#1 looks like a very mature Catharanthus roseus
#2 Dracaena... perhaps deremensis 'Janet Craig'
#3 looks like Perilla frutescens
#4 perhaps an Aloe
#5 looks like another Perilla frutescens var. crispa/aka "Japanese red shiso"
All of the above are sensitive to cold/frost to some degree. So, planting in-ground would only be recommended if you don't mind them dying from frost/freeze.