Calibrachoa, often called “million bells,” are popular annuals known for their prolific, petunia-like blooms. They are a favored choice for hanging baskets and containers, providing continuous color. Propagating calibrachoa offers an effective way to multiply these attractive plants, allowing gardeners to expand their collection without additional expense. This article provides a guide to successfully propagating calibrachoa.
Why and When to Propagate Calibrachoa
Propagating calibrachoa offers several advantages, including saving money and multiplying favorite varieties that may be difficult to find commercially. It also provides a means to preserve plants over winter in non-hardy regions. The optimal time for propagation is late summer to early fall, when parent plants are vigorous. Taking cuttings during this period allows new plants sufficient time to establish roots before cooler weather arrives.
Calibrachoa Propagation Methods
Several methods exist for propagating calibrachoa, but cuttings are most effective for home gardeners. Seed propagation is less common for hybrid varieties because offspring often do not retain the parent plant’s desired characteristics. Therefore, seed propagation is usually reserved for non-hybrid types or breeding. The most reliable method for home gardeners to maintain specific plant characteristics is propagation from cuttings, as this technique ensures new plants are genetically identical to the parent.
Propagating Calibrachoa from Cuttings
Propagating calibrachoa from cuttings begins by selecting healthy, non-flowering stems from the parent plant. Choose stems 4 to 6 inches long, free from disease or pest damage. Using clean, sharp pruners or scissors, make a cut just below a leaf node, which is a small bump on the stem where a leaf or branch emerges. Remove leaves from the bottom 2 inches of the cutting to prevent rotting.
Dipping the cut end in rooting hormone can enhance root formation, though it is not strictly necessary. Prepare a well-draining, aerated rooting medium, such as perlite and peat moss, coarse sand, or a seed starting mix. Moisten the medium thoroughly before inserting cuttings. Create small holes with a pencil to avoid damaging the cutting.
Gently insert the cuttings into the holes, ensuring at least one node is buried. Space them to allow proper air circulation. To create a humid environment, cover the planted cuttings with a clear plastic dome or bag, ensuring it doesn’t touch the leaves. Place the container in a warm location with bright, indirect light, avoiding direct sunlight which can scorch cuttings.
Caring for New Calibrachoa Plants
Once calibrachoa cuttings are planted, consistent care is important for successful root development. The rooting medium should be kept consistently moist but never waterlogged, as excessive moisture can lead to rot. Regularly check moisture and mist leaves if humidity is low under the plastic cover. Initially, bright, indirect light is ideal to prevent stress on developing roots.
As cuttings show new growth, indicating successful rooting, gradually increase their light exposure. This process, known as hardening off, prepares young plants for outdoor conditions. Slowly remove the plastic cover for increasing periods each day over one to two weeks. Once new calibrachoa plants have developed a robust root system and significant new foliage, they are ready for transplanting. Carefully move them into larger pots or their final outdoor location, ensuring minimal root disturbance.
Troubleshooting Calibrachoa Propagation
Issues can arise during calibrachoa propagation. Cuttings may wilt from insufficient water or low humidity; increase misting or ensure the plastic cover is sealed. Rotting can occur if the rooting medium is too wet or lacks air circulation; ensure proper drainage and avoid overwatering. If cuttings fail to root, consider cold temperatures, insufficient light, or non-sterile tools. Provide consistent warmth, bright indirect light, and sanitize tools before use.