University of Minnesota Extension discovers science-based solutions, delivers practical education, and engages Minnesotans to build a better future. © Fall-planted specimens are more subject to frost heaving. You can plant them anywhere if you want colorful blooms at eye-level. Garden phlox (Phlox paniculata) is a hardy, long-lived perennial with a romantic charm. I have five beautiful Garden Phlox plants ranging from five years old to two recently planted this year. And sometimes if you fertilize adequately, phlox may put out an unexpected second smaller flush of blooms. It appears as disfiguring, powdery white spots on the foliage. Diseases. Perhaps that’s because it’s common in wild places throughout the eastern half of the country and beyond. All rights reserved. Deep green leaves are 4-6 inches long with conspicuous veins and are opposite, acute, cuneate, simple, pointed. As you can imagine, this makes it a valued plant among those looking for a continuous sequence of bloom. Phlox paniculata (sometimes called garden phlox or fall phlox) grows 3 to 4 feet tall and is native in Minnesota and most of the North.It comes in a large number of cultivars, though the most famous is probably the white-blooming phlox ‘David’. Tall garden phlox (Phlox paniculata) is an old-fashioned beauty cultivated by generations of gardeners. In much of the country, they will thrive in full sun, although partial shade is fine, as long as the plants receive at least 6 hours of direct sun. Mulch fall-planted phlox with four to six inches of hay or straw, chopped leaves, or pine needles as soon as the soil freezes. Cooperative Extension, which staffs local offices in all 100 counties and with the Eastern Band of Cherokee Indians. The plant, perennial in U.S. Department of Agriculture plant hardiness zones 3 through 8, is an attractive middle-of-the-border plant for full sun that grows from 2 to 3 feet tall and blooms for as long as six weeks from late summer into fall. Tall Phlox Growing anywhere from 10 inches to 4 feet high, tall phlox is a summer bloomer. Good air circulation (adequate spacing and thinning of stems as needed) will help combat powdery mildew. Full sun (6 or more hours of direct sunlight a day), Partial Shade (Direct sunlight only part of the day, 2-6 hours). The veins branch off the center vein then curve toward the tip of the leaf near the edge and connect with the next vein, forming what appears to be a vein along the edge of the leaf. Most tall garden phlox grow two to three feet, with some slightly taller. paniculata. you can mix them too. Most tall garden phlox grow two to three feet, with some slightly taller. Botanical Name: Phlox paniculata 'Rainbow Dancer' Height: 30 - 36 inches Ship As: NO. Not sure if they are all the same variety but some have grown a lot and are blooming while others are not growing much and not blooming. Make sure you get Phlox paniculata because there are other phlox species that, while very lovely, will have different growth habits and growing requirements than what we describe here. Be sure to check that the variety you purchase is mildew resistant since this is a disease that is common to phlox. My garden is fenced. Phlox paniculata is an erect herbaceous perennial that may grow 2 to 4 feet tall and is clump-forming. Mail-order plants might arrive too late in fall to be planted safely. N.C. Will grow up to 24" wide, so be sure to allow enough space in your perennial bed, border or container.Phlox paniculata Space them 18 inches apart to ensure adequate air circulation. For example, one of the tallest phlox, Border phlox (Phlox paniculata "David"), also called Summer phlox, grows up to 6 feet tall. To Georgia, Mississippi, and cutting back to a sideshoot can give a modest re-bloom old-fashioned cultivated! To 4 feet tall and is not always an easy plant to grow well shade! 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