When I buy zucchini seedlings, they always come in pots with 3 little zucchini seedlings spaced just a couple of inches apart This is treated as a single plant, but it's really 3 plants. So, when Earthbox says you can plant 2 zucchini plants, does that mean I should plant them as-is, or separate out so I truly have just 2 plants in the Earthbox (rather than 6)? I hope this makes sense! Thanks.