How much does each amendment weigh?

Jeremy Silva on

I'm often asked how much each one of our soil amendments weigh. 

 

Here is a short post to help, rounded to nearest half ounce.

 

1lb = 16oz

1 Cup = 16 Tablespoons

1 Cubic Foot is equal to about 7.5 gallons of soil.

1/2 Cup Per Cubic Foot = about 1 Tablespoon per gallon.

Most amendments are recommended to be used with 1/2 Cup Per Cubic Foot of Soil and that Works out to about 1 Tablespoon Per Gallon of Soil.

Amendment Name:

Weight In Ounces Per Cup:
Fish Bone Meal   8 Ounces 
Crustacean Meal 7 Ounces
Kelp Meal 7.5 Ounces
Neem Cake 6.5 Ounces
Alfalfa Meal 2 Ounces
Oyster Flour 8 Ounces
Gypsum 9 Ounces
Soft Rock Phosphate 9 Ounces

Glacial Rock Dust

 9 Ounces

Barley Seed

 6 Ounces

Worm Castings

 7 Ounces

 

 

Anything else I should weigh?

Tags: Research on Soil Amendments Useful Links and Free Info

5 comments

Nick W @ Mon, Oct 26, 20

I meant 8 cups per pound not gallon.

Nick W @ Mon, Oct 26, 20

I see u have alfalfa meal at 2oz per cup but that would be 8 cups per gallon…..your alfalfa meal says 10# bag is 39 cups? Can you clarify this for me? Thanks!

Dylan @ Mon, Oct 26, 20

It might be helpful to have conversions in both directions by saying how many cups are in one pound. Something along these lines: “there is about 2 cups in one pound of fish bone meal”. It is a bit redundant, but for those people who are bad at math, it could simplify things a bit.

BuildASoil @ Mon, Oct 26, 20

Thanks for the question Nick! I Just updated the blog to reflect the weight. EWC are about 7 pounds per gallon.

Nick @ Mon, Oct 26, 20

An average weight per cf maybe of your worm castings? However would be easiest :)

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