Why can't the roses, azaleas, and gardenias survive?
Are you curious about the introduction of the green plants and flowers that always fail to thrive, such as roses, azaleas, and gardenias? Let's take a look together.
Roses and azaleas can be said to be flowering machines, with very long blooming periods and numerous flowers, but many friends still can't keep them alive.
Often, customers come to the store to buy roses and say that the roses they bought before have died, and they are afraid they can't keep them alive! From these gardening friends, I have summarized several common mistakes that lead to the death of roses.
Roses withering
Roses are not drought-tolerant nor waterlogging-tolerant. Watering should be done when the soil is dry and then wet, and avoid watering randomly without considering the moisture level of the potting soil.
Many friends' roses die from overwatering, which causes the roots to rot and the plants to wither and die.
Roses with yellow leaves
Some friends find that their roses easily develop yellow leaves. The reasons for rose yellowing can generally be divided into several categories, and you can compare and adjust your own cultivation practices.
1. Overwatering - Roses are not tolerant of waterlogging, and excessive watering can cause root rot, leading to a large number of yellow and falling leaves. Water only when the potting soil is dry.
If you are used to using trays, develop the habit of pouring out the water in the tray after each watering.
2. Excessive drought - Some friends, having heard that roses should not be watered too much, dare not water them at all, or only water a little bit each time, leading to excessive drought and yellowing.
The yellowing starts from the bottom, with a large number of bottom leaves turning yellow and falling off. If the potting soil is dry, it is usually due to excessive drought or recent drought stress. Water promptly.
3. Poor ventilation - Good ventilation is very important when growing roses, as it can reduce the occurrence of diseases and pests. Poor ventilation can easily lead to black spot disease and yellowing leaves.
4. Lack of sunlight - Roses love sunlight and are positive flowers. Growing roses should ensure sufficient sunlight. Insufficient sunlight can also cause the leaves to lose color and turn yellow.
If you truly love roses, give them the best lit spot in your home.
5. Deficiency of nutrients - Potted roses are prone to nutrient deficiencies because they require a higher amount of some trace elements. When the potting soil is relatively simple, it is easy to have nutrient deficiencies.
When roses lack calcium, magnesium, or iron, they will develop yellow leaves.
It is recommended that when preparing the soil, the matrix should not be too single. Fertilizing should also use more organic fertilizers, and avoid using sandy soil to plant roses, as it easily leads to nutrient deficiencies.
Rose diseases and pests - Roses have many diseases and pests. In spring, aphids love the tender tips of roses, and in early summer, red spiders are fond of attacking them.
Prevention is better than cure for rose diseases and pests. Regularly spraying pesticides for prevention is more effective than treating after getting sick or infested.
Why can't roses, azaleas, and gardenias always survive?
You can start spraying dimethomorph and dinotefuran every half month from spring to prevent diseases and pests. For indoor cultivation, it is important to maintain good ventilation and apply more phosphorus and potassium fertilizers to enhance the plant's resistance.
Azaleas with yellow leaves - Azaleas have a long blooming period and many flowers, making them one of the easier-to-overwhelm flowers. While beautiful, they are not easy to grow and often have problems with yellowing and falling leaves.
The usual reasons for yellowing leaves in azaleas are:
1. Soil alkalization - Azaleas are typical acid-loving flowers. The potting soil is prone to alkalization, especially in the north, making it more challenging to manage.
Soil alkalization affects the absorption of iron ions in azaleas, leading to iron deficiency and yellowing leaves.
The symptoms of iron deficiency yellowing are that the tender leaves first lose their green color and turn yellow, followed by the leaf tips turning brown. The key to preventing soil alkalization is to add a little ferrous sulfate fertilizer to adjust the soil pH when watering regularly.