Safe bee friendly flowers

Are the annual flowers or any flowers I buy at the garden centers bee friendly? When the bee returns to the hive the nectar is useless , I’ve read but can’t find out what to look for on the plant…

Ground cover on a slope under a deck

We are on the rouge valley with a steep slope and a large elevated deck. What gound cover would survive under the deck on the slope? Rain does get through the deck above, but there is permanent shade from the…