When cultivating roses, attention should be paid to pot soil, temperature, light, watering, fertilization, etc. Precautions should include anti-freeze, pruning, potting, disease and insect pest control, etc.
1. Breeding methods
(1) Pot soil
For flower pots, just choose ordinary mud pots that are water-permeable and breathable. Before using a new clay pot, soak it with water and then use it. For newly cut seedlings, choose a small flower pot of about 15 cm. For rose seedlings that are 1 to 2 years old, choose a flower pot of 18-20 cm, and gradually increase the size according to the size of the plant. Roses prefer loose, well-drained soil and are afraid of drought or stagnant water.
(2) Temperature
The most suitable growth temperature for rose flowers is 18-20 degrees Celsius. Therefore, from April to May and September to October every year, the flowers will be larger and more colorful. Gorgeous. In high or low temperature environments, rose flowers will enter a dormant state, and the leaves may fall off at this time.
(3) Light
Rose is a sun-loving plant. It needs sufficient sunlight to grow. The lighting time should not be less than 5-6 hours a day. Generally, for the maintenance of potted roses, they must be Place it in a sunny place and provide shade and cooling in summer.
(4) Watering
Spring is the season when rose flowers sprout and grow branches, so the supply of water is very important. In March, when new leaves grow, water them once every two days, in the morning; in April, when the flower buds gradually form, water them once a day; in May, when they enter the flowering period, water them twice a day, usually once around 8 a.m. and once at 4 p.m. Click left and right to replenish water as appropriate according to the dryness and wetness of the pot soil. In other seasons, water according to the principle of "don't water if it's dry, water thoroughly".
(5) Fertilization
Fertilizer for rose flowers should be applied lightly and frequently. Before germination in spring, fertilize once, using decomposed bean cakes, etc. When the buds are ready to bloom, apply an additional layer of light liquid fertilizer. After the flowers fade in summer, apply a well-rotted liquid fertilizer.
2. Precautions
(1) Anti-freeze
Rose flowers can withstand low temperatures of -10 degrees Celsius. Generally speaking, potted roses in the south can be placed directly under the south-facing eaves for the winter, while potted roses in the north can be moved indoors to a ventilated place. In addition, when the temperature is very low in winter, you can water appropriately when it is slightly warmer to prevent the plants from freezing to death.
(2) Pruning
When the new rose branches grow to 15-20 cm, the top 3 cm need to be cut off. When the lateral branches grow to a certain extent, you can also perform pruning. If you repeat this process repeatedly, the rose plant will be plump and the flowers will bloom more.
(3) Potting
Potted roses all involve the issue of repotting and potting. Repotting is usually carried out in early spring before germination. Change a part of the new soil, water it thoroughly, place it in a cool place, and move it to a sunny place for maintenance after a week.
(4) Prevention and control of pests and diseases
When the environment is not well ventilated and the light is insufficient, rose flowers are easily disturbed by pests and diseases, such as aphids, powdery mildew, black spot, etc. Spray pesticides promptly when pests and diseases occur.