Why is my list of plantings in the nursery empty?

Because it lists what is on your tables today, and nothing is checked as sown yet. Your forecast is already there, in the weekly graph above it.

Current plantings in nursery shows the plantings whose nursery sowing is checked and whose transplant is not. While you plan a season that hasn’t started, it stays empty. When you seed, check Nursery sowing in the planting’s Quick actions, or the task in Tasks, and the planting appears with its container and the space it takes.

More in Keep your nursery up to date.