Growing in the garden--but I didn't plant it. Moved it to a planter.
I agree w/growin... looks like Euphorbia 'Diamond Frost'. The lack of showy flowers at this time may be due to new growth resprouting from the roots after a mild winter in your area... or perhaps it's a seedling that is not true to the original cultivar.
Diana, can you click the picture to enlarge it to see the flowers? Or "zoom" from your computer or smart phone?
THANKS to folks that provided a "perhaps" answer.