Florist

google

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early 17th century: from Latin flos, flor- ‘flower’, on the pattern of French fleuriste or Italian florista .

wiktionary

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From French fleuriste, from Latin floris(“genitive singular of flōs, flower”), +‎ -ist.

etymonline

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florist (n.)

"one who cultivates flowers," especially "one who raises flowers for sale," 1620s, formed on analogy of French fleuriste, from Latin floris, genitive of flos "flower" (from PIE root *bhel- (3) "to thrive, bloom") + -ist. Related: Floristry.