green alkanet / foxglove / comfrey / borage / salvia sclarea

All these (green alkanet / foxglove / comfrey / borage / salvia sclarea ) have similar textured leaves and at times can be difficult to tell apart. I have all these in my garden so I recently took photos of each for comparison.

green alkanet, smaller leaves below are nepeta

foxglove

sometimes the leaves are very textured

often have that lighter colour in the middle

comfrey, leaves longer and thinner with a distinctive pattern

the comfrey 10 days later

borage (Borago officinalis)

clary sage cultivar (Salvia sclarea var tukestanica)