How to raise gardenia? How often do you water it? What kind of temperature is suitable?

Gardenia, also known as Gardenia, is native to China. Gardenia leaves are evergreen all the year round, flowers are fragrant and elegant, with green leaves and white flowers, which are particularly beautiful and lovely. Suitable for terraced fields, Chi Pan, roadside planting, and potted plants in patios, courtyards and shady places, all of which grow well. You can also make flower beds and potted plants, and flowers can also be used for arranging flowers and wearing decorations. Gardenia likes warm, humid and sunny environment, is cold-resistant, semi-cloudy and afraid of stagnant water, and requires loose, fertile and acidic sandy loam.

1. Acid-loving soil: This flower needs scattered light, which is beneficial to acid fertilizer. Soil, water and fertilizer contain alkali, which prevents plants from absorbing iron and affects the formation of chlorophyll, resulting in withered branches, charred leaves and even death. Rich, loose and well-drained acid soil should be selected. If pine sawdust is fully mixed into the soil, the use effect is also very good.

2. Like cool: avoid exposure to the hot sun, but some people often mistakenly think that gardenia needs full shade, leading to cultivation mistakes. In fact, while paying attention to cultivating its cool environment, it is necessary to keep 60% light all day to meet its growth needs. In summer and autumn, it is necessary to prevent the sun from being exposed to the sun, so as to avoid the yellowing of the leaves and affect the viewing. April10-April 15, apply a thin fertilizer once, and don't water too much with buds. This kind of flower is afraid of waterlogging, and its leaves will turn black when waterlogged.

3. Humidity: If the air humidity is lower than 70%, it will directly affect the differentiation and growth of flower buds, but if it is too humid, it will lead to root rot, branches wither and leaves fall off. In addition to normal watering, the leaves and nearby ground should be sprayed with clear water frequently to appropriately increase the air humidity. If you have buds, don't water them too much, or they will fall off. Phosphorus and potassium fertilizer should be applied to sparse buds and prevent falling.

Generally, when the soil is dry, hit the clay pot by hand (like playing watermelon), and water it when you hear the empty sound until it leaks. The water for watering the flowers is tap water poured the day before, which has been left for a day and a night. The water is mixed with some rotten upper-layer fat water, rice washing water, lemon peel, broken bones, eggs and soybean milk. It smells a little bad, but it has been poured for a while.

4. Fertilizer-loving: Fertilizers such as cooked bean cake, sesame sauce residue and peanut bran should be applied, which can be acidic after fermentation and decomposition, but they must be applied thinly, avoid thick fertilizer and raw fertilizer, and do not apply fertilizer during hibernation. It is forbidden to use human excrement if it has been planted for less than three years. Too much nitrogen fertilizer will cause thick branches, large leaves and dark green, but it will not bloom. When phosphorus and potassium fertilizer are lacking, there will be no flowering or bud withering and falling off.

5. Thermophilic: The growing period is 18℃ to 22℃, and the wintering period is 5℃ to 10℃, and it is easy to be frozen below-10℃.

6. Timely pruning: Gardenia has strong germination, easy overlapping of branches, dense ventilation and scattered nutrition. In orthomorphism, three main branches should be selected according to the tree shape, and other branches sprouting from roots should be cut off at any time. After the flowers wither, the branches should be shortened in time to promote the germination of the new branches cut. After the new branches grow for three days, the core should be removed to avoid blind growth.

7. Prevent yellowing disease. There are four reasons: ① Iron deficiency. Excessive calcium, alkali, phosphorus and manganese in the soil will affect the absorption of iron by plants, affect the formation of chlorophyll, make the veins of young leaves turn green and spread the whole leaves. 1/500 ferrous sulfate water or 0.2% black alum water, once every 10 day. ② magnesium deficiency. Too much acid red loam and potassium and ammonium are prone to magnesium deficiency, which makes the veins of the lower old leaves turn green and yellow. It can be sprayed with 1% to 2% magnesium sulfate solution, but excessive magnesium application will cause calcium deficiency and hinder the development of xylem of roots and stems. ③ The basin soil is too wet or too dry. 4 exposure in summer.

8, breeding methods:

Commonly used cutting and layering propagation. Cutting, in the rainy season, the length of shoots is1500m, inserted into the seedbed, and roots are produced from 10- 12. Layering: biennial branches, 20-25cm long, are selected in April, buried in the soil, kept moist, rooted in about 30 days, separated from the mother plant in summer, and planted separately in the following spring. Transplanting seedlings or potted plants should be carried out in spring and rainy season, with soil balls. Keep the soil moist during the growing period, and water more during the flowering period and midsummer. Apply fertilizer 1 time every month, and apply phosphorus and potassium fertilizer 1 time before flowering. Prune and reshape in early spring of the following year, and cut off dead branches and long branches in time. Leaf spot disease and yellowing disease often occur in pests and diseases. Leaf spot was sprayed with 65% zineb wettable powder 600 times, and 0. 1% ferrous sulfate solution was regularly added with water to prevent yellowing. Insect pests are harmful to moth, scale insect and whitefly. Spraying 3,000 times of 2.5% dimethoate emulsifiable concentrate on the moth, and 40% dimethoate emulsifiable concentrate of 1.500 times of scale insects and whiteflies.