lookforkim.
White petunias
Nicotiana
Stocks
Alocasia macrorhiza 'Variegata'
Datura: white
Snapdragons: white
Euphorbia heterophylla 'Yokoi's White'
LANTANA CAMARA WHITE DWARF
Lantana camara 'White Dwarf'
There are a bunch, depending on container size, sun or shade, annual or perennial, and growing zone.
I love moon gardens, but have never created one.