Written by Ivy
Jan 12 2023
The good news is that all gardeners can easily propagate (reproduce) Crepe Myrtle at home because it is surprisingly simple. All that is required to get started is a mature, healthy tree.
A topic like propagation can be intimidating to dive into, especially if you've never given it a shot before. Not to worry, though; we'll go over crepe myrtle propagation in detail while keeping things straightforward.
Peat
Perlite
Bucket
Pots
Isopropyl alcohol
Pruning shears
Rooting hormone
Clear plastic bags
Potting soil
Cuttings from crepe myrtle trees can be easily multiplied, and the growing seasons of June, July, and August are ideal for taking cuttings and establishing them.
You can prune a branch that is two to three feet long when the tree has lost its leaves and gone dormant (typically in late November). Cut that branch into half-inch-diameter, four to eight-inch-long cuttings. Make your cuts along the branch just below a leaf node or bud (see illustrations).
A crepe myrtle tree's leaves change color in the fall from yellow to orange to red. How beautiful they could be in your yard.
Crepe myrtle trees have new growth at the tips of the branches. When the growth is still soft and green, softwood cuttings are taken. They can be taken at any time during the tree's busiest, most active growth season (the best time is typically between late May and mid-June).
Softwood cuttings taken early in the summer will have plenty of time to establish themselves before the winter dormancy period. After July, you should refrain from taking softwood cuttings.
You are now well on your way to cultivating one of the most stunning trees in the entire world!
Crepe myrtles are extraordinarily simple to grow from seed, in contrast to many other widely used landscape plants.
Wait until the pods are just starting to open on their own before picking seeds directly from the plant. The seeds can be manually shaken free from the pods and into a bag or bowl, though some will eventually fall to the ground naturally.
Cut the seed pods off before they open if you'd rather not wait for the ideal moment to shake seeds from your Crepe Myrtle's branches.
Bring the group of seed pods inside, then submerge the stem in water. You can easily gather the seeds at your own pace once they eventually open on their own.
Gathering more seeds than you anticipate using is a good idea because many of them won't grow.
In general, collected crepe myrtle seeds are viable for at least two years. Even though older seeds still have a chance of germination, the likelihood will gradually decline with time.
You don't need to be concerned about finding a partner plant to produce seed because Crepe Myrtle flowers can self- and cross-pollinate. The fact that Crepe Myrtles grown from seed won't be exactly like the parent plant should be remembered.
A great way to increase the size of your garden without taking cuttings from the actual tree is to grow Crepe Myrtles from root tissue.
Use a sharp, clean garden knife to carefully cut pieces of root that are between two and four inches long after carefully excavating around the crepe myrtle's root system.
Because so much cell division takes place in this region, cuttings taken from close to the root crown typically produce more vigorous growth.
Using a cutting with several healthy nodes is essential for effective Crepe Myrtle propagation using this technique. The raised areas of a stem known as nodes are where new growth, such as stems, leaves, and flower buds, first appears. Four to three nodes make up the ideal cutting.
Cuttings from crepe myrtles, whether softwood or semi-hardwood, should be taken as near as possible to the main branch. To put it another way, you should choose a softwood or semi-hardwood branch that is the right length rather than trimming a longer one.
The best time to propagate Crepe Myrtle is entirely dependent on the method you choose:
Before they are ready to be harvested, crepe myrtle seed pods must reach maturity on the tree. Refrain from harvesting the seeds inside seed pods until they are dry and brown. Late fall is usually when this occurs. When seeds are most likely to germinate—early spring—they should be stored for the best results.
When the crepe myrtle is dormant, roots should be cut. Because the new plant can enter the growing season right away, early spring is typically the best time to propagate by root cuttings.
During the spring and summer, stem cuttings can be used to propagate Crepe Myrtles almost whenever you like. Just bear in mind that depending on your precise timing, softwood or semi-hardwood cuttings may be easier to come by.
The soil in which Crepe Myrtle grows is not important to it in the same way that it is for many other plant species. This is also accurate when growing Crepe Myrtle from seeds or different cuttings.
I suggest utilizing a multipurpose potting mix when starting seeds or cuttings in containers. You can use garden soil if you'd like, but store-bought potting soil is less likely to have bugs, fungi, or diseases.
Feel free to add a layer of sphagnum moss or clean mulch to the surface of the container as well, given how important moisture is at this stage of propagation. You can completely enclose the seedling or cutting in a plastic bag if it will be kept in a relatively dry location.
The use of containers when propagating crepe myrtle is recommended. The cutting or sprouted seed will therefore eventually need to be moved to its final location in the landscape.
I advise relocating propagated Crepe Myrtles to the planned planting area a few weeks before transplanting. The plants can then begin to acclimate before being taken out of their original container by doing this.
Make sure to preserve the newly established root system when transplanting your propagated Crepe Myrtle from the pot to the ground. The roots will have plenty of room to spread out and continue growing if you dig a hole that is at least 50% wider than the roots.
Sprinkle a slow-release granular fertilizer for Crepe Myrtle into the planting hole and be careful not to plant your sapling too deep in the soil. No matter how tiny the root ball is, its top should be level with the soil's surface. (Read More: When to Fertilize Your Crape Myrtle)
Crepe myrtles should typically be planted in the late fall or early spring. This gives the plant enough time to adapt prior to the chilly winter or sweltering summer.
For instance, a seed sown in the spring may be moved that fall or left in its container until the following spring. Root and stem cuttings work the same way.
Both transplanting as soon as possible and giving the plant a little more time to mature have advantages.
A Crepe Myrtle seedling or rooted cutting is given plenty of time to adapt to its new location when transplanted just a few months after it was originally planted.
The possibility of severe transplant shock, which could impair growth and flower production the first year, is reduced. The disadvantage is that a seedling or cutting that hasn't yet established itself may not withstand environmental factors or pest attacks.
Your Crepe Myrtle will benefit from a stronger trunk and wider root system if you hold off on transplanting it for a little while. The Crepe Myrtle might not settle in as quickly because the transplanting procedure will be more physically demanding.
Another simple method of crepe myrtle tree propagation is to discover how to start them from the roots. Early spring is the best time to dig up and plant root cuttings in containers. Put the pots in a greenhouse or other appropriate space with enough heat and light.
Crepe myrtle can be multiplied in a variety of ways, but immersing cuttings in water is not one of them. In comparison to using potting soil, this method of re-rooting Crepe Myrtles has a very low success rate. Additionally, rot is more likely.
Some plants can grow roots in water, but Crepe Myrtle cuttings grow stronger roots when they are rooted in a soilless potting mixture. Additionally, you could use sand or perlite, particularly for cuttings that require good drainage and might rot if left too wet.