How to Propagate Dahlias? A Detailed Guide to Cuttings, Division, and Sowing

Dahlia is a fairly common plant in people's daily lives, and many people choose to grow it at home. As more people grow it, its propagation is also a matter many people care about. How do you propagate dahlias, and what propagation methods are there for dahlias? Let's take a look below.

1. How to Propagate Dahlias / Cuttings / Division / Sowing

2. Propagation Methods for Dahlias

1. Cutting Propagation

Cutting time: Cuttings are the most common method of propagating dahlias. It can generally be done in spring, summer, and autumn, but the most suitable time is March to April, when the survival rate of cuttings will be a bit higher.

Cutting method: When taking cuttings, the cuttings we choose should preferably be about 8cm long, and the container chosen for rooting should preferably have a diameter greater than 25cm. Before inserting the cuttings, water the soil first so that the cuttings are not damaged during insertion because the potting soil is dry. Generally, after successful insertion, roots will basically form in 2-3 weeks.

2. Seed Propagation

Sowing time: The time for seed propagation is similar to that for cuttings, generally best around April. The environment at this time is most suitable for dahlia growth, and the survival rate is also relatively high, so choosing the propagation time is also a fairly important point.

Sowing method: When sowing, we can evenly scatter the seeds on the surface of the soil, then cover them with a layer of soil about 2cm thick. After that, watering is needed. When watering, it is best to use a spray bottle to spray, because dahlia seeds are relatively small, and direct watering can easily wash the seeds away. After watering, seedlings will basically emerge in about 7 days.

3. Division Propagation

The time for division propagation is generally also around March to April. When dividing, we first need to remove the mother plant from the flowerpot, then use scissors to cut the underground stems connecting the leaf clusters in order to separate and plant them. Generally, about 2-3 plants can be divided out. After division, normal planting is all that is needed.

Cutting Propagation Method for Dahlias

Dahlia is one of the world's famous flower varieties, and there are already more than 30,000 dahlia varieties. General sowing and division methods are both suitable for dahlias. In fact, dahlias can also be propagated by cuttings. Let me introduce to you the precautions for propagating dahlias by cuttings.

Dahlia

For dahlia cuttings, the terminal buds, axillary buds, and basal shoots from all parts of the whole plant can be used, but basal shoots are best. The cutting time can be from early spring to summer and autumn, with the highest survival rate in March and April. Cuttings can take root in about 2 weeks (but some flower lovers have had cuttings that did not take root for 1-2 months, although leaves grew). To improve the survival rate of cuttings, before inserting them, place the root clusters in a greenhouse to force sprouts and maintain a temperature above 15°C; they very easily all fail. When the young shoots are 6-10cm, that is, when the basal shoots have grown 2 true leaves, cut them for cuttings.

Some flower lovers have also tried water propagation and using vermiculite as a substrate for cuttings, and both can be successfully propagated (be sure not to expose them under the scorching sun). After the cuttings survive, when they reach 15cm, you can consider pinching the tops, which can dwarf the dahlia plant and increase flowering.

The reason many flower lovers want to try propagating dahlias by cuttings is that dahlia stems are both hollow and brittle and are easily blown over and broken by the wind, so bamboo sticks should be inserted promptly for support. Inserting bamboo sticks can also prevent the branches from growing crooked and improve the ornamental value of potted plants. When the plant grows taller than 30cm, a small bamboo stick should be inserted beside each branch and tied and fixed with hemp fiber (or thin string). As the plant grows taller and taller, longer bamboo sticks should also be replaced promptly, and finally the inserted small bamboo stick should reach up to the lower part of the flower bud.

What Propagation Methods Are There for Dahlias

Dahlia, also known as Xifanlian and dahlia chrysanthemum, is a perennial herb in the genus Dahlia of the Asteraceae family. It originated in Mexico and is now grown all over the world. There are more than 30,000 varieties, and it is one of the world's famous flowers. The main propagation methods for dahlias are cuttings and root division, while sowing is mainly used in breeding.

What Propagation Methods Are There for Dahlias

(1) Cuttings

Softwood cuttings are usually taken from March to May. In March, place the tuberous root clusters in a hotbed or greenhouse, heel them in to force sprouts. When the shoots grow to 6-7cm, leave two leaves below and cut the cuttings. When the two axillary buds at the base grow to 6-7cm, leave two leaves again and cut cuttings. In this way, cuttings can continue to be taken until May. Insert them into a sandy soil seedling bed, then water thoroughly, place them in a shaded place for several days, and after a few days gradually move them into sunlight. Cuttings can bloom in the same year, and after the seedlings grow vigorously and the root system is well developed, they can be potted up.

(2) Root Division Propagation

In March to April, take out the stored tuberous roots and divide them. Because dahlias have stems only at the root crown, each divided tuberous root must have a root crown with buds. Before dividing, sprouts can also be forced first. The method is to first arrange the tuberous roots relatively closely in a hotbed, then cover with soil and water, and provide a certain temperature. After sprouting, divide them so that each division has at least 1 bud. After dividing, smear the cut surfaces with plant ash and let them dry to prevent rot, then plant them into the seedling bed.

(3) Sowing

Generally, dwarf potted varieties are propagated by sowing. Sow in seedling pots from March to April, cover lightly with soil after sowing, water by the immersion method, and keep the potting soil moist. At a temperature of about 20°C, they germinate in about 7 days. When the seedlings are 5-8cm tall, transplant them into flowerpots or a seedling bed, and they can bloom from August to October of the same year.

Dahlia is the most widely cultivated flower in the world, and it is cultivated in many provinces and cities in China. Dahlia flowers are large and rich in color, and they are a common ornamental flower. Dahlias are rich in varieties, but the time of artificial selection and breeding has not been long, and cuttings and root division are mostly used for propagation. In this article, I have compiled the propagation methods for dahlias for you, and I hope they are helpful to you.