Cactus fertilization methods
As a highly ornamental desert plant, the key to the maintenance of cactus lies in precise fertilization. Many growers often fall into the confusion of "whether to fertilize" and "what kind of fertilizer to use." This article will systematically analyze the advanced techniques of fertilizing cactus from scientific fertilization to seasonal maintenance. 1. Control of fertilization cycle and growth rhythm 1.1 Golden fertilization period March to October is the active period for cactus growth, when root absorption efficiency increases by 40%. It is recommended to maintain basic fertilization twice a month and add trace element supplements during the rapid growth period from April to June. 1.2 During the dormant period, it is forbidden to completely stop fertilization when the temperature is lower than 15℃. At this time, fertilization will cause cell rupture. Growers in the north are specially reminded that they still need to observe the state of the plants in the heating environment in winter to avoid misjudging the growth period. 2. Scientific plan for fertilizer compatibility 2.1 The ratio of organic fertilizers to bone meal and fish meal of 3:1 can provide a perfect nitrogen and phosphorus ratio (NPK 5-10-5). Self-retting manure needs to be completely fermented for 90 days, and regular stirring to accelerate decomposition to avoid burning the roots of raw manure. 2.2 It is recommended to dilute the nutrient solution to commercial liquid fertilizer to 1/2 of the marked concentration, and the EC value should be controlled at 0.8-1.2mS/cm. Adding 0.02% magnesium sulfate can enhance drought resistance. 3. Operation Guidelines for Precision Fertilization 3.1 Root irrigation techniques use the "three-ring irrigation method": with the plant as the center, irrigation is carried out in three circles outside a radius of 15cm. Combined with the bamboo stick test method, observe the humidity 2 hours after inserting the pot soil. 3.2 Use atomized spray nozzles for foliar spraying to replenish foliar fertilizers in the morning. Focus on spraying newborn spines, and the urea concentration must be <0.3%. 4. Common Misunderstandings Avoid 4.1 Salt Damage Prevention Regularly measure the EC value of basin soil. If it exceeds 2.5mS/cm, it should be rinsed immediately. It is recommended to thoroughly rinse the basin soil with purified water three times every quarter. 4.2 First aid for fertilizer injuries found yellowing immediately stopped fertilizer, and used activated carbon solution to irrigate roots to absorb excess nutrients. For severe fat injuries, 50% of the plant material needs to be replaced.
By mastering the core principle of "fertilizing in three seasons and resting in winter" and cooperating with a scientifically proportioned organic fertilizer plan, the annual growth of cactus can be increased by 60%. Growers are advised to establish a fertilization log to record each fertilizer ratio and plant response, and gradually form a personalized maintenance plan.