Are chrysanthemums greenhouse flowers?
When winter arrives, the colorful chrysanthemums always make people worried about their cold resistance. This plant, which has both ornamental value and vitality, shows different overwintering performances in different climatic regions. Mastering its temperature tolerance characteristics and maintenance skills is the key factor to extend the flowering period.
Regional climate determines maintenance methods
Necessity of greenhouse in northern regions
In the north of the Yellow River, the temperature often drops to -10℃ in winter, and the root system of chrysanthemums will suffer irreversible damage in frozen soil. Experimental data show that when the ambient temperature is continuously below -5℃ for 3 days, the plant cell sap begins to freeze, and brown frostbite spots appear on the leaves. It is recommended to move indoors before the first frost, maintain a temperature of over 15℃ to sustain slow growth, and scattered light from the windowsill can prevent excessive growth.
Possibility of outdoor cultivation in the Yangtze River Valley
In the Jiangnan region, the average temperature in winter is mostly above 0℃, and the outdoor plants can survive the winter with simple protection. Garden department practices show that covering a 5cm thick layer of pine needles can increase the surface temperature by 2-3℃, and choosing a planting site facing southeast can effectively resist the northwest cold wind. It is recommended to place potted plants against the wall to take advantage of the radiant heat from buildings to form a microclimate.
Refined overwintering management plan
Core parameters of water control
In a low-temperature environment, the transpiration is reduced by 70%, and the watering interval should be extended to 15-20 days. Use the bamboo stake test method: insert a 30cm bamboo stake 2/3 into the potting soil, and add a small amount of water when no soil adheres to it when pulled out. In northern heating indoor environments, attention should be paid to air humidity, and foliar spraying should be carried out on sunny mornings.
Innovative methods of physical protection
Are chrysanthemums greenhouse flowers?
Outdoor protection can adopt a three-layer wrapping method: the inner layer of non-woven fabric maintains breathability, the middle layer of foam board insulates, and the outer layer of waterproof film prevents moisture. The practice of flower farmers in Hebei has proven that this method can increase the temperature around the plants by 5-8℃. Temporary greenhouses can be set up during particularly cold waves, with built-in LED grow lights to maintain the photoperiod.
Special techniques for nutrient management
Applying phosphorus and potassium fertilizers 45 days before winter can enhance stress resistance, with an EC value controlled between 1.2-1.5mS/cm. Stop supplying nitrogen fertilizers to avoid frost injury to new shoots. For ground-planted plants, you can bury ripe bone meal along the drip line, which provides nutrients and improves soil structure.
By accurately judging the characteristics of regional climate and配合 scientific protective measures, chrysanthemums can safely overwinter in different environments. Northern flower enthusiasts should focus on ensuring proper temperatures, while southern growers need to pay attention to extreme weather conditions. Regardless of the maintenance method used, understanding the physiological needs of the plant is the key to success.