Silage & Hay Inoculant

Si-Lac Extra


For Australian Weather Conditions

Whether you are making hay or making silage, Si-Lac Extra is your first choice in silage and hay inoculants. Tried and trusted in the Australian market, Si-Lac Extra uses the unique “Fresh Culture” Si-Lac technology that delivers fresh, actively growing and fast acting bacteria to your hay or silage.

Containing 3 Bacteria:

Lactobacillus plantarum

Enterococcus faecium

Lactobacillus buchneri


  • Si-Lac Extra is ideal for use when making high-moisture hay, be it high-quality lucerne, oaten hay, or for hay produced from failed crops
  • Si-Lac Extra is an Australian developed fresh culture inoculant containing three different bacteria that create a stable temperature in the baled hay
  • Si-Lac Extra aids in reducing heating and decomposition of high moisture hay by eliminating the aerobic, composting bacteria that attack high moisture feed
  • Si-Lac Extra can be used when making small square bales, large squares, or round bales

High Moisture Hay

Seasonal conditions can highlight the problem of showery weather and high humidity causing difficulties in making hay due to crops being unable to be dried sufficiently to bale in these conditions. Continued turning for drying purposes may result in loss of leaf and quality. In many cases, hay ends up mouldy and of poor quality when eventually baled with higher than desired moisture. Further problems with potential fires can arise if moist hay is stacked.

Additionally, when unfavourable seasonal conditions occur, there may be times when “failed” or poor crops that will not achieve high grain yields may be cut for hay. Most of these crops of wheat, barley, triticale, grain legumes or canola contain a mix of leaf, stem and grain heads or pods, resulting in uneven drying and high moisture levels.


  • Allows hay to be made when moisture levels are up to 25%
  • Enables earlier baling, helping with the weather risk
  • Increases in strength - up to 10 times - once mixed
  • Long tank mix life - once mixed, lasts for 5-14 days depending on temperature
  • Will not foul tanks and nozzles - suitable for use with 50 mesh filters
  • Helps maintain quality - by retaining leaf through less turning
  • Lower growth of yeast and moulds
  • Does not require continuous refrigeration
  • Suitable for all crops
  • User friendly
  • Cost effective - offers great value for money

Important Application Guidelines

  • Always read and heed the label
  • For best results, SI-LAC EXTRA is applied to hay as it is baled. The inoculant mixture is sprayed from a nozzle mounted in the throat of the baler over the hay after it has been picked up prior to compaction
  • Ensure that applicators are properly calibrated to deliver the correct amount of SI-LAC EXTRA per bale and per tonne
  • Ensure that all bales are treated. If untreated hay is baled and stacked with SI-LAC EXTRA treated hay, the untreated bales may heat and cause the whole hay-stack to catch fire

Contact Grevillea Ag Today

Get in touch with our knowledgeable, friendly team today.



Grevillia AG

“There must be a better way.” That was the conclusion reached by businessman and farmer John Lever on his cattle property “Grevillia”.


10 Bult Dr,
Brendale QLD 4500

Phone Number

(07) 3205 1788

Customer Service

Australia: 1300 669 556
New Zealand: 0508 473 845