Can gardenia be cut alive in spring?
As an aromatic evergreen shrub, gardenia is favored by gardening enthusiasts for its white flowers and refreshing aroma. As the most economical and efficient method of reproduction, cuttage can successfully cultivate new plants in spring has become the focus of attention of many flower lovers. This article will systematically analyze the golden rule of gardenia cuttage from plant growth rules to operation details. Analysis of the advantages of gardenia cutting in spring. The stable temperature range of 15-25℃ is the core factor for gardenia to take root, and spring is in this temperature zone. It can be operated when the ground temperature rises to 18℃ from February to March in the south, and it is advisable to operate after the frost period ends from April to May in the north. The best branch activity is the mother plant that has experienced winter dormancy. The new branches germinating in spring are rich in auxin. The semi-lignified branches have flexibility and nutrient reserves, and are more likely to form calli than summer and autumn branches. The four-step precise cuttage method selects strong branches with a diameter of 5-8mm and retains 3-4 leaf nodes (about 10-15cm). Pay attention to the section of the incision: high-quality cuttings should show bright green pith, and if brown lesions appear, they should be discarded. The scientific ratio of the substrate recommends a mixture of perlite: vermiculite: peat soil in a ratio of 1:1:2, which can not only ensure air permeability but also maintain moderate water retention. Disinfect with 0.5% potassium permanganate solution in advance to effectively prevent black stem disease. Root promotion treatment techniques After 45° oblique angle to increase the water absorption area, soak in 200ppm naphthylacetic acid solution for 30 minutes. Keep the top 2 leaves and cut off 1/2 of the leaves to reduce transpiration while maintaining photosynthesis. The intelligent maintenance system uses "intermittent spray method" to maintain 85% air humidity, and cooperates with sunshade nets to control the light intensity between 8000- 10,000 lux. 20-25 White calli can be seen every day, and the seedlings can be gradually strengthened after 35 days. Later management points: When the new root system reaches 5 cm, transplant it to a mixed substrate with humus soil: river sand =3:1. Seaweed fertilizer (EC value 1.2mS/cm) is watered once a week for the first two weeks, and then transferred to routine maintenance after new buds germinate. Through systematic operation, the survival rate of spring cuttage can reach more than 95%.