First time gardener from Ohio need your help. TIA.

I am planning for vegetable plants in a wooden boxes of size 4 foot x 4 foot x 8 inches (=~ 11 cubic foot). Four of these boxes makes 45 cubic foot approximately.

I filled these four boxes with the soil less medium as following:
Coarse Vermiculite – 15 cubic foot
Sphagnum Peat Moss – 15 cubic foot
`Compost kind of` – 15 cubic foot (1 cubic foot each of below)

I have searched 50+ of garden centers locally (zip code: 45040) and couldn't find so called "COMPOST". For next year I will be preparing my own compost so this question won't arise. But, to begin my first/fresh vegetable garden; in the place of compost I used the following
mix. I mixed them *VERY* thorough spending a week.

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Question: is the following mix 'OK' to begin my garden? Am I sort of something here? Am I going to kill the plants with Over dosage? Any other suggestions/ideas to help myself is greatly appreciated.
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My `Compost kind of` - 15 cubic foot is:

1.Mother Nature's – SWEET PEET – Composted soil conditioner – 1 cubic foot
2.Nea's – POSY POWER – Powerful soil booster – 1 cubic foot
3.Premier Horticulture – PRO MIX – Growing mix – 1 cubic foot
4.Nature's Helper – MUSHROOM COMPOST – Organic soil – 1 cubic foot
5.Garden Magic – COMPOST AND MANURE – Peat & Manure – 1 cubic foot
6.Ace – COMPOSTED MANURE – Loosens soil – 1 cubic foot
7.New Plant Life – MUSHROOM COMPOST SOIL – Soil amendment - 1 cubic foot
8.Garden Scape – PEAT HUMUS – Decomposed Organic … - 1 cubic foot
9.Garden Scape – COW MANURE – will not burn – 1 cubic foot
10.Organic Valley – HUMUS – ready to use – 1 cubic foot
11.Organic Valley – COW MANURE PLUS ORGANIC COMPOST – Ready to use – 1 cubic foot
12.Organic Valley – ORGANIC COMPOST PLUS MANURE – Compost & manure – 1 cubic foot
13.Garick – MOO NURE – Organic Compost with Cow Manure – 1 cubic foot
14.Country Stone – COMPOSTED COW MANURE – Soil conditioner – 1 cubic foot
15.Earth Gro – ORGANIC HUMUS AND MANURE – Soil amendment – 1 cubic foot

Thanks & Regards
Ganesh

In detail (if you are still reading this post ;-) ) Assuming the
product is what the cover says.

1.Mother Nature's – SWEET PEET – Composted soil conditioner – 1 cubic foot
Organic material made from wood shavings, farm manure & plant fibers (USCC)

2.Nea's – POSY POWER – Powerful soil booster – 1 cubic foot
All Organic: Horse manure, sphagnum Peat, Brewer's Grain, Gypsum & lime
0.7% 0.45% 1.0%

3.Premier Horticulture – PRO MIX – Growing mix – 1 cubic foot
Compost Enrich (from shrimp, seaweed, softwood bark), Microrise inside, Sphagnum Peat Moss, Peat Humus (OMRI)

4.Nature's Helper – MUSHROOM COMPOST – Organic soil – 1 cubic foot

5.Garden Magic – COMPOST AND MANURE – Peat & Manure – 1 cubic foot
Reed sedge Peat, Manure
0.1% 0.1% 0.1%

6.Ace – COMPOSTED MANURE – Loosens soil – 1 cubic foot
0.5% 0.5% 0.5%

7.New Plant Life – MUSHROOM COMPOST SOIL – Soil amendment - 1 cubic foot

8.Garden Scape – PEAT HUMUS – Decomposed Organic … - 1 cubic foot
A decomposed organic forest peat fiber

9.Garden Scape – COW MANURE – will not burn – 1 cubic foot
1% 1% 1%

10.Organic Valley – HUMUS – ready to use – 1 cubic foot

11.Organic Valley – COW MANURE PLUS ORGANIC COMPOST – Ready to use – 1 cubic foot
0.05% 0.05% 0.05% (USCC)

12.Organic Valley – ORGANIC COMPOST PLUS MANURE – Compost & manure – 1 cubic foot
0.05% 0.05% 0.05%

13.Garick – MOO NURE – Organic Compost with Cow Manure – 1 cubic foot
0.2% 0.2% 0.2% (USCC)

14.Country Stone – COMPOSTED COW MANURE – Soil conditioner – 1 cubic foot
Cow manure, Peat and Humus
0.05% 0.05% 0.05%

15.Earth Gro – ORGANIC HUMUS AND MANURE – Soil amendment – 1 cubic foot
90% organic humus (peat, compost, forest products) and 10% manure
0.05% 0.05% 0.05%

Al

Based on the book 'square foot gardening' by 'mel bartholomew' (www.squarefootgardening.com) MEL's mix is:
1/3 Peat Moss
1/3 Coarse Vermiculite
1/3 Compost (from Various sources)

Whenever I visited a garden store in the search of 'COMPOST'- I Just bought one bag of whatever is available with them. (to ensure various sources)

The boxes are sitting on the ground just on top of weed protector cloth.

Thanks
Ganesh

I think you are doing the best with what you have but are looking to improve, yes?

I would say to look for old leaves from neighbors or landscapers, and a local stable for additional ingredieants for your beds/compost pile.

In my first SFG, I used mushroom, horse, cow and some homemade compost. I firmly believe homemade is the best because you add so many different ingredients. I've added both kangaroo and chicken manure to my compost barrel, along with horse poo (from horses riding down the street).