Fertilizing Small Containers – 5 gallons as Starting Point

Q. How much Pre-Plant and how much Weekly Feed should I add to each 5 gallon pail of custom soil?

We have various sizes containers (all over 8 inches deep) so I figure I can just fill the containers one at a time with the 5 gallon pails’ mixture.

A. We apply 2# of Pre-Plant to a soil-bed or Grow-Box that’s 18″ wide and 30′ long. That figures out to about 2 ounces per cubic foot of soil.

A 5 gallon bucket contains 2/3rds of a cubic foot, therefore you would mix 1 1/3rd ounce (8 teaspoons) of Pre-Plant Mix – and half that amount of Weekly Feed, or 2/3rds of an ounce (4 teaspoons).

It would be easier to mix 15 gallons at a time, which is 2 cubic feet and would require 4 ounces (1/2 cup) of Pre-Plant and 2 ounces (1/4 cup) of Weekly Feed.