60.36
75395.159.346.329.619.80.53
100296.344.434.722.214.80.71
125237.035.627.817.811.90.89
150197.529.623.114.89.91.07
175169.325.419.812.78.51.24
200148.122.217.411.17.41.42
250118.517.813.98.95.91.78
30098.814.811.67.4EMS2.13
35084.712.79.96.3EMS2.49
40074.111.18.75.6EMS2.84
45065.89.97.7EMSEMS3.20
50059.38.96.9EMSEMS3.55
60049.47.45.8EMSEMS4.26
EMS = exceeds maximum solubility

1
Consult rate tables printed on bag labels.
2
Verify product analysis, longevity, 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 Peat-Lite portfolio

Specially formulated for peat-based cultures, the exclusive M-77® chelating package ensures fast, efficient nutrient uptake.

Learn more about Peters Excel Peat-Lite
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