How to raise catalpa flowers?

First, acid soil culture, gardenia needs scattered light, so it likes acid soil. If the soil is alkaline, gardenia can't absorb iron well, which has a great influence on the formation of chlorophyll and further causes the flower branches to wither or even die. Therefore, the soil must be loose and fertile acid soil, and some substances with this effect can also be added.

Second, put it in a cool place. Gardenia must not be exposed to the hot sun, otherwise it will lead to yellow leaves, but it does not mean that it should be placed in the shade, because it has a certain demand for light, and it is best to keep it under 60% light every day. In addition, after entering April, fertilization should be carried out twice a month.

Third, the air humidity, gardenia likes humidity, so the air can't be too dry. According to experts' statistics, if the air humidity is lower than 70%, it will affect the normal opening of flowers, but if it is too humid, it will lead to root rot and yellow leaves. Therefore, in addition to normal watering, we should always spray clean water nearby. Another problem that should be paid great attention to is that water should not be poured too much, otherwise it will affect growth. So how should gardenia be watered?

A. when you see the soil dry, knock on the flowerpot with your hand. If there is a free sound, you need to water it. When the bottom of the flowerpot starts to leak, stop. It is best to add some eggs and soybean milk to the water, which is more conducive to growth.

Fourth, the key to fertilization, gardenia likes fertilization, but it can't add too much fertilizer at one time. It must be applied thinly and more fertilizer. It must not be greedy and save trouble, otherwise it will cause thick branches, large leaves and thick green, and lose its own appreciation effect.

Fifth, the temperature requirement, gardenia growth temperature should not be too low, because it likes temperature. Generally speaking, the temperature during the growing period is 18 to 22 degrees, and it is 5 to 10 degrees in winter. Frostbite will occur below-10 degrees, and special attention should be paid to the north.

Sixth, proper pruning, gardenia is very easy to grow luxuriantly, and it will cause a dense and messy feeling, which will cause scattered nutrition and poor ornamental value. Therefore, it must be pruned. When pruning, it is best to choose three main branches, cut off roots and tillers at any time to sprout new branches, and cut short branches in time after flowering, so that new branches will sprout where they are cut. When a new branch grows three nodes, it should be cored to avoid blind growth.

Seventh, disease prevention. Generally, gardenia has four diseases:

A, iron deficiency, this is the most common one, iron deficiency will cause the formation of chlorophyll, and then make the leaves lose their green. At this time, ferrous sulfate water and low-concentration black alum water can be used three times a month.

B, magnesium deficiency, magnesium deficiency will lead to yellow veins of the lower old leaves of Gardenia, so it should be sprayed with low concentration magnesium sulfate solution.

C, the soil is too wet or too dry, this can be seen in the third point.

D, sun exposure, this can refer to the second point.

Eighth, breeding methods, gardenia generally has two breeding methods: cutting and layering.

A. Cutting: In the rainy season, the shoots with the length of 15cm are inserted into the seedbed, and 10- 12 takes root.

B, in April, biennial branches with the length of 20-25cm are selected, buried in the soil and kept moist. After about 30 days, they will take root, be separated from their mother plants in summer, and be planted separately in the following spring.