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In the process of growing flowers, many gardeners often wonder why their plants don’t bloom as long as others. The answer lies in a few clever techniques that can help extend the flowering period.
First, increasing the temperature is key. Flowering depends on both internal flower bud development and external environmental factors like temperature and light. For example, spring-flowering plants such as peaches, camellias, wisteria, plums, forsythia, clove trees, yellow jessamine, peonies, rhododendrons, and more usually complete their flower bud differentiation in early winter. However, they remain dormant due to cold temperatures. By gently raising the temperature, these plants can be encouraged to bloom during the Spring Festival or Lantern Festival season.
To raise the temperature at home, place the flower pot on a sunny windowsill. At night, move it about one meter away from heat sources. Another effective method is to cover the plant with transparent plastic film, leaving a small slit for ventilation. Remove the cover at night to avoid overheat.
Second, controlling light exposure can also influence blooming. Short-day plants require less than 12 hours of sunlight per day to form flower buds. By shading the plant and limiting daily light exposure to 9–10 hours, you can encourage earlier blooming.
Third, using plant growth regulators can significantly enhance flowering. These substances promote flower bud formation and increase the number of blooms. For instance, applying a 0.05% to 0.1% solution of gibberellin to jasmine, white magnolia, camellia, and peony can lead to earlier flowering. Tea plum and white magnolia may bloom 1–2 months ahead, while camellias can bloom 2–3 months earlier. Some plants, like the peony, may even flower 5–6 months in advance. Spraying a 0.002% gibberellin solution on the buds can trigger new inflorescences within 4–5 days.
When using growth regulators, ensure the plants are healthy and well-watered. Proper fertilization and good air circulation are also essential for successful results. With these techniques, you can enjoy longer and more vibrant blooms throughout the season.