We did our first 4' x 4' raised bed this year and followed info on the internet for how many to plant per square foot. Based on the info we found, we ended up putting 2 zucchini in one square foot. I think they may be too close and we probably should have gone with just one plant. One looks ok and the other does not. What should I do with the not good one? Is there any chance of reviving it?