3 inches apart in ever direction if it is bush variety

I grow strike in double rows 8 inches apart at 1 one inch spacing. 2 feet between the double rows.
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I plant 3" in every direction because i plant in raised beds and like to maximize my growing space.. Whether its 20-30" tall varieties or small bush types like progress #9. The peas produce wonderfully when planted so close together. The only pitfall is that you should be diligent in picking them because many will be hidden.

Thanks guys. I went ahead and spaced them slightly more them the package instructions. And did a full 2 ft wide row.