How to PropagateAsterPlants by Cuttings. Some aster varieties, such as Frikart’s aster, can be propagated by taking softwood cuttings. Learn how to care for asters (Symphyotrichum spp.) in order to benefit from their beautiful display of daisy-like blue, purple, and white flowers. Asters rejuvenate late-season gardens with daisy-like flowers. Read on to discover how easy it is to propagate your own asterplants now on Gardener’s Path. Discover Pinterest’s best ideas and inspiration for Asterpropagation tips.Read on to discover how easy it is to propagate your own asterplants now on Gardener’s Path. How to PropagateAster. Propagatingasters is easiest through cuttings and divisions. While these flowers can self-sow, many are cultivars, so seedlings might not match the parent plant. Plantingasters. Sarah Cuttle.Asters can also be propagated by division. Usually after around three years, the clumps are large enough to divide. Where, When, & How to PlantAster. Planting & PropagatingAster. Propogate Aster from Seeds. PropagateAsterPlant by Division. Propagation. There are several ways to propagateasters, each producing relatively reliable results. For those who want full control of the growing process, start by growing from seed. Digging up an established aster and dividing it into smaller clumps will maintain the health and vigour of the plant, this is also the best way to propagate cultivars as all the new clumps will be... Propagating new Asterplants can be achieved by eitherPlace on a warm window sill or in a propagator as Aster seeds need a temperature of 15-21°C to germinate reliably. How to PropagateAsters. Asters rejuvenate late-season gardens with daisy-like flowers. Read on to discover how easy it is to propagate your own asterplants now on Gardener’s Path. AsterPropagation. Asters can be propagated by dividing existing clumps or grown from seed sown indoors at about 70° F. Perennial asters can grow on one site for up to five years, so autumn is the time to dig out and plant out perennial asters that have turned 5 years old, especially if they are propagated by... Propagating Purple Aster. Asters can be propagated from seed, cutting, or division. Plants grown from seed take a long time to reach a sizeable, flowering plant.