What to do if the leaves of Asparagus japonica turn yellow
Gardenia jasminoides (scientific name: Gardenia jasminoides) is loved for its white and fragrant flowers and emerald green leaves, but the leaves often turn yellow during maintenance. The following are the reasons and solutions for the yellow leaves of Asparagus that have been hotly discussed on the Internet in the past 10 days. We will analyze them in detail based on structured data.
1. Common causes of yellowing of the leaves of Asparagus japonica
| Reason type | Specific performance | frequency of occurrence |
|---|---|---|
| Improper watering | Leaf tips turn yellow (dehydration) or overall yellowing (water accumulation) | 35% |
| nutritional deficiencies | Uniform yellowing of old leaves (nitrogen deficiency) and interveinal yellowing (iron deficiency) | 28% |
| Lighting problem | Burnt by direct sunlight or long-term shade causing yellow leaves | 20% |
| Soil alkalization | New leaves turn yellow and grow stagnant (pH value is too high) | 12% |
| pests and diseases | There are red spider mites on the back of the leaves or lesions on the leaves | 5% |
2. Targeted solutions
1. Scientific watering:Keep the soil moist but not waterlogged. It is recommended to use the "finger test method" (water when inserted 2cm into the soil and it is dry). Watering can be done every 2-3 days in summer and extended to 5-7 days in winter.
2. Nutritional supplement plan:
| Type of deficiency | Remedies | Effective cycle |
|---|---|---|
| Nitrogen deficiency | Apply urea (1:1000 dilution) or decomposed cake fertilizer | 7-10 days |
| iron deficiency | Spray chelated iron (0.1% concentration) or ferrous sulfate | 3-5 days |
| Comprehensive deficiency | Apply gardenia-specific fertilizer every month (N-P-K=15-5-10) | Continuously effective |
3. Lighting management:Ensure 4-6 hours of scattered light every day in spring and autumn, 50% shading in summer, and full sunshine in winter. If sunburn has occurred, move to a shady location immediately and trim damaged leaves.
4. Soil improvement:Check the soil pH regularly (ideal range is 5.0-6.5). If it is alkalized, water it with alum fertilizer (ferrous sulfate: cake fertilizer: water = 1:3:100) once a month.
3. Advanced maintenance skills
1. Preventive spraying:During the period of high incidence of pests and diseases from May to September, spray abamectin (2000 times solution) once every half month to prevent red spider mites.
2. Pruning timing:Prune immediately when yellow leaves are found, and cut branches promptly after flowering to promote the germination of new shoots. Note that the cut should be at least 0.5cm away from the bud point.
3. Environmental control:Keep the air humidity at 60%-70% and humidify it by spraying (avoid spraying the buds directly). The room temperature should be maintained above 10℃ in winter.
4. Correction of common misunderstandings
| Wrong approach | scientific explanation | correct alternative |
|---|---|---|
| Fertilize liberally after yellow leaves | May cause obesity and accelerate death | Diagnose the cause first and then make targeted supplements |
| water with tea | Theophylline increases soil pH | Use fermented rice water instead (1:10 dilution) |
| All-day shade maintenance | leading to insufficient photosynthesis | Ensure at least 3 hours of scattered light every day |
Through the above systematic diagnosis and maintenance measures, most yellow leaf problems of mastia can be significantly improved within 2-4 weeks. It is recommended to develop the habit of regular observation, detect early and deal with it early, so that your mastia will remain green and healthy all year round.
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