It is a type of hardy sedum, Hylotelephium spectabile, like Autumn Joy. But there are scads of different cultivars on the market with various foliage and flower colors. They are all tough, adaptable and durable plants and make great garden accents. Most tend to bloom late summer and well into fall. And they can be easily divided. ETA: just noticed this was posted in Gardening for Shade. Hardy sedums are best in as much sun as available and upright ones - like in the photo - will have less of a tendency to flop or splay if grown in as much sun as possible.

It looks like a heath or heather, but I'm not sure which variety.

Hi! If you can identify any of these two plants that I recently adopted please comment below. Thank you :)

Seedlings are variable. If you are looking for certain shades of cape plumbago, the most common ones available in CA are generally 'Imperial Blue' --which is-darker than many of the often rather pale seedlings, but lighter than the deeper blue 'Royal Cape'. There is also a white, 'Alba'. These plants are rather vigorous once established, generally mounding in shape when left natural, and can get rather large (7-8' tall, 8-10' wide). They can be kept smaller with heavy pruning, or even be hedged (at the expense of some flowers, but they aren't shy about blooming).