What to Do When Rose Leaves Turn Yellow? Causes and Solutions

Friends who grow roses at home may sometimes encounter yellowing leaves on their roses, so what should be done when rose leaves turn yellow?

Rose leaves turn yellow for the following reasons:

1. Overwatering; when watering, follow the principle of watering thoroughly only after the soil has dried out.

2. Too little light; generally more than 6 hours of light is needed for green leaves and bright flowers.

3. Poor air circulation; a dry, stuffy environment makes leaves wither and yellow, and makes the plant prone to powdery mildew.

4. Indoor temperatures that are too high or too low.

5. Insufficient nutrients; roses love fertilizer, so apply dilute fertilizer frequently, otherwise the leaves turn yellow and the plant will not bloom.

6. Improper fertilizing; applying fertilizer that is too concentrated or unrotted organic fertilizer causes "root burn" and leads to withering and yellowing.

7. The soil should be loose and fertile; poor drainage and compacted soil cause leaves to turn yellow and can even kill the plant.

8. Pests. Damage from pests such as red spider mites and scale insects can also cause leaves to wilt and yellow.

Notes on growing roses:

1. Soil. Potted roses are best grown in sandy soil rich in humus and slightly acidic and fertile; alkaline soil should not be used. Before new buds break each spring, replace the potting soil once to encourage vigorous growth; changing the soil helps the rose bloom that same year. Roses can be grown in flower pots of various materials, and clay pots are of course also fine.

2. Light. Roses love light, and during the growing season they need plenty of sunlight, at least more than 6 hours of light per day; otherwise they will only grow leaves and not bloom, and even if buds form, the flowers will be neither brightly colored nor fragrant after blooming.

3. Watering. Watering roses requires care: let the soil dry before watering and water thoroughly when you do, and do not water while the soil is still wet. Roses are afraid of waterlogging, so there must be no standing water in the pot, as too much water easily causes root rot. In midsummer, water once a day; water as soon as the surface of the potting soil turns pale. During the winter dormant period, be sure to water less and keep the soil only half moist.

4. Overwintering. In winter, if you have the means to keep the plant warm at home, it is best to keep the room temperature above 18°C and provide more than 6 hours of light each day. If there are no warming measures, then just let it go dormant naturally. Around the Start of Winter, after the leaves have fallen, keep only 5 cm of each branch and cut off everything above 5 cm, then place the pot in a cool, shaded spot at around 0°C. The potting soil should be on the dry side, but not excessively dry, to prevent the plant from drying out and dying.

5. Fertilizing. Roses love fertilizer. Potted roses should be fertilized frequently; during the growing season, apply diluted liquid fertilizer once every ten days. No matter which fertilizer you use, remember not to overapply it, to prevent fertilizer burn that harms the young plants. However, do not fertilize during the winter dormant period.

6. Pruning. After flowering, cut off the withered flower buds. When rose buds first appear, choose one well-shaped bud to keep and cut off all the rest. The goal is to leave only one bud per branch, so that the flowers will bloom full and brilliant in the future, with large blooms and a rich fragrance.

7. Ventilation. Whether growing in a courtyard or on a balcony, be sure to pay attention to ventilation. With good ventilation, roses can grow strong and healthy, and the occurrence of pests and diseases can also be reduced.

8. Temperature. Roses naturally prefer a cool and warm climate and are afraid of high temperatures. The most suitable temperature is 18°C---28°C; when the temperature exceeds 32°C, flower bud differentiation is inhibited. Therefore, in the hotter midsummer, roses usually do not bloom, and even if there are a few flowers, they are far inferior to those under normal temperatures. During high temperatures, the pot can be moved to a cool, shaded place for care.