Divide and Transplant These 15 Perennials in September

September is the ideal calendar month to give your garden a fresh start by dividing and transplanting some of your dear perennials . As the weather cool down and the soil remains tender , plants are less punctuate by the process , making this the everlasting time to regenerate your garden . I ’ve always notice it incredibly satisfying to divide overgrown perennial — giving them more room to thrive and creating raw plant to fill up in other region of the garden or divvy up with friend . Whether you ’re looking to operate the size of it of your plants , improve their health , or simply want to mix things up in your garden , September is the sentence to do it .

Dividing and transplanting perennials not only revitalizes your garden but also ensure that your plants continue to flourish yr after year . Some plants naturally spread and become crowd together , which can extend to reduced blooming or even the development of disease . By separate these plants , you ’re giving them a right chance to thrive , and in turn , they ’ll honour you with more vibrant growth and peak . Plus , this process can help prevent strong-growing perennial from becoming invasive , spreading beyond their intended domain and taking over your garden . Let ’s plunk into the details of dividing and transplanting 15 popular perennial that will gain from a little TLC this September !

Daylilies (Hemerocallis)

daylily are among the easy and most rewarding perennials to divide . Native to Asia , these hardy plants are beloved for their vibrant , trumpet - shaped flowers that blossom copiously throughout the summertime . However , if you ’ve observe your daylily producing fewer peak or the clumps becoming overcrowded , it ’s a clear signboard they need to be divided . I ’ve found that dividing daylilies every three to five years not only improves their blooming but also allow you to spread their cheerful presence throughout the garden .

When dividing daylilies , start by dig up the entire ball , taking care to fend off damaging the root . Gently separate the thud into smaller section , ensuring that each section has at least three intelligent fans of leave . Replant the sectionalisation in a sunny spot with well - drained grease , and water them exhaustively to help them establish . Daylilies are unbelievably resilient , make them a perfect option for gardeners face to expand their collection without too much fuss . And do n’t worry — these plants are not invading , so you may feel free to share the extras with champion or practice them to fill in empty maculation in your garden .

Hostas (Hosta spp.)

Hostas are a shade garden basic , know for their riotous foliage and rest of care . Native to Northeast Asia , particularly Japan , Korea , and China , hostas prosper in cool climate and add a touch of elegance to shady areas . If your hostas have become crowded or their centers have start to pall out , it ’s fourth dimension to divide them . Dividing hostas not only revitalize the plants but also prevents them from becoming overly dense , which can lead to disease or cuss problems . I always wait forward to this task in September — it ’s like dedicate your garden a fresh new look !

To divide hostas , dig out up the intact clump , shit sure to lift it from beneath to avert damaging the solution . Once the clump is out of the ground , you’re able to use a tart knife or spade to cut it into smaller subdivision , see each has a healthy portion of ascendent and at least a few eyes or growth peak . Replant the divisions in a well - drain , shadowed fix , and irrigate them good . Hostas are not invading , but they can spread over metre , so be mindful of their placement if you ’re working with a little garden . These sturdy plants will bounce back quick and reward you with lush foliation for years to come .

Bearded Iris (Iris germanica)

Bearded fleur-de-lis are sensational perennials that lend a fit of color to the garden in late spring and early summertime . aboriginal to the Mediterranean part , these industrial plant are cherished for their intricate , rippled blooms and blade - same foliage . However , bearded irises can become overcrowded , leading to fewer flowers and an increased risk of disease . I ’ve find that dividing bearded irises every three to four old age help maintain their vigor and assure a spectacular video display of blooms each season .

To divide bearded irises , wait until after they ’ve polish off blooming and their leaves have commence to die back . Carefully dig up the rhizome ( the thick , horizontal stems ) and use a penetrating knife to cut them into section , ready sure each piece has a healthy fan of leaves and a lot of the rhizome . Discard any cushy , morbid , or old rootstock , and replant the sound divisions in a sunny , well - debilitate position . Space them about 12 to 18 inches apart to give them way to grow . Bearded irises are not invasive , but they do open over time , so steady section will aid keep them in check and ensure they proceed to blossom attractively .

Sedum (Sedum spp.)

sedum , also known as stonecrop , are versatile and hardy perennials that boom in a sort of shape . Native to Europe and Asia , these succulent - like plant are drought - tolerant and stark for adding grain to rock gardens , borders , or containers . If your sedums have become overcrowded or are flopping over , it ’s a good reading that they necessitate to be divided . I eff work with sedum because they ’re so easy to care for , and dividing them in September assist keep their growth thick and their flowering consistent .

When dividing sedums , mildly lift the clump out of the basis and habituate a crisp knife or spade to cut it into smaller section . Each partitioning should have a healthy portion of solution and stems . Replant the divisions in a sunny spot with well - drained soil , space them about 12 to 18 inches aside . Sedums are not invasive , but they can spread over time , so even section help manage their size and ensures they keep to flourish . With a small attention in September , your sedums will honour you with beautiful , late - season blooms and foliage that looks great even into the winter .

Peonies (Paeonia spp.)

Peonies are classic garden ducky , known for their lush , fragrant flush and long lifespan . aboriginal to Asia , Europe , and Western North America , paeony are perennials that can thrive for decades with minimal care . However , if your peonies have stopped blooming as prolifically or if the clumps have become too large , it might be time to split them . divide peonies in September gives them great deal of prison term to give their root before wintertime , ensuring they ’ll be ready to burst into bloom next spring .

To divide peony , carefully dig up the entire clunk , being sure to go wide and deep to avoid damage the roots . Gently sway off the soil and apply a acute knife to separate the clunk into humble sections , each with at least three to five optic ( the buds where new maturation will issue ) . Replant the division at the same depth they were turn before , making sure the eyes are no more than 1 to 2 inches below the dirt surface . Peonies are not considered invasive , but they do appreciate some distance , so give them room to grow and spread out . With proper concern , these divisions will expand and cover to add joyousness to your garden for years to come .

Phlox (Phlox paniculata)

Phlox is a wizardly perennial that adds a salvo of color to your garden in mid to late summertime . Native to North America , these flora are known for their marvelous , fragrant flower clusters that attract butterflies and hummingbird . However , over time , phlox can become overcrowded , leading to few blooms and increased susceptibility to powdery mildew . divide phlox every three to four years help maintain its wellness and insure a more robust display of flowers . I always make time for this task in September — it ’s a great way of life to keep the garden looking reinvigorated and vivacious !

When dividing phlox , labor up the ball cautiously , using a spade or garden fork . Shake off the excess stain and utilise a sharp knife to split the clump into diminished section , each with a healthy portion of roots and stems . Replant the division in a cheery , well - drain spot , space them about 18 inches aside to allow for air circulation . Phlox is not invasive , but it does disperse , so steady division help keep it under control . After dividing , water system the works well and mulch around them to help keep back wet and suppress weeds . With a little care , your phlox will continue to lighten your garden for many time of year to come .

Yarrow (Achillea millefolium)

Yarrow is a unfearing perennial that ’s a favorite in many garden for its feathery foliage and clusters of small , bland - crown flower . aboriginal to Europe and Asia , Achillea millefolium is improbably drouth - patient of and thrives in full sunlight , make it a perfect choice for low - maintenance garden . However , Achillea millefolium can spread sharply if left unchecked , so dividing it every two to three years is crucial for keeping it under ascendency . I ’ve always revalue how well-off yarrow is to exercise with — dividing and transplanting it is a breeze , and it apace settle into its novel location .

To separate yarrow , dig up the clustering and use a penetrating tongue or spade to bring down it into smaller sections , each with a good portion of roots and stems . Replant the divisions in a sunny smudge with well - drain soil , spacing them about 12 to 18 inches aside . Yarrow ’s mystifying root make it particularly resilient , and once established , it will thrive with minimum concern . While Achillea millefolium is not considered invasive , it can be quite vigorous , so even class aid manage its spread and preserve your garden looking neat . Plus , yarrow ’s flowers attract beneficial insect like bee and butterflies , piss it a worthful summation to any garden .

Black-Eyed Susan (Rudbeckia hirta)

opprobrious - eyed Susan is a quintessential late - summertime bloomer , known for its bright yellow petals and dismal brown centers . aboriginal to North America , these intrepid perennials are a front-runner for attracting pollinators , including bees , butterflies , and even birds that bung on their come . If your fatal - eyed Susans have start out to form obtuse clumps or if their blooming has decreased , it ’s sentence to divide them . September is an ideal time for this chore , as the cooler weather gives the flora a fortune to establish themselves before winter .

To separate black - eyed Susan , dig up the ball carefully and use a spade or knife to separate it into smaller surgical incision , each with a goodish portion of solution and stems . Replant the divisions in a cheery smear with well - drained soil , spacing them about 18 to 24 column inch aside . dim - eyed Susan can be somewhat aggressive , spreading rapidly if not wangle , so even class is key to keeping it under control . With a little care this month , your black - eyed Susans will proceed to brighten your garden with their cheerful bloom of youth for many season to number .

Coreopsis (Coreopsis spp.)

tickweed , also known as tickweed , is a delicious perennial that brings a plash of shining color to the garden from summer into autumn . Native to North America , coreopsis is prized for its daisy - like flowers and its power to thrive in poor soil conditions . However , coreopsis can become long-legged or overcrowded if not divided every few years . I incur that September is the perfect metre to divide coreopsis — giving it a fresh start and guarantee a more prolific bloom next season .

When separate coreopsis , dig out up the entire thump and utilise a shrewd tongue to sort it into smaller part , each with a good helping of roots and several stems . Replant the divisions in a sunny spot with well - drained soil , spacing them about 12 to 18 inches apart . tickseed is not invasive , but it does spread readily , so regular segmentation help carry off its growth and observe your garden depend tidy . After replanting , water the plants exhaustively and mulch around them to serve retain moisture . With right care , your tickseed will continue to bring joy to your garden with its cheerful , long - lasting bloom .

Shasta Daisy (Leucanthemum × superbum)

Shasta daisy are a garden classic , known for their cheerful white flower petal and sunny yellow centre . aboriginal to Europe , these perennial are loved for their prospicient blooming season and power to attract pollinators like bees and butterfly . If your Shasta daisies have become overcrowded or their centers are set off to die out , it ’s time to separate them . September is an ideal fourth dimension for this , as the ice chest temperatures and still - affectionate soil ply the perfect condition for the divisions to establish .

To split up Shasta daisies , cautiously dig up the clump and utilize a sharp knife or spade to sort out it into small sections , each with a healthy helping of roots and stems . Replant the division in a sunny spot with well - drained soil , spacing them about 18 inches aside . Shasta daisy are not invasive , but they can distribute over time , so regular division help keep them in check . After replanting , body of water the divisions well and apply mulch to help retain wet . With a little concern , your Shasta daisies will go along to institute a touch of classic lulu to your garden for years to come .

Lamb’s Ear (Stachys byzantine)

Lamb ’s ear is a charming perennial known for its soft , velvety foliage that adds a unparalleled texture to any garden . Native to the Middle East , particularly Turkey and Armenia , lamb ’s ear is incredibly drought - kind and thrives in full sun . Over metre , this flora can spread and become quite dense , making it a candidate for partition every few years . I always incur that fraction lamb ’s spike in September gives the garden a smart look and ensures that the plant remains healthy and vigorous .

To divide lamb ’s ear , dig up the clustering cautiously and use a astute tongue to divide it into pocket-size sections , each with a good portion of source and foliage . Replant the divisions in a gay , well - drained spot , spacing them about 12 to 18 in asunder . Lamb ’s ear is not consider invasive , but it can spread rapidly , so even division is significant to keep it from take up over . After replanting , water the division well and mulch around them to help retain wet . With a fiddling attention , lamb ’s ear will retain to add its unique charm to your garden for many seasons to come .

Japanese Anemone (Anemone hupehensis)

Japanese anemones are elegant perennials that bloom in recent summertime and fall , get a touch of free grace to the garden when many other plants have finished their show . Native to China and naturalized in Japan , these plants produce finespun , cupful - shape flowers on tall staunch that sway graciously in the breeze . However , Nipponese anemones can become overcrowded and spread aggressively , defecate steady division indispensable . I ’ve found that September is the gross time to divide them , as the cooler weather provide them to found before winter .

To part Japanese sea anemone , get the picture up the clump carefully , being mindful of their fibrous roots , and use a sharp tongue to separate it into smaller section . Each part should have a respectable constituent of roots and several stems . Replant the divisions in a partially shaded spot with well - drained filth , space them about 18 to 24 inches asunder . Japanese windflower are known to pass around , so even air division helps keep them in hinderance and ensure they do n’t sweep over your garden . With a petty fear , these graceful plants will continue to enhance your garden with their late - season stunner .

Astilbe (Astilbe spp.)

Astilbes are shade - loving perennials that lend a splashing of color to the garden with their feathery plumage of flowers . aboriginal to Asia and North America , astilbe boom in moist , well - drained land and are stark for brightening up shady spots . If your astilbes have become crowded or are blossom less than usual , it ’s prison term to part them . September is the idealistic time for this , as the cooler temperatures leave the divisions to show without the stress of summer heat .

To divide astilbe , dig up the entire thumping and practice a abrupt knife to separate it into smaller sections , each with a good portion of roots and several fore . Replant the divisions in a shady or partially shaded touch with rich , well - drained soil , spacing them about 12 to 18 inches apart . astilbe are not invading , but they do spread over time , so regular division helps manage their size and see to it they stay to bloom profusely . After replanting , urine the division well and mulch around them to help hold moisture . With proper care , your astilbes will continue to add their endearing plumes to your garden year after twelvemonth .

Purple Coneflower (Echinacea purpurea)

Purple coneflowers are beloved for their daisy - like flowers with striking , strobile - mold plaza that pull a wide range of pollinators , including bees , butterfly , and even fowl in the drop . Native to the central and southeastern United States , these hardy perennials are gentle to grow and thrive in full sun . If your coneflowers have become overcrowded or their blooming has decreased , it ’s time to divide them . I always see that September is the perfect metre for this undertaking , as the cool weather condition aid the plant recover promptly .

To divide purple coneflowers , dig up the clump cautiously and use a sharp knife or spade to separate it into lowly sections , each with a healthy portion of roots and stems . Replant the sectionalisation in a sunny spot with well - enfeeble dirt , space them about 18 to 24 inches apart . Purple coneflower are not regard invasive , but they do go around , so regular division helps keep them in cheque . After replanting , water the naval division well and mulch around them to help retain moisture . With right maintenance , your purple coneflower will continue to bring their vivacious color and pollinator - friendly blooms to your garden for many seasons to fare .

Siberian Iris (Iris sibirica)

Siberian iris is a refined perennial make out for its svelte , arch foliage and touchy , butterfly - like flowers that blossom in late give to other summertime . aboriginal to northerly Asia and Europe , this iris thrives in moist , well - drained soil and adds a touch of elegance to any garden . However , Siberian iris can become overcrowded over time , leading to decreased bloom and weaker growth . divide the lump every three to four years help hold their wellness and ensures a striking display of flowers .

To divide Siberian sword lily , hollow up the entire clustering and use a sharp knife or spade to separate it into smaller section , each with a intelligent portion of roots and several lover of leaves . Replant the divisions in a sunny or partially shaded office with rich , well - enfeeble grunge , spacing them about 12 to 18 inches apart . Siberian iris is not encroaching , but it does spread , so unconstipated division helps keep it under control and see it continues to blossom beautifully . After replanting , water the divisions well and put on mulch to help retain wet . With proper care , your Siberian sword lily will extend to bring their elegant beauty to your garden for years to come .