Why Don't Camellia Buds Bloom
Camellias with full buds that refuse to bloom puzzle many flower enthusiasts. As one of China's top ten famous flowers, the blooming period of camellias requires special techniques. We will delve into this classic problem困扰ing flower growers from three dimensions: nutrient supply, light control, and temperature management.
Stunted Development Due to Insufficient Nutrient Supply
Soil Nutrition Imbalance Affects Blooming
Camellia buds require a surge in phosphorus and potassium during the bud formation stage. When the nitrogen content in the soil is too high, it continuously stimulates the growth of branches and leaves, inhibiting the differentiation of flower buds. It is recommended to supplement with potassium dihydrogen phosphate solution (0.2% concentration) every 10 days, combined with the application of slow-release fertilizers like bone meal.
Timing and Ratio of Top-dressing
Apply high-phosphorus water-soluble fertilizer at the initial stage of bud formation and switch to potassium-based fertilizers during the bud expansion stage. Be particularly careful to avoid using uncomposted organic fertilizers, as the heat they generate can burn new roots.
Improper Light Control Causes Bud Drop
Control of Light Intensity and Duration
Bud development requires at least 4 hours of scattered light daily, with 40% shading during the midday intense sunlight period. In the northern regions, additional lighting can be used to extend the light duration to 10 hours, while in the south, it is important to avoid west-facing exposure that can cause burning.
Adaptation to Sudden Light Changes
Plants that are chronically shaded and suddenly exposed to strong light can lead to dehydration and withering of the buds. A gradual transition should be used, increasing light intensity by 1 hour each day for 7 days to complete the adaptation process.
Temperature Fluctuations Affect the Blooming Process
Precise Control of Day-Night Temperature Difference
The ideal blooming temperature should be maintained between 12-18°C, with day-night temperature differences controlled within 5°C. During the heating season in the north, it is necessary to keep the plants away from radiators, while in the south, temporary insulation shelters can be set up with plastic film during cold spells.
Vermination and Blooming Control
Some camellia varieties require about 30 days of 5°C low-temperature vermination to bloom normally. This vermination environment can be simulated using the refrigerator cold storage method, but it is important to maintain the substrate slightly moist.
Mastering the three core elements of camellia bud care can solve the problem of buds not blooming. It is recommended to regularly check the EC value of the potting soil and use a thermometer and hygrometer to monitor environmental data. If persistent bud drop occurs, try cutting off 1/3 of the buds to concentrate nutrients. Flower enthusiasts are welcome to share their camellia care experiences in the comments section.