David explains the difference between these three different varieties in the Bumble series of perennial Salvias. All are shorter and more compact than most of the regular Meadow Sages. They are very free flowering and will re-flower 2 or 3 times if sheared back as the old flowers fade. The leaves have a strong aromatic scent that means they are NOT favored by deer.
More at: https://www.grownbyoverdevest.com/plant-database/?swoof=1&pa_genus=salvia
Mote at: https://www.handpickedplants.com/
'Bumbleberry' grows to about 10-12" and has violet pink flowers.
'Bumbleblue' grows to about 12-14" and has deep, violet blue flowers.
'Bumblesky' is the tallest of the group and gets to about 16" tall and has pale lilac-blue flowers.