Jack's Professional 21-5-20 All Purpose LX Water Soluble Fertilizer, 25 lbs.
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Jack's Professional 21-5-20 All Purpose LX Water Soluble Fertilizer, 25 lbs.

Jack's Professional 21-5-20 All Purpose LX Water Soluble Fertilizer, 25 lbs.

SKU: JRP77990
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Jacks Nutrients Brand ProductMultiple Units? Click for Volume Pricing.

Availability: In stock

Lead time: This product ships in 3-5 business days

Price:
$62.56

Jacks Nutrients Product Documents

Jacks Professional 21-5-20 All Purpose LX Water Soluble Fertilizer Label Jacks Professional 21-5-20 All Purpose LX Water Soluble Fertilizer MSDS

This is the ideal fertilizer for moderate to high alkalinity water. This complete formula keeps magnesium and phosphorus soluble in concentration giving the grower ultimate flexibility when adjusting their nutrient program. It can be tank mixed with 15-5-15, other Jack's LX formulas as well as Calcium nitrate and or magnesium nitrate.

For Use On: All bedding and potted plants, can be used for plugs at low rates

Jacks Professional 21-5-20 All Purpose LX Water Soluble Fertilizer Guaranteed Analysis

  • Total Nitrogen (N)......21%
    • 7.92% Ammoniacal Nitrogen
    • 13.08% Nitrate Nitrogen
  • Available Phosphate (P205)......5%
  • Soluble Potash (K2O).......20%
  • Boron (B).......0.021%
  • Copper (Cu)........0.0105%
    • 0.0105% Chelated Copper (Cu)
  • Iron (Fe)........0.105%
    • 0.105% Chelated Iron (Fe)
  • Manganese (Mn)........0.0525%
    • 0.0525% Chelated Manganese (Mn)
  • Molybdenum (Mo).......0.0105%
  • Zinc (Zn).......0.0525%
    • 0.0525% Chelated Zinc

Derived From: Ammonium Nitrate, Monopotassium Phosphate, Potassium Nitrate, Magnesium Sulfate, Boric Acid, Iron EDTA, Manganese EDTA, Zinc EDTA, Copper EDTA, Ammonium Molybdate

Elemental Concentraion

100 ppm N Solution Contains the Following Elemental ppm
Nitrate - N (NO3) 62.3
Ammonium - N (NH4) 37.7
Urea - N (Urea) 0.0
Phosphorus (P) 10.4
Potassium (K) 79.1
Calcium (Ca) 0.0
Magnesium (Mg) 0.7
Boron (B) 0.1
Copper (Cu) 0.05
Iron (Fe) 0.5
Manganese (Mn) 0.25
Molybdenum (Mo) 0.05
Zinc (Zn) 0.25

Mixing Instructions
Chart displays the amount of dry fertilizer (oz.) to add to each gallon of water to make a concentrated solution. Please check your injector setting before use.

Mixing Table

Desired N Feed Rate 1:15 1:100 1:200 E.C. Value
50 ppm 0.48 3.22 6.43 0.32
100 ppm 0.96 6.43 12.86 0.65
200 ppm 1.93 12.86 25.72 1.29

Limit of Solubility = 4.5 lbs per gallon

Important Notes:
E.C. value is the best method to determine fertilizer strength. Fertilizer appearance may vary in color due to variation in raw material size and tracer dye distribution upon the particles in the bag. In solution, color will remain consistent.

For best results, use warm water to dissolve product. Jack's fertilizers are made with 100% soluble raw materials that will form a true solution. Some raw materials are slower to dissolve than others. Keep stock tank covered to reduce light and debris inputs.

Brand Jacks Nutrients
SKU JRP77990
Weight (lb.) 25.0000
Height (in.)
Width (in.)
Length (in.)
Hazardous Material false
UPC 671341779902
Lead Time 3-5
N-P-K 21-5-20
Nutrient Application Hydroponic and Soil Nutrient
Nutrient Type Inorganic Based
OMRI Certified No
Nutrient Material Type ["Granular"]

What type of water is Jack's Professional 21-5-20 All Purpose LX designed for?

Jack's Professional 21-5-20 All Purpose LX is specifically formulated for moderate to high alkalinity water. The formula keeps magnesium and phosphorus soluble in concentration, giving growers flexibility when adjusting their nutrient program in harder water conditions.

What is the N-P-K ratio of Jack's Professional 21-5-20 All Purpose LX, and does the formula include micronutrients?

Jack's Professional 21-5-20 All Purpose LX carries a 21-5-20 N-P-K ratio, with 21% total nitrogen, 5% available phosphate, and 20% soluble potash. The formula also includes a full suite of chelated micronutrients: iron, manganese, copper, and zinc (all chelated via EDTA), plus boron and molybdenum.

Can Jack's Professional 21-5-20 All Purpose LX be tank mixed with other fertilizers?

Yes, Jack's Professional 21-5-20 All Purpose LX is compatible with tank mixing alongside Jack's 15-5-15, other Jack's LX formulas, calcium nitrate, and magnesium nitrate. This compatibility gives growers the ability to fine-tune their nutrient program without compatibility concerns.

What plants and growing stages is Jack's Professional 21-5-20 All Purpose LX suitable for?

Jack's Professional 21-5-20 All Purpose LX is suitable for all bedding and potted plants, and can also be used for plugs at low application rates. The fertilizer is approved for both hydroponic and soil growing applications.

How do you mix Jack's Professional 21-5-20 All Purpose LX to reach a target nitrogen feed rate?

The amount of Jack's Professional 21-5-20 All Purpose LX to add depends on your injector ratio and target nitrogen level. For example, to reach 100 ppm nitrogen at a 1:100 injector ratio, add 6.43 oz. of dry fertilizer per gallon of concentrate; at a 1:200 ratio, add 12.86 oz. per gallon. Jack's recommends using warm water to dissolve the granules and checking EC values (0.65 EC at 100 ppm N) to confirm fertilizer strength. The solubility limit is 4.5 lbs per gallon.

Is Jack's Professional 21-5-20 All Purpose LX an organic or OMRI-certified fertilizer?

Jack's Professional 21-5-20 All Purpose LX is an inorganic-based fertilizer and is not OMRI certified. Growers seeking a certified organic option should look for an OMRI-listed alternative.

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