1, acidic solution
Reason: the growth of iron tree needs a slightly acidic environment, if the soil is alkaline, it will lead to plant leaf yellowing
Solution: you can choose 500 times ferrous sulfate water solution and other weak acidic substances watering spray, once a week, watering a few times, you can gradually see the results.
2, sufficient light
Reason: insufficient light will lead to insufficient nutrients during the growth period, the leaves shriveled and yellowed.
Solution: when the sun is full, the plant in the diffused light, do not have been in the semi-shade or full shade state growth.
3, proper watering
Reason: too much or not enough watering may lead to yellowing of leaves, if too much watering, will lead to root rot due to lack of oxygen, stagnation and yellowing produced by poor growth; hypothetically, not enough, the plant will be yellowed due to lack of water from bottom to top, from the old to the new leaves.
Solution: watering to control the amount of watering, summer water shortage to the morning and evening once, winter about 10 days once.
4, scientific fertilization
Reason: too much or too little fertilizer may cause yellowing of leaves.
Solution: fertilization should be lower concentration, thin fertilization, if the concentration is too high or fertilization is too diligent, this time to timely control of fertilizer, watering; if the number of times of fertilization is less, in the tender leaves out of the beginning of the yellowing, pay attention to make up for the fertilizer, but do not apply thick fertilizer.
5, pest control
Cause: red spider, shellfish, leaf yellow spots and yellow spots and other pests can also lead to yellowing of the plant's leaves.
Solution: remove the diseased leaves, and then use agents such as carbendazim to spray and sterilize in time.