1, too much watering led to the yellowing of the mast flower leaves (water yellow): the sub-flower planting process of watering too much, then the young leaves will be dull, the old leaves will not be affected, but the leaves will be yellowish-green, and the new leaves will not grow.
Solution: the flowers off the pot in a ventilated cool place to be dry soil mass and then back into the pot. Lack of water when the tip or edge of the leaf withered, dry, old leaves from the bottom up yellow and fall off, the new leaf growth is more normal, this time should be watered, watered thoroughly.
2, long-term lack of water lead to mast flower leaves yellow (dry yellow): gardenia like water, in the south wind is relatively easy to grow, but, the north due to the relatively dry, air humidity is not enough, so it will cause the leaves withered yellow.
Solution: so, it is best to put the gardenia in a large tray, tray around watering, at the same time, pay attention to the foliage every day to sprinkle water, make the leaves fully moist. Specific about how often the gardenia watering, in fact, also depends on the situation.
3, poor ventilation leads to mast flower leaves yellow (burning yellow): Gardenia grows in an environment that needs ventilation and moist, bright light. If the windows are often left open, there will also be signs of yellowing of the leaf edges.
Solution: Remember to open the window every day for ventilation.
4, the temperature is too low to cause the yellowing of mast flower leaves: the temperature is too low can also cause yellowing of the leaves.
Solution: so in the breeding process of gardenia in winter should pay attention to frost protection, early spring and early winter night should also pay attention to keep warm.
5, mast flower fertilizer too much lead to leaf yellowing (fertilizer yellow): leaf veins lose green and become yellow, while the periphery is still green. There is also a sudden overall loss of green after fertilization leaves become dry and yellow, these are due to fertilizer fertilizer caused by fat yellow.
Solution: about gardenia what fertilizer is good, rotted human feces or cake fertilizer are good choice. Handle the fertilizer yellow method, so far there are only 2: big water irrigation root and take off the pot to wash the root.
6, mast flower fertilizer lack of yellow leaves (fertilizer yellow): fertilizer, fertilizer shortage will also cause yellow plants, such as iron deficiency, the leaves were yellowish or white, the veins are still green, this time to spray 0.2 ｛bf｝-0.5 ｛bf｝ ferrous sulphate water for prevention and control; magnesium deficiency, the first old leaves yellow, followed by the new leaves yellow, the veins are still green, this time to spray 0.2 ｛bf｝-0.5 à?￡bf｝ iron sulfate water for prevention and control; magnesium deficiency, first old leaves yellow, followed by new leaves yellow, the veins are still Green, then you can spray 0.7 ｛bf｝-0.8 ｛bf｝ boron and magnesium fertilizer to prevent and control.
7, improper lighting led to the yellowing of mast flower leaves: too much light, the sunrise part of the leaves appear yellow spots, then only need to move it to the shade of the maintenance can be restored, the new growth of the leaves will not have yellow spots. Insufficient sunlight, this time the leaves will turn yellow or even fall off.
Solution: just put it into the sun for supplemental sunlight.