You can truly take stem cuttings from any houseplant or herbaceous plant (those with non-woody stems) any time during the growing season (spring to late fall). Many root so easily that they will even root in a glass of water. (If you try this, keep the water clean and put the glass out of direct sunlight.
The best time to take softwood cuttings is from mid-spring to early summer. Hardwood cuttings are taken later in the year, from mid-autumn to mid-winter.
Taking winter cuttings from your plants
Most deciduous shrubs are ideal for taking winter cuttings, such as dogwood, flowering currants, roses, honeysuckle, gooseberries and figs. You can also take cuttings from trees such as willow and poplar. You can take cuttings from a few evergreens, including holly and skimmia.
Once the weather gets colder and you have experienced at least one good hard freeze, the deciduous plants should be dormant and will have dropped their leaves, and you can now propagate them. Just make cuttings about 4” long, dip them in a rooting compound and stick them in the bed of sand.
The newer, green growth that lies at the end of the stem will rot before roots are produced, and the older, more woody growth at the base of the stem has a harder time putting out roots. Softwood cuttings can be taken from most deciduous shrubs in June and July and sometimes into early August.
September is a good time to take cuttings of many plants. Some plants, such as half-hardy perennials or tender shrubs, may not make it through the winter, so by taking cuttings you can ensure that you can enjoy them the following year.
September/October is the ideal time to take cuttings from your favourite strains of tender perennials to increase your stock for next spring or to make sure they live on if the parent plants do not survive the winter.
If you would like to keep any half-hardy plants for next year, August is the time to take cuttings. Perennials such as Verbenas, Fuchsias and Pelargoniums are good plants to take cuttings from. Once you have taken the cutting, dip into a hormone rooting compound before inserting them into small pots.
Taking cuttings is a great way to propagate new plants. You can take cuttings at any time of year in a variety of ways, but the easiest (and most successful) method is by taking cuttings of plants' stems in summer.
Hardwood cuttings provide an easy and reliable method of propagating a range of deciduous climbers, trees and shrubs, and as bonus, they are taken from mid-autumn until late winter when more time is usually available to the gardener.
Many of the coleus, geraniums, and some of the begonias that we all love in our pots will also overwinter well as cuttings. It's very difficult to bring the entire pot in, but you can take small cuttings, root them over the winter months, and then next spring plant them out in your containers.
You can propagate with seeds or roots, but the easiest and most common method is by cutting, or transferring a piece of a mature plant into water or soil and letting it grow a new root system.
Propagation for many plants is best done in potting soil, but some plants can be propagated in water. This is because they have evolved in an environment that allows it. Most Aroid plants can be propagated in water, including pothos plants, philodendrons, monsteras, and ZZ plants.
Rooting will generally occur in 3-4 weeks but some plants will take longer. When the roots are 1-2 inches long or longer the cutting is ready to be potted up. This plant has heavy rooting and is ready to be moved to a pot with potting soil.
Warm growing medium temperatures accelerate cell division which leads to faster callusing, root initial development and subsequent root growth. It also speeds up the dry-down rate of the growing medium, which also helps encourage better rooting. The best way to warm the growing medium is through bottom heat.
A common rooting temperature target is 73 to 77° F. To accomplish this, propagators who grow on the floor use in-floor heating, which is usually installed when the greenhouse is built. This is usually an energy-efficient method to increase the root-zone temperature and second- arily, the air temperature.
Many kinds of ornamental plants can be easily rooted from cuttings. The best warm weather months to take cuttings are July through September. Very tender, succulent growth in the spring hasn't hardened enough to live apart from the mother plant.
Can you grow a cutting from any plant? Nearly every plant can be successfully propagated using cuttings, though the exact method will differ from species to species. Some plants are most successfully grown from leaf cuttings, while others do best when grown from roots or hardwood.
(Many plants will root successfully from cuttings without the use of rooting hormone, but using hormone can speed up the process, and it might be essential for some hard-to-propagate plants.) If you are using a powdered hormone, it helps to moisten the stem before rolling it in the powder.
“Grafting, budding, and plant propagation can be done on many types of plants during the winter, not just hardwoods.” High humidity and moisture are important during the post-cut and post-grafting periods.
There are many plants that can be propagated during winter. We often take cuttings during winter as it's a quiet time in the nursery. Most people may assume that it's simply too cold to take cuttings during the winter months, however there are quite a lot of plant species where winter propagation is the perfect time.
You can propagate houseplants at any time of year. This being said, the best time to do it is during their growing season – which is typically spring-summer. They will grow more slowly during the dormant months of autumn-winter.