Pretty much the main purpose of flowers is bees, though some are worse about it than others and a few are not very bad. You may want to also consider groundcover plants that are more about greenery, though some have annual bloom for a period of time. And saying that you "have no clue where to begin" [planting flowers] is a clue that you might be overwhelmed by having to care for 150' of flower bed. You might want to have a combination of groundcover, perennials and some annuals.

First and foremost you must get rid of any weeds in the bed. Any pieces of live weed roots will resprout and you'll have a weed infestation in no time. You can either dig out any weeds, or spray them with Round-up and plant a week later. As an ongoing maintenance chore, you'll need to remove weeds, at least weekly for a while, or they'll move in and take over. Once the bed is planted, Preen (a pre-emergent herbicide that is applied like shaking salt from a salt shaker) according to the manufacturer's schedule and applied to the finish planted bed, is helpful for keeping new weed seeds from germinating. Annuals, many of which can be raised from seed, is the most colorful and must be replanted yearly. Groundcover and perennials are permanent and come back every year. But they generally don't bloom as long as annuals. Daylilies would be a good perennial to use, especially 'Stella d' Oro' as it is a long blooming variety. It's not too bad on bees. Liriope would be a good perennial if it grows in your area. It comes in green and variegated versions. Petunias would be good annuals to buy as bedding plants. Marigolds are easy to grow from seed. Figure out where you want to place the permanent blocks of plants. Fill in the rest or what you're unsure about with annuals.

Personally, I'd stop being overly concerned about bees. Gardeners are around them for our whole lives and don't get stung. Like our mother said, "don't bother them and they won't bother you."

The narrow 2' of space between pavers and fence is going to limit your plant options. Plus you will need to be diligent about maintaining an edge on the lawn outside the fence to keep the lawn from creeping into your planting bed. Mulch will help a great deal.

No bees, then no flowers for you. Instead think leaf color and texture. I think the smallest ornamental grasses would work well for you with such a long narrow space. Do that as a main feature and then intersperse one or two other textures into the grasses.

Thank you both for the great advice.

I'm looking up ornamental grasses now to see how they grow.

I'd like to do what you said, Yardvaark, I will dig out the grass first along the 2' of area, then maybe use a mix of annuals and perennials to dress it up. I planned to buy the flowers in the pot, not the seeds. Is it too late for seeds? I see people buying palm trees each season -- Can I use a palm tree in the corners just for the summer as decoration? Have you heard of this plastic material that gets placed between the soil and the mulch?

Do you have any recommended preen products to sprinkle in the dirt?

Thanks again!

"Is it too late for seeds?" Not in most places, depending on what one buys. If you're a beginner, start with easy things: marigolds, cosmos and especially zinnias. Transplant them to approximately 12" apart so they have room to grow. Personally, I think there is more joy returned in getting a stand of flowers from seed than there is from bedding plants. And there are much more options about what one can grow. And it's certainly cheaper.

You can use any plant you want for the summer if it will fit.

Hi, you could also try Geranium. They are perennials in zone 9B. I wanted something that the bees don't crazily love for my little front patch near the door so that I don't have to be afraid of bees flying in when I open the door. I eventually choose to opt in a row of Geranium and a row of succulents. 

I read somewhere that bees don't get attracted to the color red (they cannot see them), so if you are really afraid you can try with red Geraniums first. I decided to just opt in all colors : purple, pink, white, red. 

Last year all year I didn't not see much bees (if any) that fly around that area , so I am pretty happy with not being afraid to open my front door :) 

For disclaimer: I know bees are beneficial, myself and my husband are both afraid of bees ( and even worse, hornets, etc.) But I am getting bravier and start planting more bee liking flowers in my back yard vege garden, just pretty far away from my door haha 😊