When do the plum blossoms bloom?
As the first of the famous traditional flowers in China, plum blossoms have become immortal images in the works of literati and literati because of their unique characteristics. However, there are still many cognitive misunderstandings about the flowering characteristics and special varieties of plum blossoms. In-depth interpretation of the biological characteristics of plum blossoms. Standard flowering period and morphological characteristics. The natural flowering period of Plum (Prunus mume) is concentrated from February to March. When the temperature rises to the range of 5-10℃, the flower buds that have undergone low-temperature vernalization begin to sprout. Its flowers have a diameter of 2- 2.5 cm and have typical Rosaceae characteristics. The petals are arranged obovate. The white and pink color system are common. The characteristics of flowers opening before the leaves create a unique ornamental effect. Factors influencing flowering control Modern horticulture research has found that flowering can be advanced to around New Year's Day by regulating the light cycle. Due to special climatic conditions in low-latitude areas such as Dali, Yunnan, the natural flowering period is 15-20 days earlier than that in the Yangtze River Basin. When the cumulative temperature value GDH reaches 380℃·d, most varieties enter the early flowering stage. The special flowering phenomenon reveals the truth about the second flowering of plum blossoms, textual research, the "second flowering of plum blossoms" in traditional allusions is actually a literary creation, and no plum species that truly blooms twice has been discovered from the perspective of botany. However, Androsace umbellata, as a Primulaceae plant, is often mistaken for a plum blossom variety with its characteristics of blooming white flowers from January to April and turning red from May to June. Analysis of causes of abnormal flowering There are occasional records of abnormal secondary flowering caused by extreme weather: In 2020, Nanjing Sun Yat-sen Mausoleum Plum Garden had back-to-season flowering in November. Research has confirmed that it was caused by a stressful flowering reaction caused by typhoon damage to leaves. Such phenomena are unsustainable. Four-step rule for scientific flower promotion, light and temperature control technology, when will the plum blossoms bloom?
1. Photoperiod management: Ensure ≥6 hours of direct light every day in autumn, and use of reflective film can improve the lighting efficiency by 30%. 2. Temperature step control: By adjusting the temperature in the smart greenhouse in three stages (5℃/15℃/20℃), the flowering period can be accurately controlled within ±3 days. Nutritional management plan 3. Precision fertilization: Apply slow-release fertilizer at the ratio of N:P:K=1:3:2 during flower bud differentiation period, combined with foliar spraying of 0.2% potassium dihydrogen phosphate solution. 4. Pruning system: Adopt the "three-branch renewal method" to retain 60% of the annual strong branches, remove cross branches and weak branches, and provide a concentrated supply of nutrients.
Through the comprehensive application of modern gardening technology, we can not only maintain the traditional ornamental characteristics of plum blossoms, but also achieve precise control of flowering periods. It is worth noting that the pursuit of off-season flowering should be based on respecting the natural growth laws of plants so that this thousand-year-famous flower can bloom forever.