I have made no secret of my disappointing past results with my windowbox flowers. This year, that is all going to change.
My new winning ways began with major soil rehabilitation. I removed half of the windowbox soil and replaced it with a mixture of 2 parts new garden soil, 1 part composted manure, and a healthy dash of Soil Moist water retention additive. This improved soil should have the nutrients the plants need to thrive and do a better job of keeping the plants’ feet wet instead of baking to crisp inside the brick planter in the direct morning sun.
The plants I picked for the windowbox are also proven winners. Sweet potato vine, nasturtiums, and lantana were all recommended by a master gardener friend as plants that not only look great in a windowbox but are also drought- and heat-tolerant. Both the potato vine and nasturtium are trailing forms that should look really great when they get big enough to spill over the side of the planter.