When does the spring flower bloom
When the winter chill has not yet faded, the golden winter jasmine has quietly bloomed on the branches, announcing the arrival of spring with bright colors. This deciduous shrub, known as the "first branch of the east wind", not only carries people's expectations for spring, but also becomes a hot research object for horticulture enthusiasts because of its unique biological characteristics. Today, we will explore in depth the mystery of the growth of winter jasmine and unlock practical techniques to keep this spring light permanent. Analysis of the phenological characteristics of Jasminum mollissima Natural flowering rules The typical opening period of Jasminum mollissima is concentrated from February to April. For every 1 degree decrease in latitude, the flowering period is advanced by 3-5 days on average. Most of the Yangtze River Basin shows its beauty around the beginning of spring, while in the northern region it reaches the sting season slightly later. This difference stems from the fact that flower bud differentiation requires low temperature and vernalization in winter, and the flowering mechanism is triggered when the cumulative temperature reaches 200℃. Temperature control experimental data can achieve annual viewing through manual intervention: ·In a constant temperature environment of 13℃, flower bud development can be completed in 21 days·In a growth box of 20℃, flowers can bloom on 10 days·Refrigeration treatment at 8℃ can extend the flowering period of a single flower to 15 Days of scientific maintenance The light energy management plan for the three major elements of direct light for more than 6 hours a day is the best, and a 40% sunshade net is required in summer. It is worth noting that moderate light control during flower bud formation (4 hours a day) can promote nutrient accumulation and increase inflorescence density by 30%. Optimization of substrate ratio The ideal cultivation substrate should include: ·40% legus soil (to provide organic matter)·30% river sand (to enhance air permeability)·20% red jade soil (adjust pH to 5.5-6.5)·10% bone meal (slow-releasing calcium and phosphorus elements) Adding sulfur powder (1kg/㎡) when changing pots every spring can maintain soil acidity. The collaborative management of water and fertilizer adopts the "see dry and wet" watering method, and is combined with nutrient solution with EC value of 1.2-1.5mS/cm. Key fertilization nodes: ·Germination period: balanced nitrogen, phosphorus and potassium fertilizer (20-20-20)·Bud pregnancy period: high-phosphorus formula (10-30-20)·Post-flowering recovery: organic liquid fertilizer (diluted 500 times) Experiments show that foliar spraying 0.1% boric acid solution can increase the flower diameter by 15%. The secret to extending the viewing period is moved to an environment of 10-12 ° C and combined with 70% air humidity to extend the overall viewing period to 45 days. Be careful to avoid direct air conditioning. Soft scattered light for 3-4 hours a day can maintain bright colors. Using a siphon water supply device to keep the substrate moist can reduce temperature fluctuations caused by frequent watering.
After mastering these principles, try to create your own "Spring Theater" on the balcony. When the golden flowers bloom proudly in the harsh spring cold, the sense of accomplishment that breaks the shackles of the seasons is the unique romance that gardening brings to us.