Chimonanthus praecox likes sunshine, is resistant to shade, cold and drought, and avoids waterlogging. Chimonanthus praecox is proudly open in frosty and snowy days, with yellow flowers like wax and fragrant smell. It is the main ornamental flower in winter. Afraid of the wind, it is cold-resistant, and it can safely overwinter when the temperature is not lower than-15℃. It can be cultivated in the open field in the south of Beijing, and the flowers will be frozen when the flowering period meets the low temperature of-10℃. It grows well on the slightly acidic sandy loam with deep, fertile, loose and good drainage, and does not grow well on the saline-alkali soil. Strong drought tolerance, fear of waterlogging, so it is not suitable for cultivation in low-lying areas. The tree has strong growth potential and vigorous branches, and the roots are easy to sprout. Resistant to pruning and easy to shape. Flowers bloom first and then leaves, and the flowering period is 1 1 month to March of the following year, and it matures in July and August.
2. Poinsettia, with cylindrical roots and many branches. Stems erect, height 1-3, diameter 1-4 cm, glabrous. Leaves alternate, ovate-elliptic, oblong or lanceolate, green, with entire margin or shallowly lobed or undulated, the leaves are pubescent or hairless, and the back of leaves is pilose; 5-7 bracts, narrowly elliptic, 3-7 cm long and 1-2 cm wide, usually entire, with few shallow wavy divisions at the edges, vermilion. Inflorescence with several cymes arranged at the top of branches; The involucre is altar-shaped, light green, with 5-lobed margin teeth, and the lobes are triangular and glabrous. Capsule, triangular and round, smooth and hairless. Seeds ovoid, gray or light gray, nearly smooth; No seed mound. Flowering and fruiting period 10 to April of next year. ?
3. Chrysanthemum, chrysanthemum is the third among the ten most famous flowers in China, one of the four gentlemen among flowers (Mei Lan Zhu Ju), and one of the four largest cut flowers in the world (chrysanthemum, rose, carnation and gladiolus), with the highest output. According to the cultivation form, it can be divided into many cultivation types, such as multi-headed chrysanthemum, single chrysanthemum, big chrysanthemum, cliff chrysanthemum, artistic chrysanthemum and desk chrysanthemum. According to the appearance of petals, it can be divided into garden hug, retreat hug, reverse hug, disorderly hug, open heart hug, flying hug and other cultivation types. Chrysanthemums in different types are named by various varieties. Chrysanthemum blooms from September to the twelfth lunar month.
4. Clivia, native to the tropical region of southern Africa, grows under trees, so it is neither afraid of heat nor cold, likes semi-cloudy and humid environment, and is afraid of strong direct sunlight. The optimum temperature for its growth is between 18-28℃, below 10℃ and above 30℃, and its growth is inhibited. Clivia likes ventilated environment, likes deep, fertile and loose soil, and is suitable for growing in loose and fertile slightly acidic organic soil. Clivia is a famous greenhouse flower, which is suitable for indoor culture. Berries are purplish red and broadly ovoid. The flowering period is from New Year's Day to Spring Festival, mainly in spring and summer. It can bloom all year round, sometimes in winter, and also in June and July in summer. The fruit ripens in about 10 month, and belongs to berries, with purple color. Flowers and leaves are beautiful.