Best Time for crabapple Fertilization
As a traditional famous Chinese flower, the key to maintaining crabapple lies in precise fertilization. Mastering the correct fertilization timing and remedial measures can not only promote lush flowers and leaves but also avoid fertilizer damage. This article systematically analyzes the key points of the full cycle management of crabapple fertilization, helping you create a healthy and robust garden landscape.
I. Mastering crabapple Fertilization Timing
Spring and Autumn Fertilization Tips
In the spring, from April to May during the period of new bud germination, it is recommended to apply diluted mature cake fertilizer water weekly, combined with 0.1% potassium dihydrogen phosphate foliar fertilizer. In autumn, from September to October during the flower bud differentiation period, switch to high-phosphorus potassium compound fertilizer, applying 5-8 granular slow-release fertilizers every half month to promote the formation of flower buds.
Seasonal Adjustment Techniques
Pause fertilization when the early spring temperature is below 10°C, and switch to organic liquid fertilizer during the high-temperature summer period. Special attention should be paid to the "Autumn Old (H)" stage in early autumn, with fertilization recommended at 18-19 pm after sunset, avoiding high temperatures that can cause root burn.
II. crabapple Fertilizer Damage Treatment Plan
Urgent Dilution Operation
If the edges of the leaves become scorched, immediately water the plant continuously three times with clean water, spacing each watering 20 minutes apart. Use the immersion method by placing the pot in a bucket of water for one hour to remove excess fertilizer solution through siphon action.
Root Repair Process
For severe fertilizer damage, repotting is required: ① trim the blackened roots, retaining healthy white roots ② soak in a carbendazim solution for 30 minutes ③ replace with a mixture of peat and perlite soil with a pH of 5.5-6.5 ④ cover with a bag to keep moisture and slow seedling growth for 7 days.
III. Advanced crabapple Fertilization Guidelines
Precise Fertilization Location
Apply fertilizer in a 5cm circular trench along the edge of the pot, avoiding contact with the main root. Foliar fertilizer should be evenly sprayed on the back of the leaves, and if it rains within 6 hours after application, a补充 spray is needed. Focus on supplementing boron and zinc micro-fertilizers during the flowering and fruiting period to improve fruit setting rate.
Nutrition Management Taboo
Do not fertilize newly potted plants for 30 days, and wait for the grafting interface to heal before fertilizing grafted seedlings. Pay attention to maintaining the nitrogen-phosphorus-potassium ratio at 1:2:1, as excessive nitrogen fertilizer can cause excessive growth. Organic fertilizer must be fully decomposed, as raw fertilizer can cause root rot.
Scientific fertilization is the core technique of crabapple maintenance, establishing the principle of "light and frequent fertilization" combined with dynamic management of "observation and adjustment" to effectively prevent fertilizer damage. It is recommended to keep a fertilization log, recording each fertilization time, type, and plant response to gradually form a personalized maintenance plan.