Precautions for Growing Medlar Flowers:
1. Acidic Soil: Medlar flowers thrive in acidic soil, and if the soil becomes too alkaline, the plant may struggle to absorb iron, leading to chlorosis (yellowing of leaves). This can affect growth and even cause death. Use well-draining, loose, and fertile acidic soils. Adding pine bark or sawdust to the soil can improve its structure and acidity, which is beneficial for the plant’s health.
2. Light Requirements: While medlar flowers prefer partial shade, they still need about 60% of daily light. Many people mistakenly believe that they require full shade, which can lead to poor growth. Ensure a balance between cool conditions and sufficient light to support healthy development.
3. Humidity: The air humidity should be above 70% to support proper flower bud formation. However, excessive moisture can cause root rot and leaf drop. In addition to regular watering, misting the leaves and surrounding area with clean water can help maintain ideal humidity levels without overwatering the roots.
4. Fertilization: Use organic fertilizers like fermented soybean cake, sesame residue, or peanut bran. These provide nutrients while maintaining an acidic environment. Avoid using raw or concentrated fertilizers, especially during dormancy. Young plants under three years old should not be fertilized with manure. Overuse of nitrogen leads to lush foliage but no flowers, while a lack of phosphorus and potassium can result in weak buds or premature dropping.
5. Temperature: During the growing season, keep temperatures between 18°C and 22°C. In winter, the ideal range is 5°C to 10°C. If temperatures drop below -10°C, the plant may suffer from frost damage.
6. Pruning: Medlar flowers have strong growth, so regular pruning is essential. Select three main branches based on the tree shape and remove any unwanted shoots. After flowering, cut back the branches to encourage new growth. When new shoots grow to about three nodes, pinch them to prevent excessive elongation and promote bushier growth.
7. Preventing Yellow Leaves: There are four common causes of yellowing in medlar flowers:
1. Iron Deficiency: Alkaline or high-phosphorus soils can hinder iron absorption, causing yellow spots on young leaves. Apply 1/500 ferrous sulfate or 0.2% chelated iron every 10 days to correct this.
2. Magnesium Deficiency: Excess potassium or ammonium in acidic soils can lead to magnesium deficiency, causing yellowing of older leaves. Spray with 1–2% magnesium sulfate, but avoid overuse, as it can interfere with calcium uptake and root development.
3. Overwatering or Underwatering: Maintain consistent moisture without letting the soil become soggy or dry out completely.
4. Excessive Sunlight in Summer: Too much direct sunlight can scorch leaves. Provide some shade during the hottest parts of the day.
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