waves of delicate snow-white sutera, trailing white petunias, calibrachoa &#x27;Million Bells Trailing Blue&#x27;, flossy-topped periwinkle-blue ageratum, lavender-flowered verbena, and variegated vinca vine are effervescent partners for classic white and pink geraniums.  Window-Box Basics  By: Marjorie Gage, This Old House online