How to rescue a sago palm with yellowing leaves? Learn the right methods

Flowers & Gardening Jan 1, 1970 0 views

There are many reasons for yellowing leaves on a sago palm (Cycas revoluta). If it is caused by alkaline soil, you can water it with a ferrous sulfate solution; if it is caused by inappropriate light, you need to supplement or block light in time; if it is caused by inappropriate watering, make sure to water once in the morning and once in the evening in summer, and once every 10 days in winter; if it is caused by improper fertilizing, you need to fertilize scientifically, applying light fertilizer frequently.

1. Acidic solution

Cause: Sago palms need a slightly acidic environment to grow. If the soil is on the alkaline side, the leaves of the plant will turn yellow.

Solution: You can choose weakly acidic substances such as a 500-fold diluted ferrous sulfate aqueous solution to water and spray the plant, doing this once a week. After watering several times, you can gradually see results.

2. Sufficient light

Cause: Insufficient light leads to inadequate nutrition during the growing period, and the leaves shrink and turn yellow.

Solution: When sunlight is plentiful, expose the plant to filtered light; do not keep it growing in a semi-shaded or fully shaded state all the time.

3. Proper watering

Cause: Both overwatering and underwatering can cause leaves to turn yellow. If overwatered, the roots will lack oxygen and rot, and poor growth will cause stunting and yellowing; if underwatered, the plant will turn yellow from the bottom up, from old leaves to new leaves, due to lack of water.

Solution: Control the amount of water when watering. In summer, when water is lacking, water once in the morning and once in the evening; in winter, water about once every 10 days.

4. Scientific fertilizing

Cause: Both over-fertilizing and under-fertilizing can cause leaves to turn yellow.

Solution: When fertilizing, use a lower concentration and apply light fertilizer more often. If the concentration is too high or you fertilize too frequently, control the fertilizer and water in time; if you fertilize too few times, and the young leaves begin to turn yellow as they emerge, be sure to supplement fertilizer, but do not apply concentrated fertilizer.

5. Preventing and controlling pests and diseases

Cause: Pests and diseases such as red spider mites, scale insects, and yellow spots and yellow dots appearing on the leaves can also cause the plant's leaves to turn yellow.

Solution: Remove the diseased leaves, then promptly spray with agents such as carbendazim to sterilize.