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From your local farm supply or grower's supply store:
  • Ag lime
  • Dolomite lime
  • Gypsum
  • Soft rock phosphate (see below for Fertoz)
  • Bone meal
  • Magnesium sulfate (Epsom salts) Small quantities are at the drug store in the laxative aisle
  • Potassium sulfate
  • Sul-Po-Mag (K-Mag or Langbienite)
  • Ag sulfur (Tiger-90)
  • Feather meal (may be listed as a feed, or available at the feed store instead)
  • Soybean meal (may be listed as a feed, or available at the feed store instead)
  • Kelp

If you have a small area you may be able to find smaller quantities at your local garden supply store.

From Alpha Chemicals:

The sulfates are available online from Alpha Chemicals. These include:

  • Iron sulfate
  • Manganese sulfate
  • Zinc sulfate
  • Copper sulfate pentahydrate
  • Sodium molybdate dihydrate
From the grocery store:

In the laundry products aisle:

  • Borax
Source for BioMin Copper:
Source for Cobalt Sulfate:
Source for Fertoz Soft Rock Phosphate
  • Fertoz (offices in the US and Canada)
Source for Wollostonite
Source for CropSil (Bio-available silicon)
Online source for Phosphoric acid stabilized fish hydrolysate (approximately 2-4-0):
Online Amendment Sources:
Where to find amendments in Canada:
  • Local feed stores. Buckerfields is one of them.  Also a commercial outfit called Evergrow in Victoria. Also Integrity Sales in Victoria. There are some stores out here on the West Coast that are more organically oriented and have a better selection (Borden Mercantile in Victoria, for instance). Many of these stores are able to source special products
  • Black Swallow Living Soils (thanks for the link, David!)
  • Alpha chemical resellers may be found on or

Do you need to use different amendments than those in your OrganiCalc recommendation?  Use our Amendment Converter to find out how much to use.

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