Having a handful of issues with SP, myself. Planted 5. 4 sprouted. I am certain the no-show was not a floater.
1 rotted/died at about an inch above coco. 1 is a mutant but may be growing out of it. The runt looks lazy. The champ is slower than I am used to but still coming along. All plants are otherwise nutrient healthy looking. That is, nothing but green in the leaves.
Y'all'll see at Thursday's thread.