Herb
Cool, invasive, unkillable — prosperity for anyone who can keep it in its pot.
These are associations the community holds, not settled fact — the more a reading is shared, the bolder it sits.
Mint is a genus that hybridises so readily that botanists have spent centuries disagreeing about it; peppermint itself is a cross, and most garden mints are of uncertain parentage. The Greek story gives it a nymph, Minthe, turned into a plant by a jealous Persephone and given her sweet smell as a consolation, which is a very Greek sort of consolation.
It has been strewn on floors, rubbed on tables before guests arrived, and hung in dairies and store rooms for a smell of cleanliness. Craft use runs to prosperity, hospitality and clearing: a mint leaf in the purse, mint in a floor wash, mint at the door for welcome. The prosperity association is largely modern and largely American, but the cleaning and welcome uses are old and continental.
Its practical virtue is that it grows with alarming enthusiasm. Plant it in open ground and you have made a decision on behalf of everyone who gardens after you. Anyone who wants a plant that demonstrates abundance without being asked twice has found it.
Readings practitioners have offered, ordered by how many recognise them. Take what serves, leave the rest.
Carried forward
Nicholas Culpeper, The Complete Herbal (1653)
Culpeper gives garden mint to Venus and then produces one of his longest lists in the whole book — some forty uses, from stopping hiccups to keeping milk from curdling. It is a good illustration of how a genuinely useful plant collects claims.
Carried forward
Common in contemporary practice
A leaf kept in the purse or pressed into a candle for prosperity. The association is recent and mostly American; the older European use was for welcome, hospitality and a clean-smelling room.
Credit what you carry. Much of this comes from living traditions, and some of it from traditions that are closed — held by particular peoples and not offered for general use. Where you know whose practice a reading came from, name them; where you don't, say that too.