Taking daisy cuttings. Divide tender plants in late-spring, when the soil is warm. It’s easy to divide. From early September right through until early May will be fine to propagate and/or move them. It would be silly to divide in full Summer but if you are desperate and moving house just cut back the top and move them! Pruning and deadheading: Aim to take some cuttings when the new growth is three inches in length. Dividing hellebore plants is not necessary, but it can enhance flowering in older plants. Members of the daisy family can also be raised from basal cuttings taken from the new growth. This variety of phlox will set seeds, which produce seedlings that rarely resemble the parent plant. Agapanthus, kniphophia and alstroemeria come into this category. When to divide perennials. Phlox are very easily propagated by simple division. species that form ground covers rewards gardeners with numerous plants that can populate other areas in the garden Dividing phlox also … Plants can be divided successfully at almost any time if they are kept well-watered afterwards. My first time growing Phlox. Division is not only a great way to propagate hellebores that have become old, but you can also easily repot the numerous babies the plant readily produces each year. Phlox has always sounded such a funny name to me – like a group of sheep – but it is a plant which offers far more colour and is a darned sight easier to look after. Trim out the old flower heads once most of the blossoms on the cluster have wilted immediately after blooming. When the phlox flower gets faded, then cut it immediately, it will encourage new development, and the flowers will be more. Learn more here. Best offers for your Garden - https://amzn.to/2InnD0w-----How to Propagate Phlox. Has your moss phlox spread too far? I have one unnamed that is pink and quite a bit taller than 'David'. If you have garden phlox long, then after the first Killing Frost, cut the stem from the soil surface above1 to 2 inches. However, division is most successful when the plants are not in active growth. Tall phlox varieties produce their flowers in clusters atop long stems for a period of six weeks in early to midsummer. The Phlox genus encompasses nearly 70 species, and includes annuals, perennials and shrubs. Divide summer-flowering plants in spring (Mar-May) or autumn (Sep-Nov) when the soil is dry enough to work. With a sharp spade, just chop and replant, perhaps a little deeper than before. Will do. Divide tall plants to reduce illnesses and problems, it also increases the power of the plant. My main question is how will I know when to divide David? Dovefromabove Central Norfolk UK Posts: 62,934. Most of the perennial varieties are upright, but a few species are mat forming. Dividing phlox (Phlox spp.) Keep well watered. In wet autumns, delay until spring. I understand from reading posts here that I should pinch it early to get sturdier stems as it gets floppy and has to be staked. Dividing: To prevent overcrowding and improve the vigor of your plants, divide them every 3 to 4 years. Telltale signs that phlox is ready for division include sparser blooming and centers that begin to weaken or die out. ... Never tried dividing Phlox subulata or P. douglasii, the alpine ones, but never needed to, they root as they go so all you need to do is take rooted stems and pot them up. Spread the foliage apart and cut through the roots along the dividing line, which you can see in the top photo at left, making sure all the roots on the division are severed from the main plant.