Tragedy in the backyard

I know it's overly dramatic to call this a tragedy, but I feel like my pet just died.

I had planted many cherry seeds in good soil and 5 of them germinated to give nice seedlings. I was excited and looking forward to grow them, but all of them died. Just like that. No sign of any insects, snails or decease. Just dead :-(

They looked fabulous when they were alive.