Pot planting technique of family dragon boat

The dragon boat flower is an evergreen shrub or small tree of the genus Rubiaceae. Leaves oval thin leathery, entire, flowers terminal, umbels, petals 4, aggregated, white, red, pink and other colors.

1. Potted soil

The cultivated soil should choose slightly acidic humus loam, which can be disinfected after mixing with humic leaf soil, pastoral soil and coarse river sand at 2:1:1.

2. Light and temperature

Dragon boat flowers like light, but avoid bright light. It should be placed in the leeward and sunny place in spring and autumn and under the shade in summer. Due to the soft light in winter, it is fully exposed to light. Dragon boat flowers like a warm environment and keep it between 12 ℃ and 18 ℃ indoors in winter. Do not leave the room until Qingming Festival in spring, and enter the room in time when it is less than 15 ℃ in autumn.

3. Watering and fertilizing

Dragon boat flowers like a wet environment, but are afraid of stagnant water. Water can be watered every 3 days in spring and autumn, and once in the morning and evening in summer. In order to maintain high humidity, the leaves of plants should be sprayed frequently in summer and should not be watered on cloudy and rainy days. In case of rain, the water in the basin should be poured out in time to prevent water from rotting roots. The water in the north is alkaline, and long-term use of plants is easy to get chlorosis, which can be watered with Rain Water and snow water, or ferrous sulfate. Dragon boat flowers like fat, but avoid thick fertilizer and raw fertilizer. During the growing period, nitrogen, phosphorus, potassium, ferrous sulfate and horseshoe slices can be applied once every half a month to add water and liquid fertilizer after ripening and fermentation.

4. Change the basin and trim

The dragon boat flower usually changes the basin every two years, and the best time to change the basin is in early May. When changing the basin, cut off the old root of the plant properly, make the drainage layer and add an appropriate amount of cultivated soil, and apply some horseshoe slices as base fertilizer. The pruning of dragon boat flower is generally carried out after coming out in spring, mainly to properly thinning the branches of the plant to facilitate ventilation, and if there are fewer branches, the main branches should be strongly cut to make it produce more lateral branches. The disease and insect branches, dead branches and drooping branches should also be cut off in time. In addition, if the heart is picked properly during flowering, it can be pregnant with buds and bloom.

5. Disease and pest control

The main diseases are anthracnose and coal fouling. If they occur, in addition to strengthening ventilation and water and fertilizer management, carbendazim 800 times solution can be sprayed for control. Insect pests include shell insects, red spiders and aphids. If they occur, they can be killed manually when they are small in number and sprayed with 1000 times omethoate EC when the number is large.

6. Methods of reproduction

Cuttings are better for the propagation of dragon boat flowers, which are not only easy to survive but also blossom quickly. Two-year-old and woody branches can be selected in March or April every year, cut into 15cm long, inserted into sterilized sand, placed in shade, and covered with plastic sheeting to protect moisture. Spray water once a day, keep the humidity at about 70%, and take root about 35 days after cutting. After the cuttings grew new buds, the cuttings were gradually exposed to light, and after 60 days, the seedlings could be transferred to the pot and entered the normal management.

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