Answer: Your best bet is to plant annuals. If you keep removing the spent flowers, annuals will keep on flowering. Perennials, on the other hand, generally bloom once even if you remove the spent flowers. Any annual that gives you the color such as geraniums, ice plant and zinnias will do well in the spot you decribed. You can mix perennials and annuals and the annuals will produce color when the perennials are done..so pansies and primrose would be a good combination!
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