Agricultural Products
Recreational Products

Hay Acid

A trusted preservative for processing your high moisture forage.


At Blue Lake Plastics we trust Hay Green hay acid, which is a preservative solution made up of propionic acid, the best mold-inhibiting agent on the market and proven effective against Aspergillus (produces aflatoxin and ochratoxin). The hay acid we supply allows you to begin baling sooner, at moisture levels up to 30%. The benefits of Hay Green from Blue Lake Plastics are numerous and include:


  • The ability to bale sooner - bale at moisture levels up to 30%
  • Reduced field-curing losses
  • Effective on all types of hay
  • Assists in maintaining hay's green color and natural smell
  • Decreased dust and mold
  • A high percentage of active ingredients - 68% Propionic Acid
  • User-Friendly - safe to use and non-corrosive to your equipment
  • Non-toxic - safe for animal consumption
  • Various amounts available - 2400 lb. Tote or 480 lb. Drum
  • No deposit required on the totes
  • Transfer pumps are available


Hay Green

EPA Registration No. 15265-19 | EPA Establishment No. 15265-WI-001


Hay Green is a buffered propionic acid preservative for processing high moisture hay, corn, grain, silage, haylage and feed blends. Hay Green is a solution of propionic acid, ammonium propionate, citric acid, ammonium citrate, surfactants,and colorant. The minimum propionic acid content is 68.0%. In addition, Hay Green also contains 2.50% citric acid. The total concentration of working ingredients is 77.5% - a maximum of only 22.5% water. The pH is controlled at 5.6 to 5.8 with a specific gravity of 1.065-1.075 (8.9#/gl). The Citric Acid has significant benefits when baling high moisture hay. Citric acid imparts a sweeter fragrance to the hay and the hay stays green in color. The hay retains a couple of percent more moisture on drying. Citric Acid allows baling at a higher moisture level than normally recommended - a benefit when weather does not allow drying as low as would be preferred.


Application: Apply Hay Green by spraying on the hay as it passes over the pick-up head of the baler. Make sure uniform coverage is obtained by proper sizing and location of the spray nozzles.


Moisture Level (%)

<22% Stem Moisture

<22% Dew Moisture

22-26% Stem Moisture

22-26% Dew Moisture

27-30% Stem Moisture

27-30% Dew Moisture

Small Square & Large Round Bales







Large Square Bales





Do no bale



*Not recommended for use on hay above 30% moisture.


Application Guidelines:

  1. Test baled hay often for moisture levels to determine the proper application rate.
  2. Make sure spray nozzle openings and placement are such that good coverage is obtained.
  3. Make sure that the storage area for the baled hay is well ventilated. A buildup of moisture is detrimental to the building as well as to hay treated for lower moisture levels.
  4. Do not store untreated dry hay on top of treated wet hay.

Storage: Hay Green will not freeze above -30°F. Freezing will not deteriorate the product. However, because of the high concentration of citric acid it is possible for some crystallization of citric acid. If this occurs the product must be stirred to redissolve the citric acid crystals.


[Hay Green information and specifications provided by Wausau Chemical Corporation]


Messer Repair & Fabricating, LLCDairyland Supply, Inc.Villard Implement Co.Arena Warehouse