Vegetables Gardening - Growing Organic Vegetables

Hello,

My apologies if this topic has been covered before. This is my first year of Mittleider gardening after 35 years of organic. So far, I love it!

We have made planters on casters for the deck of our rental house. Each planter box measures 5 foot x18 inches x10 inches deep. I am using a blend of 50% sawdust, 35% peat moss, 15% perlite. I can't use sand or the planters will be much too heavy. The seedlings that I have raised with this blend are flourishing, as are plants growing in 5 gallon pots.

For the 5 foot planter boxes, if I use the '1 oz to 1 linear foot of Pre-Plant' method, I calculate that I need 5 oz of Pre-Plant... 24 teaspoons or 8 tablespoons. If I use the Mittleider seedling flat method ( 9 teaspoons per 0.5 cubic foot), I calculate that I need 112 teaspoons, or 37.5 tablespoons... because each planter box is 6.25 cubic feet.

Is my math wrong? Which calculation should I use? I contemplated just splitting the difference, but I thought maybe I should ask for advice instead.

Thanks very much!
Lia

Lia Group:

Use 1 ounce per linear foot of Pre-Plant Mix and 1/2 ounce of Weekly Feed Mix.

Jim Kennard

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