Meaning

verb plant in a pot

adjective of plants; planted or grown in a pot

adjective preserved in a pot or can or jar

originFrom pot + -ed. Adjective meaning "prepared in advance" by analogy with potted meat (canned meat), first used in a published work by L. Susan Stebbing in her Pelican classic Thinking to some purpose (1939), where "potted thinking" is defined as "a compressed statement to save us the trouble of thinking".

Etymology from Wiktionary, CC BY-SA 3.0