Choose a Perfect FitBalloon flower (Platycodon grandiflorus) doesn't tolerate heat, humidity or poorly drained soils, so planting in the Deep South or in wet soils is a recipe for failure. Instead, this summer bloomer is a long-lived garden stalwart for USDA Zones 3 to 8, in well-drained soils.
Take CuttingsIf you love the coleus you already have, there's never a need to buy more. Simply take cuttings in the fall, pot up the new plants, keep them indoors by a window for the winter and you'll have plenty of instant color for the garden after the last frost in spring. For more varieties, exchange cuttings with friends, neighbors or garden-club members. Shown here, 'Indian Summer.'
Shrub CuttingsThe method and timing for woody-shrub cuttings depends on the variety. For common flowering quince (Chaenomeles), August is the best time. Softwood cuttings, dipped in rooting hormone, are usually successful.
Pesky CrittersSquirrels won't eat the so-called "tommies" — Crocus tommasinianus — here, 'Ruby Giant.' Get a list of other pest-resistant bulbs.
Replicating BulbsUnlike most tulips, which tend to weaken every succeeding year, some bulbs just keep going, replicating themselves with no effort from the gardener. Plant a few dozen daffodils, and in five years, you're likely to have many more. Get more tips on how to save money on bulbs.
Non-Invasive PlantsCleome, like hollyhocks, cosmos, forget-me-nots and shasta daisies, sow themselves but aren't invasive. Snap a picture of each plant so that, come spring, you'll be able to distinguish the leaves of a "keeper" from a weed.
Lasting a LifetimePlants like scabiosa, wallflower and hardy mums typically last three to five years. Other perennials like blanket flower, columbine and coreopsis are equally short-lived but reseed freely. Still others are long timers; such garden stalwarts include bearded iris, daylily, hellebore, astilbe and bee balm, to name a few. Peonies, above, are extremely enduring, sometimes lasting for more than a century. Get a list of long- and short-lived perennials.
Divide, Then MultiplySome plants like daylilies, bearded iris, yarrow and ornamental grasses need to be divided every few years to reinvigorate them and to reduce overcrowding. What you'll gain for your efforts are new plants to expand your beds and to share with friends.
Watch for FlowersWhen a particular perennial is best divided depends in large part on when they flower. Spring-blooming astilbe can be divided in fall or early spring.
Resting PeriodBearded iris is best divided about two months after it finishes flowering; many gardeners like to divide their irises in August.
Plant PerennialsLate-blooming perennials like helianthus, shown here, are best divided in spring. Filling your beds with a variety of perennials that give successive seasons of bloom, blooming shrubs and colorful conifers means you'll be less apt to load up on trays of annuals to fill holes in the landscape.