How to manage chrysanthemum spring
As the temperature gradually rises, chrysanthemums enter the spring growth season. Management during this period is directly related to plant health and flower quantity and quality throughout the year, and it is particularly important to master scientific maintenance methods. This article will systematically analyze the four core links of spring chrysanthemum maintenance to help you cultivate high-quality chrysanthemums with lush branches and lush flowers. 1. Root system renewal management 1.1 Timing of pot change When the temperature stabilizes at 12-15℃, new buds of chrysanthemum seedlings germinate about 3 cm long, which is the best pot change period. It is recommended to choose sunny mornings for three consecutive days to avoid root infections caused by rainy days. 1.2 The soil ratio plan uses a mixed substrate of humus soil: vermiculite: perlite =5:3:2, and adds 200g of bone meal and 150g of slow-release fertilizer per cubic meter, which not only ensures air permeability but also provides continuous fertilizer supply. 1.3 Key operating steps: Keep 1/3 of the protective soil and cut off the old roots. A 3-cm ceramsite layer is laid at the bottom of the new basin. When covering with soil, the plant is gently lifted to stretch the root system, and finally the root-fixing water is poured through. 2. Environmental control strategy 2.1 Control the timing of leaving the room. Control the daytime temperature to be stable above 10 ° C. You can move it outside, but you still need to cover non-woven fabrics for insulation at night. Pay attention to the weather forecast and avoid late spring cold periods. 2.2 Windproof measures Set up a windproof board with a height of 50cm on the north side of the plant, or use bamboo poles to build a triangular bracket and cover it with a 30-mesh insect net to both prevent wind and insects. 3. Nutrient supply plan 3.1 Fertilizer selection principles Use quick-acting fertilizers with N-P-K=15-5-10 during the germination period, and switch to 5-15-10 high phosphate fertilizers during the bud period. Fermented sheep manure is used as organic fertilizer, and 20g/plant is buried shallowly every month. 3.2 The frequency of fertilization is controlled in accordance with the principle of "applying thin fertilizer frequently." Liquid fertilizer is diluted to 1/2 of the concentration in the instructions, applied once every 10 days, and replenished in time after rain. 4. Water management skills 4.1 Observation and watering method adopts the "two-finger detection method": insert the index finger and middle finger into the soil for 2 cm, and water when there is no moisture at the fingertips. Maintain micro-tide in the substrate during the seedling period. 4.2 The watering period is selected to complete watering before 10 a.m. on sunny days to avoid high temperature transpiration at noon. Use drying water at about 25℃ to maintain a temperature difference of ±3℃ from the soil temperature.
Through scientific pot replacement and root pruning, precise environmental control, reasonable nutrient supply and intelligent water management, and regular observation of plant conditions, chrysanthemums can be laid for growth in spring. It is recommended to take growth record photos every 7 days, establish a maintenance log, and adjust the management plan in time based on plant feedback to fully prepare for the full bloom in autumn.