How to make sunflowers bloom more
Sunflower is the most representative ornamental plant in summer, and its splendid sea of flowers can always light up the entire courtyard. However, many flower lovers find that their own sunflowers bloom less and flowers are small, which is often closely related to the details of daily maintenance. This article will systematically analyze the key factors affecting sunflower flowering, from light regulation to nutrition management. Sunflower explosion maintenance strategy 1. Regulation of light intensity and duration Sunflowers require ≥6 hours of direct light per day, and the optimal growth temperature is 20-35℃. It is recommended to adopt an east-west planting layout and receive full sunshine from morning to evening. There is no need to shade at noon in summer, but light needs to be replenished in rainy weather. Plant growth lights can be used to replenish the blue-purple spectrum for 3 hours every day. 2. Intelligent temperature control and flower promotion plan Controlling the temperature difference between day and night at 8-10℃ is most conducive to flower bud differentiation. When the night temperature continues to be <15℃, it is recommended to cover it with a transparent insulation film. Potted plants can be moved into sunrooms, while temporary greenhouses can be built for local planting. Use a thermometer to monitor in real time and maintain the substrate temperature above 18℃. 3. The precise water and fertilizer management strategy adopts the "see dry and wet" watering method, which is better combined with a siphon water supply system. Use 20-20 -20-20 compound fertilizer to dilute it 1000 times for long-term growth, and use 10-30-20 high phosphate fertilizer during the bud stage. Adding decomposed sheep manure organic fertilizer can increase the diameter of flowers by 15%-20%. Analysis of sunflower flower miniaturization 1. The genetic characteristics of varieties affect the single flower diameter of double-petal varieties is usually 4- 6 cm, and the single flower diameter can reach 8cm. It is recommended to choose large flower varieties such as "Flame Dancer" and "Jinhui". Excellent characters can be retained through cuttage propagation to avoid the separation of characters caused by seed propagation. 2. Environmental stress response plan Insufficient light caused by continuous rain will reduce the flower diameter by 30%-50%. It is recommended to install a canopy and apply additional calcium chelate fertilizer to enhance the strength of the cell wall. Strengthen ventilation when the air humidity is greater than 80%, and use sulfur powder to prevent mildew. 3. Correction measures for nutritional imbalance: Phosphorus deficiency is manifested by thinning petals, and potassium deficiency leads to thin and weak pedicels. Regularly test the soil EC value and maintain it at 0.8-1.2mS/cm. Spray 0.2% potassium dihydrogen phosphate +0.1% borax solution on the leaves during the flower bud period once a week for 3 consecutive weeks.
Through systematic environmental control and precise maintenance, sunflowers can continue to bloom for more than 120 days. It is recommended to establish a maintenance log to record daily light duration, temperature and humidity changes and fertilization conditions, and adjust the management plan in time based on plant performance so that each sunflower can show its best condition.