I no longer live in the city & I now have a nice big yard, but I still love my tradition of spring/summer flowers in planters. My mother-in-law taught me how to do this years ago after my husband & I bought our first condominium in the city.
It is a simple & enjoyable process. I block out a window of time to head over to the local nursery & browse all of the beautiful flowers. This year, I already had my planters, so there was no need to purchase anymore of those. All I needed to do was get some fresh potting soil to add to what was left over from last year & decide upon my flowers & plants.
Each year my planters look a little bit different as I learn more about flowers & plants. This year I chose Begonias(very hearty & last me into the fall), Lobelia, Geraniums, Alyssum, Sweet potato vine, 8 a spike plant to go right in the center of it all. I really like the look of a mixture of flowers & plants.
After I have selected my plants & flowers from the nursery, I head home to plant them. I don't like to keep them sitting around for too long. I create a little assembly line. I get the dirt freshened up in the planters first. Then I put a spike plant in the center of each planter. I put the rest of the plants in & then add the flowers all around, give it all a drink of water & they are good to go!
There you have it simple spring/summer flowers...easy enough for someone who is far from having a green thumb!