Herbaceous cuttings can be taken throughout the growing season (spring to late fall), while softwood cuttings should be taken in spring or early summer. Cuttings can be taken as long as the parent plant is healthy and in active growth.
Preparing cuttings
The plant material should be semi-mature, i.e. semi-hardwood. The best time, therefore, to take cuttings is late spring or early summer. Cuttings taken at other times will often root but may take much longer, although there are many exceptions.
Most stem cuttings can be rooted anytime the plants are actively growing. Coleus and geranium, for example, grow year-round (except where winters are freezing). Take cuttings from these annuals whenever you want to make more of them.
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.
Hardwood cutting are taken in the dormant season (mid-autumn until late winter) after leaf fall, avoiding periods of severe frost. The ideal time is just after leaf fall or just before bud-burst in spring. Although this type of cutting may be slow to develop roots and shoots, it is usually successful.
September is the ideal time to take cuttings of many tender plants, including penstemon and pelargonium. Find out more in our practical guide. September is a good time to take cuttings of many plants.
“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.
Root cuttings are best taken in mid-to-late autumn or early winter when plants are dormant.
A perennial with an insect or disease problem should always be pruned in fall, no matter the type. Trim and discard of any infected plant stems to stop an infestation from carrying over into next year's growing season.
Plant patents
Translation: you cannot divide that overgrown perennial, root cuttings, or layer branches if the plant is protected by a plant patent. Basically, the only legal way to reproduce a plant with this type of patent is by seed.
Some plants like papaya, marigold, chilli, capsicum, tomato, etc., cannot be propagated by asexual method. It is the only means of creating genetic diversity of plants. New varieties and cultivars of ornamental and vegetable crops can be developed only by this method.
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.
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.
Technically, you can transfer your cuttings to soil at any time. In fact, you can actually propagate directly into soil, however, it's much harder to do within your home. When you propagate in soil, you have to keep a good balance of soil moisture, air flow, and humidity.
Give cuttings bright light but not sun. Keep soil moist but not wet. The cuttings should root within three weeks. Admit air gradually to wean the cuttings from their humid environment, then pot singly before outdoor planting.
Cuttings from many annual plants will keep over winter, sprout roots, and be ready for planting in spring. You may place them in pots or cups without drainage filled with moist perlite or vermiculite. Locate them at first in bright light, away from the sun.
As you are conducting a winter dormancy pruning, have you ever wondered “Can you propagate plants in winter?” Yes, winter propagating is possible. Normally, the cuttings would go in the compost pile or yard waste bin, but try propagating plants in winter from the cuttings.
Most deciduous shrubs are ideal for taking winter cuttings, such as dogwood, flowering currants, roses, honeysuckle, gooseberries and figs.
From early fall through most of November is one of the best times of year to plant spring-blooming bulbs, cool-season annuals and vegetables, as well as many trees, shrubs, and perennials. On this page: WHY PLANT IN FALL. SPRING-BLOOMING BULBS.
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.
A second bit of advice from numerous research-based sources is to divide spring- and summer-blooming perennials in the fall, from mid-September to mid-October. This will give the divisions some time to develop stronger roots before the ground freezes.
Storage of cuttings
It is best to harvest cuttings in early spring and plant immediately but if this is not possible, cuttings can be stored safely for about 4 months. Store cuttings in a cool, dark, and moist place. Do NOT store in a wet area as this will promote root growth and weaken the cutting.
Several cuttings may be placed together in one container. Be sure to add fresh water as needed until the cuttings are fully rooted. 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.