In Chicago, our springtime temperatures can be quite varied. In 2011, Chicagoland temperatures have been extremely cold. I decided last weekend to remove my winter display and begin planting a spring time window box.
I am fortunate to obtain excellent quality plants at our local Home Depot. This year I picked up tulips, daffodils, pansies, hyacinths, and snow drops. All of the plants were just coming through the ground so that my display will last much longer and I can watch them grow. Here are a couple of my tips for creating an amazing display.
1) I removed ½ of the soil that was still in the container. I was amazed this year that soil had frozen clumps. Usually by April 1st, the soil is much easier to work with.
2) Use a high quality soil. I prefer moisture control.
3) Over plant the window box. I only keep the Spring Time box for 6 weeks. In Chicago, the last day we can have a frost is by May 15th. I begin my summer planting by then.
4) Remember to fertilize. I use bloomer mix especially for the pansies.
5) Dead your flowers often. This will additional flowers to grow during this short season.
I am looking forward to working on my rooftop garden and will keep you informed about the progress that is being made. Happy Spring!