September is a great time to propagate plants from cuttings, a simple and free way to get more plants for your garden. The new growth from spring and early summer has now matured, reaching a stage that gardeners call “semi-ripe” or “semi-hardwood.” This means the stems are no longer soft and floppy but aren’t yet woody and hard. This specific stage is perfect for taking cuttings because the stems are firm enough to survive the process yet supple enough to easily form new roots.

Taking cuttings in September gives the new plants a good head start. The lingering warmth of the sun and the active growing period allow them to establish a strong root system before the colder weather sets in. This method works especially well for plants like fuchsias, pelargoniums, lavender, and hydrangeas, which are known for rooting easily at this time of year.

Starting new plants in the autumn also lets you protect them over the winter. You can keep them safe in a greenhouse, a cold frame, or on a sunny windowsill. This protection gives them a chance to grow stronger, ensuring they’re ready to be planted out in the garden the following spring. It’s an easy and cost-effective way to multiply your favorite plants and fill out your borders, containers, or even share with others.