1, temperature: Pteris edulis is an evergreen shrub. Like warm, humid and semi-cloudy environment. Cold tolerance is a little poor, not resistant to strong light exposure, afraid of waterlogging, suitable for fertile, loose and well-drained loam. The temperature in winter is not lower than 0 degrees.
2, lighting: like light, slightly resistant to shade, like warm and humid climate. I like humidity and warmth, and I also like semi-ventilation and semi-shade. You should move to a sunny place indoors in winter. Phoenix-tailed bamboos like the land of sunny Gao Shuang, and there is a saying that "the sun is lush and it is suitable to plant a high platform"; In spring, summer and autumn, it only needs to be placed in a ventilated place in the window, and it can grow well in the sunny place in winter. The ground-planted Pteris edulis grows new leaves after spring (this is a reflection of cold), but it is common in warm places all the year round.
3. Soil: Eichhornia crassipes likes acidic, slightly acidic or neutral soil, and the appropriate pH is pH4.5 to 7.0, avoiding sticky and alkaline soil. The soil in the north is very alkaline, and 0.2% ferrous sulfate can be added. The best soil is loose and fertile sandy loam with good drainage, and red and yellow soil, humus soil and fine sand can be mixed with farmland soil. If Phyllostachys praecox is planted in ordinary pot soil, the survival rate is low, and vermiculite or peat mixed with perlite can be used as matrix, and the survival rate is high. In order to maintain a beautiful posture, the requirements for soil are not high, and generally loose sandy soil is fine.
4. Moisture: The phoenix bamboo likes to be wet and is afraid of water accumulation. Water should be poured thoroughly for the first time after the pot is filled, and then the pot soil should be kept wet. Do not water it too much, otherwise it will easily rot the whip and root. Water is often sprayed on the leaves from the pot loading to the survival stage. If the basin is short of water, the bamboo leaves will curl. At this time, they should be watered in time, and the bamboo leaves will unfold again. Water once every 1 2 days in summer, and water less in winter, but make sure the basin soil is moist to prevent "dry freezing".
5. Fertilizer: the fertilizer of Pteris edulis is mainly organic fertilizer, and it can be decomposed animal manure, garbage fertilizer and river mud. Organic fertilizer is mainly used as base fertilizer, which is mixed into the basin soil for use, and the dosage is generally 10% to 15% of the basin soil. It is only necessary to apply 1-2 times of thin nitrogen fertilizer every month during the growth period of Eichhornia.
What should I do if the leaves of Phyllostachys edulis turn yellow?
(1) Too much watering and long-term over-wetting of the basin soil will lead to lack of oxygen in the soil, make some fibrous roots rot, hinder normal respiration and absorption of water and nutrients, and cause leaves to turn yellow and fall off. After the injury, the young leaves first turn pale yellow, and then the old leaves gradually turn yellow. We should immediately control watering, suspend fertilization, and often loosen the soil to make the soil well ventilated.
(2) Drought dehydration. Water leakage or long-term watering of flowers (that is, wet on the top and dry on the bottom) will affect nutrient absorption, and it is also easy to cause the leaves to be dull and drooping. First, the old leaves in the lower part aged, and gradually withered and fell off from bottom to top. At this time, it is necessary to water a little and spray water to make it gradually recover before turning to normal watering.
(3) Long-term fertilization. Long-term failure to apply ammonia fertilizer or change pots and soil, lack of nutrients such as nitrogen in the soil, resulting in thin branches and leaves, thin and yellow leaves. It is necessary to dump the pots in time, change into new loose and fertile culture soil and gradually apply thin and decomposed liquid fertilizer or compound flower fertilizer.
(4) Overfertilization. If too much fertilizer is applied, the new leaves will be thick and uneven, and the old leaves will be brown and fall off. Therefore, the fertilization should be stopped immediately, and the amount of water should be increased to make the fertilizer flow out from the drainage hole at the bottom of the basin, or the basin should be emptied immediately, and the soil lump should be washed with water and then replanted in the basin.
(5) hot and high temperature. In summer, if flowers with cool sex (such as cyclamen, upside-down golden bell and begonia all year round) are placed in a high temperature place to be directly exposed to strong light, it is easy to cause the tip and edge of young leaves to scorch or the leaves to fall off. Need to move to a well-ventilated shade in time.
(6) Excessive shading. If the sunshine-loving flowers are placed in shady places or places with insufficient light for a long time, the branches and leaves will grow in vain, the leaves will be thin and yellow, and they will not bloom or rarely bloom. Pay attention to move the flowerpot to the sunny place.
(7) Soil and water are alkaline. Soil and water in most areas in the north contain more saline-alkali. When planting flowers that like acid soil, such as rhododendron, camellia, Michelia, gardenia, orchid, magnolia, osmanthus, etc., the leaves will gradually turn yellow due to the lack of soluble iron and other elements that can be absorbed by the soil. Acidic soil should be used when planting, and alum fertilizer water should be often poured during growth.
(8) Dense ventilation. If too much nitrogen fertilizer is applied, the branches and leaves will grow luxuriantly, and if they have not been pruned for a long time, the light of the branches and leaves in the inner chamber will be insufficient, which will easily cause the leaves to yellow and fall off. Fertilization should be reasonable and pruning should be strengthened to make it ventilated and transparent.
(9) air drying. When the indoor air is too dry, some flowers that like humid environment, such as chlorophytum and orchid, often have the phenomenon of dry tip or scorched leaf edge. Attention should be paid to increasing air humidity by spraying water and covering with plastic film.
(10) Improper temperature. When the room temperature is too low in winter, flowers that like high temperature are often vulnerable to cold damage, which leads to yellowing of leaves, and when it is serious, they die of yellowing. If the room temperature is too high, the transpiration of plants will be too strong, and the water and nutrients in the roots will be in short supply, which will also make the leaves yellow. Please pay attention to adjust the room temperature in time.
(1 1) The soil is slightly acidic. The red loam in the south is acidic, and magnesium is easy to be lost. Flowers and trees planted with alkali-resistant or slightly sealed soil, such as oleander, boxwood and Yingchun, are often prone to lose green and yellow between the veins of old leaves. Calcium magnesium phosphate fertilizer or magnesium sulfate solution can be applied.
(12) pests and diseases. Leaf spot disease caused by fungi and other pathogens is easy to cause local necrosis of leaves and yellow spots or patches. In severe cases, the whole leaves turn yellow and fall off, and mottles embedded in yellow and green appear on the leaves after being infected by mosaic virus. Suffering from scale insects, red spiders, etc., the leaves will also become local yellow and withered, or even the whole leaves will yellow and fall off. All should be sprayed in time to prevent and control.
(13) Strong stimulation. Excessive concentration of pesticides used in pest control, or pollution by toxic gases in the atmosphere, or sudden watering of cold water when the temperature is high, are easy to cause local yellowing and scorching of the leaf tips or leaves, and even the whole plant dies.