If it is undesirable, resist the temptation to pass it on to somebody else as being preferable to burning or junking it. Not all plants should be sacrosanct. Some are simply menaces. Spring bulbs are coming through the ground now, their summer dormancy well and truly broken. You can still plant them but it is a bit late to try dividing them at this point.
Winter is just around the corner and with it colder, bleaker weather.
Time spent in the garden now dividing, planting and cleaning up will pay dividends in spring. In colder climates, gardeners put their gardens to bed at this time of the year. Everything stops growing, even the lawns. The gardener can retire indoors and contemplate the winter form of their naked garden. No chance here, where we stay lush and green all year and have flowers all year.