Hmm, well, the old Greek name for the earth-mother was Gaia (pron. GAH-yah, not GEH-ya - as some immature people would say, "gayer"). So maybe you can do something with that?
Gaia was the mother of all fruits and trees and flowering things.
Maybe... "Gaia's Gifts"? Or, even, "Gaia's Generous Gifts".
Or "Gaia's Gifts Galore"!
Or, if you want something with less alliteration, how about "Gaia's Bounty"? Or "Gaia's Bumper Bounty"?
Oh! *idea* And if you need a symbol to go with it, how about the Horn of Plenty (or in its original Latin name, the Cornucopia - from
Cornu (horn) and
Copiae (abundance, plenty)).
The reason I suggest this is simple: even if someone hasn't heard of Gaia, surely everyone knows what a cornucopia looks like - a horn shaped receptacle, overflowing with fruits, grains, flowers, and/or vegetables. Perfect!
If you want to emphasise the medicinal part of your herbalist shop, you can always go for the classic symbol -
the Rod (or Staff) of Asclepius, the most ancient symbol of the father of medicine. The staff has just one snake, because the ancient Greeks believed in the healing power of snakes (non-venomous, of course!) and dreams. Believers would visit the temple, make a very small donation, and be healed with good food, clean beds, sleep - and snakes on the floor to lull them into a deep, healing sleep.
Please don't confuse the Rod of Asclepius with the
Caduceus or staff with two snakes! Plenty of people have made this mistake, to the point that the Caduceus has now become the symbol of healing, which is a shame. The Two-Snake Staff is the symbol of Hermes, the messenger of the gods - and also god of trade, heraldry, merchants, commerce, roads, sports, travelers, and athletes - as well as the "divine trickster" and "the god of boundaries and the transgression of boundaries ... the patron of herdsmen, thieves, graves, and heralds".
Surely you don't want your shop of healing to be associated with the trickery, thieves and graves, right?
Anyway, sorry for rambling so much about this. The ancient world is my specialty, you know.