As you’ve probably noticed by now, my raised beds are built of cement blocks with the holes oriented up and down and filled with topsoil. Very few plants actually survive our 50 below winters, so I buy annuals each summer, mostly in 6-packs, and plant them in the holes of the cement blocks.
Some are truly annuals, growing from seed, flowering, seeding and dying in a single season, regardless of climate. Some are in truth biennials or perennials in more clement climates, but are grown as annuals in Alaska.
In general the flowers I choose will keep blooming throughout the summer if they are deadheaded—the flowers cut off after they bloom but before they can form seeds. This keeps the plant thinking it has to keep on blooming to produce seed. (I must admit that this is something I frequently forget to do.)
A few plants are sterile hybrids, and these never need to be deadheaded—they just exist in a constant state of frustration.
Pansies are very popular in Alaska, and they will self-seed.
A sunshine favorite is portulaca, or moss rose. The last week or two have not been kind to these.