Where to source amendments

From your local farm supply or hydro 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 Wollastonite:
Online source for Phosphoric acid stabilized fish hydrolysate (approximately 2-4-0)
Vermicompost
Online amendment sources:
Where to find minerals 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 Amazon.ca or ebay.ca
Can't find the right amendment?