And a trade war clogging up phosphate shipping (I don't know if it happened, but the timing was right and that's a major route) definitely helped. I recommend everyone learn to grow their own food. I have a good guidebook if you've got like half an acre and enough room to dig furrows (G, author of the guidebook, insisted that was how to do it and he grew the best watermelons I ever et. Size of my thigh. Been gone a couple decades and I've still been looking for watermelons that delicious) between the rows.
If you have a patio/balcony for your outdoor space instead of a yard, square foot gardening is the way to go.