I wanted to grow brandywine tomatoes this year after reading the memoir $64 Tomato (which is fabulous). I started seeds indoors, but they never came up. I have a horrible track record with starting seeds indoors. They never seem to do that well.
My brother and his wife gave me an oyster mushroom growing kit for Christmas. I followed the instructions, but for whatever reason the mushrooms never came (although the bag blew up and looked completely creepy).
It's okay to have failure. I learn along the way. And I have plenty of other things to plant and grow that I know will likely be successful.
ETA: my brandywine seeds did end up coming up. The mushrooms? Not so much...
Readers, have you had any failures lately?