I have zucchini and rhubarb in 16×16 boxes and they never grew fruit/veg. What did I do wrong?

Question

I watered them everyday and gave them “Miracle Grow” once a week for a few weeks but as you can see by the pictures both of them seem to get to a certain point and then die! Help! I’m starting to feel like a urban garden murderer!

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Answer 1

Probably too much water and fertilizer. Here are their cultural requirements:

https://www.gardeningknowhow.com/edible/vegetables/rhubarb/grow-rhubarb.htm

https://www.gardeningknowhow.com/edible/vegetables/zucchini/growing-zucchini.htm