Grapefruit belongs to the Rutaceae family, citrus genus, and produces the largest fruits among citrus varieties. To achieve high and stable yields in grapefruit cultivation, proper fertilization is essential. Let's explore the most suitable fertilizers for grapefruit trees.
Fertilization for Young Trees
Young grapefruit trees, which have not yet reached fruit-bearing age, have shallow root systems and relatively weak nutrient absorption capacity. Therefore, they require light fertilization. Fertilize every month from March to July, and apply winter fertilizer in November. Use mainly organic nitrogen fertilizer, human excrement, and cake fertilizer.
Fertilization for Mature Trees
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Bud-breaking Fertilization: Apply fertilizer 10-15 days before fruit trees sprout in early March. Use quick-acting nitrogen fertilizer combined with appropriate amounts of phosphorus and potassium fertilizer to promote better spring shoot growth.
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Fruit-enlarging Fertilization: From June to August, mainly apply nitrogen fertilizer combined with phosphorus and potassium fertilizer. The fruit enlargement period requires sufficient nutrient fertilizer. Apply 0.5 kg urea + 0.5 kg compound fertilizer per plant. Trees with heavy fruiting need more fertilization.
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Harvesting Fertilization: Usually applied in early November, use 0.5 kg urea + 0.5 kg compound fertilizer + 5 kg cake fertilizer per plant, and supplement with potassium dihydrogen phosphate if necessary to help the trees recover promptly.
In each fertilization, remember to water appropriately after application. Planters can dig a circular pit around the fruit trees, with a depth and width of one foot, then refill the soil after fertilization and watering.
Above are the recommendations for the best fertilizer for grapefruit trees. Throughout the growth period of grapefruit trees, different fertilization strategies should be adopted according to different seasons.
Frequently Asked Questions (FAQ)
1. How often should I fertilize young grapefruit trees?
You should fertilize young grapefruit trees every month from March to July, with winter fertilizer applied in November. Use mainly organic nitrogen fertilizer, human excrement, and cake fertilizer.
2. When should I apply bud-breaking fertilization for grapefruit trees?
Bud-breaking fertilization should be applied 10-15 days before fruit trees sprout in early March. Use quick-acting nitrogen fertilizer combined with appropriate amounts of phosphorus and potassium fertilizer to promote better spring shoot growth.
3. What is the recommended fertilization for fruit-enlarging period?
During the fruit-enlarging period from June to August, mainly apply nitrogen fertilizer combined with phosphorus and potassium fertilizer. Apply 0.5 kg urea + 0.5 kg compound fertilizer per plant. Trees with heavy fruiting need more fertilization.
4. When should I apply harvesting fertilization for grapefruit trees?
Harvesting fertilization is usually applied in early November. Use 0.5 kg urea + 0.5 kg compound fertilizer + 5 kg cake fertilizer per plant, and supplement with potassium dihydrogen phosphate if necessary to help the trees recover promptly.
5. How should I water grapefruit trees after fertilization?
After fertilization, water the grapefruit trees appropriately to ensure proper nutrient absorption. Dig a circular pit around the trees, with a depth and width of one foot, then refill the soil after fertilization and watering.
