When to Graft Osmanthus Tree
As one of the top ten famous flowers in Chinese tradition, the osmanthus tree is deeply loved by horticulture enthusiasts for its fragrant aroma and evergreen characteristics. To cultivate high-quality varieties, mastering the correct grafting technique is particularly crucial. This article will systematically analyze the key points of osmanthus tree grafting, from timing selection to operational details.
Osmanthus Tree Grafting Timing Selection
Best Grafting Season
Early spring (February to March) is the best grafting period, when the sap begins to flow but has not fully germinated, and the temperature is stable between 15-25℃, with strong activity of the cambium cells in the scion and rootstock, which is conducive to the rapid formation of callus. Data shows that the survival rate of grafting at this stage can reach over 85%.
Special Period Grafting
Experienced gardeners can perform grafting in autumn (September to October), needing to choose consecutive sunny days and immediately apply a bag for insulation after grafting. It is important to control the moisture at the joint to prevent decay caused by rainwater seepage.
Osmanthus Tree Grafting Practical Techniques
Cut Grafting Operation Guide
1. Scion Treatment: Select 1-year-old robust branches with a diameter of 0.5cm, retain one pair of complete leaf buds, and cut the lower end into a 3cm楔形 (wedge-shaped) oblique surface. 2. Rootstock Treatment: Make a horizontal cut 5cm from the ground and vertically cut a 2.5cm incision along the cambium. 3. Joint and Fixation: Align the wedge-shaped surface of the scion with the cambium of the rootstock and wrap it with elastic plastic tape from bottom to top to seal.
Embedding Grafting Advanced Techniques
1. Rootstock Treatment: Make a 30° angle斜切 (oblique cut) on the smooth surface, reaching 1/3 of the wood depth. 2. Scion Trimming: Shape the budless side into a plane that fits perfectly with the rootstock cut. 3. Embedding and Insulation: After embedding the scion, wrap it with double-layer film, and use aluminum foil on the outside to reflect sunlight and prevent sunburn.
Key Post-Grafting Care Points
1. Timing of解开绑带 (Unbinding): Gradually unbind when the new shoots reach 15cm to avoid forming scars. 2. Rootstock Management: Check the rootstock sprouts every month and remove them in time to ensure nutrient concentration. 3. Root Replacement Technique: When the scion diameter reaches 2cm, use the ring剥压条法 (ring stripping and pressing method) to induce self-rooting. 4. Anti-Frost Measures: Wrap the grafting part with straw rope in winter and cover it with non-woven fabric to prevent frost.
Through scientific grafting, it is not only possible to achieve rapid propagation of valuable varieties such as golden osmanthus and red osmanthus but also enhance the plant's resistance. It is recommended for beginners to start with cut grafting, and gradually master this traditional technique with the control of temperature and humidity.