Boston fern is a perennial evergreen fern, which is native to tropical and subtropical regions and distributed in Taiwan Province Province, China. It belongs to perennial evergreen ferns. Rootstock erect, with stolons. The leaves are clustered, and the length can reach more than 60\r\ncm. The leaves are slender and compound, drooping after unfolding, and the leaves are bipinnately divided, with ear-shaped deflection at the base of the spire. Sporocysts are semicircular and are born on the back of leaves near the edge of leaves. \ r \ This plant is a drooping fern foliage plant, which is suitable for indoor hanging and viewing, and its creeping branches can be used as decorative materials. Growth habit editor \ r \ Sex prefers warm, humid and semi-cloudy environment, but also likes ventilation and avoiding extreme heat. Cultivation technology editor \ r \ In general, it should be cultivated indoors under bright and scattered light, not under direct light, but also in the dark. The optimum growth temperature is 15~25℃, and it can safely overwinter above 10℃ in winter. \ r \ Although it is drought-tolerant, it still needs sufficient moisture, and it is not advisable to be too wet or too dry. Pot soil should always be kept moist. Water 1~2 times a day in summer, and often spray water on the leaves. \ r \ Don't need too much fertilizer, just apply thin and decomposed cake fertilizer every 4 weeks during the growing period. It is not advisable to use quick-acting chemical fertilizer, and do not pollute the leaves when fertilizing to avoid damage. \ r \ Potted plants should use mixed culture soil of humus soil, river sand and garden soil, and they will grow better if conditions permit. Change pots every other spring. \ r \ nFor outdoor cultivation of Boston fern, about half (volume ratio) of expanded plastic artificial soil can be mixed into common cultivation soil and mixed evenly. \ r \ Indoor potted plants can be made of light, clean and sanitary pure expanded plastic artificial soil. Boston fern should be cultivated in a shaded shed. It is best to cover it with a colorless film, which can prevent rain and direct sunlight. Water once a day during the growing period, and use drip irrigation to prevent the leaves from yellowing, rotting and dripping. In summer, you can also spray water around potted flowers to improve humidity. Water should be properly controlled and kept moist in winter. Nitrogen fertilizer must be topdressing in the growing period. Outdoor cultivation, applying \ r \ N2 \ r \ nDilute organic fertilizer water every month to avoid polluting the leaves; For indoor cultivation, Zuoji can supplement nitrogen-based nutrient solution every \r\n2\r\n months. In order to ensure the beautiful plant shape and promote air circulation, the withered and yellow old leaves should be cut off in combination with plastic surgery. [1] \ r \ nCultivated variety \ r \ nDryopteris tenuifolia leaves are slender, Dryopteris crassifolia leaves have coarse serrations at the edges, and Dryopteris coronaria leaves. \ r \ nPlanting technology \ r \ nProduction standard: 18cm pot, height 30-40cm, crown width 60cm, growth period 10 month. \r\n Substrate preparation: use loose imported peat with good drainage and air permeability, Pinshi 10-30mm, break the peat and add water to mix well (standard of adding water: hold a handful of peat with your hands after mixing well, and water will seep through your fingers), and then plant it in a cup. The amount of peat in 12cm pot is about \ r \ n350ml, and a pack of 300l imported peat can hold about 800 cups. \ r \ Potting requirements: Select high-quality seedlings produced professionally, with a height of 7-8cm and a crown width of 4-5cm, free from plant diseases and insect pests, dead leaves and yellow leaves. \ r \ Potting: First plant in a pot with the size of 12cm, 1 ball/pot, and plant for 3-4 months. Then replace it with a pot of 18cm, plant it for 6-7 months before shipment. \ r \ nDaily maintenance \ r \ nWater and fertilizer management: Boston fern should keep the basin soil moist and have sufficient water supply during the growing season. Although the soil should be kept moist, the leaves at the bottom of Boston fern will wither and fall off if it is often dry. \ r \ Temperature management: The suitable temperature of Boston fern is 18℃~35℃, and it will not grow well above 35℃ or below 15℃. It shall not be lower than 5℃ in winter, and heating equipment is needed for winter maintenance. If heating facilities are not used, double insulation facilities can be used, and the shed should be closed in time when the temperature drops to 22-24℃ in winter afternoon. Summer maintenance requires cooling equipment (exhaust fan and water curtain). If there is no heating and cooling equipment, shading and ventilation should be strengthened at noon in summer to replenish foliar water and surface water to achieve the purpose of cooling. At the same time, long-distance multi-span greenhouses should not be used, but independent single ceiling should be used. \ r \ Humidity management: I like high humidity environment, but I can't stand dryness. During the maintenance period, Qin Ying will humidify the plants and the growing environment by spraying water, and the suitable humidity is about 75%-80%. If it is too dry, it will cause the leaves to wither and yellow, or even the whole leaves will wither and yellow. \ r \ Lighting management: Boston fern, which likes warm and semi-cloudy environment, is suitable for scattering light, and can't let direct sunlight, otherwise it will wither and curl easily. It is more suitable for the growth of seedlings to control the light in 2000-3000Lux 15 days after planting, and the overall light in the first month after planting is 3000 \ r \ n-. After the second planting. It is more appropriate to control the overall illumination at 5000-6000Lux next month. It is more appropriate to control the overall illumination at 7000-8000Lux. Winter can be controlled at 10000- 15000Lux according to the actual situation. Too strong light will cause the leaves of plants to burn and fall off, the leaves will shrink and the growth will be hindered. \ r \ Fertilizer: Use 20-20-20 water-soluble fertilizer, calcium nitrate and potassium nitrate. \ r \ nPropagation \ r \ nBoston fern does not produce spore leaves, but can only propagate through ramets or stems. It can be done every year, especially in spring and autumn. After dividing plants, watering them with permeable water and keeping them in the shade can quickly restore their growth. \ r \ nIt is usually propagated by dividing plants. In summer, small plants with roots from creeping branches are cut from robust plants and planted separately. \ r \ nThe main pests and diseases are leaf spot and damping off. Pests are mainly caused by caterpillars, scale insects, mealybugs and nematodes.