Yesterday I bought a Euphorbia milii (Crown of Thorn) in a 6" pot from my local Home Depot. At the store it never received full sun.
I know that this plant thrives with direct sun, so I'll be moving it to my rooftop, and it'll receive 90+-degree heat and many hours of direct sun.
My question: should I just move it to the rooftop now or should I leave it downstairs a few days so it gets used to the change in environment? I ask because yesterday it was at a store in shade and now it'll be in Death Valley.
Also, when should I move it to a bigger pot?