This is the 2nd year I've used my Earth Box. This is significant because the 1st year, you get to use all the included fertilizer, soil, and dolomite included and pre-measured with the new Earth box kit. Now I have to come up with my own ingredients for subsequent years.

I went to
Yamagami's because they always have an Earth Box expert there. I was surprised they recommended I use organic Potting SOIL instead of potting MIX. The Earth Box instructions tell you (about 10 times over) that you must use potting MIX! Then, instead of giving me the 10-10-10 fertilizer recommended by the Earth Box Instructions, they gave me 5-7-3. A Dr Earth fertilizer rep was there, and told me how their fertilizer was 100% organic. This confused me because I thought that only compost was considered organic. Anyway ... the 3rd thing they told me is that I don't need to add any Dolomite to this potting soil, because it already has it I guess. Hmm. Well, since I've broken all the Earth Box rules, this will be an interesting experiment.
Here is how the 2 cups of fertilizer are placed on top of the full earth box for a 6 or 8 plant setup.

You don't mix fertilizer into the soil. It is supposed to lay on top, and it leaches down into the soil slowly over time. Also, you cannot let the fertilizer touch the plants. That is why it's concentrated into a strip. The plants will sit on either side of the strip. If you have a different number of plants, the fertilizer strip may be in a different place.

Finally, you cover the earth box with the bonnet and plant your seedlings. These are a 6 pack of strawberries I bought from Yamagami's. I have tried growing strawberries from seed before, and it is extremely difficult to do. I think buying these as seedlings is a good idea.