Its pretty much of a cinch to
keep window boxes looking lush all summer when there are so many fabulous flowers to
choose from. But what happens when the geraniums give up the ghost and the petunias turn
puny? Theres no need to throw in the trowel. With a little imagination and a bit of
plant know-how you can create eye-catching window boxes that will last through autumn, the
holiday season and beyond.
A Fresh Start for fall.
The area of the country where you live determines when window
boxes change from things of beauty to eyesores. For some it may be early September, for
others, late October. As soon as your summer display starts to look straggly, its
time to give your pooped out plants the heave-ho. I know it isnt easy to be ruthless
when theres the promise of a few more blooms. Still, experience has taught me that
there is no miraculous recovery in store for a worn out window box.
After youve pulled out the summer crop, check to see if the
soil has become dry and caked or full of clumps. It is often a good idea to shovel out the
contents and start fresh with a new bag of lightweight potting soil. Youll want to
mix in a bit of perlite to help the soil retain water. When the box is clean and ready to
be replanted, start by sprinkling in a couple of inches of the mix on the bottom of the
box. Once youve selected and positioned the plants youll keep adding soil
until the box is full.
Cool Choices for Autumn Displays.
Chances are, dwarf juniper did not spring to mind when
considering plants for a cool weather window box. The fact is there is a wide selection of
hardy evergreens with interesting shapes and foliage that are ideal for winter displays.
Holly, cypress, spruce, pine, privet, boxwood and ivy are just a few that can brighten a
design without demanding a great deal of maintenance. Since many of these plants are slow
growers, you may be able rotate them from the window box to another section of the garden,
then back to the window box for several years. An occasional trim will keep the little
shrubs looking tidy.
One eye-appealing grouping Ive seen combines boxwood,
heathers and ivy. Start with a row of dwarf boxwood along the rear of the planter, then
place several pink and white Scotch heathers across the center. To soften the edges, allow
trailing ivy to cascade over the front of the box.
Flowering kale (Brassica oleracea acephala "Northern
Lights) and pink or white English ivy make another pleasing combination. For
additional splashes of color tuck in a pansy here and there. Perennial herbs are also
excellent candidates to incorporate into a cool weather box. Lavender, germander, oregano,
mint, lemon balm, chives and thyme are hardy to zones four or five. They look
greatand you have the added pleasure of opening your window and harvesting fresh
herbs whenever you need them.
The more the merrier.
While visiting France a few years ago I saw some absolutely
amazing window boxes. It seemed that every window in every village was alive with color
and blooms. I wondered how gardeners there were able to achieve such dramatic displays. In
taking with villagers I learned that they incorporate more plants into their window boxes
than we generally do. Where we might use five specimens in a planter, they cram in
More definitely works better.
Another European beauty secret I discovered is that they
fertilize more often than the product label suggests. That practice might be okay for
spring and summer boxes, but the result could be deadly for
plants heading into cooler weather. One dose of a good plant
fertilizer should get your autumn box off to a good start. Ask your Growise expert for a
The instant window box.
If you dont have time to round up small evergreens and cool
weather annuals, try my lazy gardeners solution: stick fir or pine branches and
berry-laden holly into the soil. Replace branches as they dry out. It may not rival the
best of France, but it sure beats looking at an empty window box all winter.