Will roses be killed by the sun in summer?

As the temperature is getting higher and higher, it is becoming more and more difficult to care for plants at home. Many friends will grow some roses at home, worrying that these roses will be killed by the sun in the summer. So will roses be killed by the sun in the summer? Let’s take a look below.

1. Will roses be killed by the sun in summer?

When the temperature exceeds 37℃ in summer, the rose will enter a semi-dormant state. Roses planted in the ground will be slightly better than those in pots , so we still need to pay attention to the maintenance of potted roses. In fact, the growth of roses will become slow after entering the summer, and pests and diseases are more rampant in summer. If you don't pay attention to maintenance, the roses may die. Although roses are plants that like light, they will not be killed by the sun if they are watered in time.

Roses that are not maintained in the shade need to be watered every day, or even once in the morning and evening, so that the evaporated water can be replenished in time. However, if you cannot guarantee timely watering during summer maintenance, it is recommended to maintain them in the shade. Roses do not need complete shading for shade maintenance. We generally use a shade net with a shading rate of about 50%. Shading can also lower the temperature of the potting soil, allowing the roses to safely spend the summer.

2. Key points for rose maintenance in summer

1. Heat insulation

The temperature of the flower pot can be lowered by using measures such as covering the pot with insulation, sticking insulation materials on the outside of the pot, and raising the pot. After summer, the high temperature and direct sunlight will cause the potting soil to overheat, which can easily cause burns to the capillary roots and absorption problems.

2. Pay attention to ventilation and appropriate shade

Although roses can withstand full-day sunlight, the strong sunlight in summer will still cause them to grow slowly. They can be placed on the edge of a tree's shade, with appropriate shade at noon and in the afternoon to ensure ventilation and light. You can also spray water on the ground around the flowerpot to increase humidity and reduce temperature and enhance air circulation.

3. Pay attention to watering and drainage

It rains continuously from July to August, so timely rain prevention and drainage are the key points in flower care. There should be no stagnant water in the pots, as too much water will easily cause root rot. The high temperature in summer has a strong transpiration effect. When the soil in the pot turns white, you should water it in time and water it thoroughly, avoiding the time when the midday sun is strong. For roses in small pots, you can use a deep pot tray and water them appropriately to avoid dry pots caused by strong transpiration. When watering, try not to splash water on the leaves to prevent diseases.

4. Pay attention to fertilization

The principle in summer is to apply small amounts of fertilizer frequently. Use liquid phosphorus and potassium fertilizers mainly, and apply less nitrogen fertilizers. Generally, apply once every 15-20 days. You can also combine it with foliar fertilization by spraying fungicides .

5. Pay attention to pruning

Usually, it is necessary to cut off the dead flowers, thin out the dense, dead and weak branches, remove the inner buds, clean the roots and fallen leaves to prevent the breeding of diseases and pests, combine pruning to reduce the height of the thick branches, and pay attention to leaving the height of the stump greater than 1cm and the direction of the cut buds during pruning.

6. Do a good job in pest control

As a famous medicine jar, the main treatment for rose diseases and pests in summer is sterilization and root rot prevention. Special attention should be paid to the occurrence and prevention of black spot disease and powdery mildew, scale insects, aphids, red spiders, etc. Among them, prevention and control is an effective means to ensure the health of leaves and roots. Many roses become bare after a summer, which is caused by the high incidence of black spot disease in summer. After being rained on, they should be sprayed with fungicides to prevent it. Another killer disease of roses is powdery mildew. To deal with the "two evils" of black and white, we must first solve the problems of ventilation and light transmission. We can use benzopyraclostrobin and flusilazole alternately every 5-7 days for 2-3 times in a row. If the amount of pests is small, use high-pressure water washing and an old toothbrush to remove them. If the amount is large, use imidacloprid, avermectin and other corresponding treatments.

That’s it