The Sword of São Jorge is known for being a resistant and easy to maintain plant, but that does not mean that it is immune to problems. If the leaves began to turn yellow, there may be several reasons behind the change, from errors in watering to lack of nutrients or excess sun.
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07/07/2026
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A Sword of São Jorge (Dracaena trifasciata, formerly Sansevieria trifasciata), is one of the most resistant indoor plants, which also makes it one of the most popular.
Even if it's easy to treat, there are mistakes that might question it and leave it with the yellow leaves.
Southern Living gives nine reasons.
1. Inconsistent watering
“Irregular irrigation can leave the yellow leaves and plant under stress,” noted Raffaele Di Lallo, founder of Ohio Tropics. I mean, you can't just water when you remember.
On the other hand, it is not appropriate to water too much either, because this could damage the roots. Whenever watering, make sure the water flows through the drainage holes.
2. Overwatering
As previously said, excessive watering is a common mistake and it calls into question the balance of the Sword of St George. “The roots of the plant absorb moisture and the leaves release it through the perspiration process,” Hancock explains.
A good watering is to let the surface layer of the soil dry before watering the plant again. “After watering, wait at least until the first two or three centimeters of the soil dry before watering again,” Di Lallo advises.
3. Root rot
If you suspect your plant is suffering from root rot, check the roots first. “Do not assume that your plant has root rot until it is removed from the vessel and the roots are observed,” notes Di Lallo.
The most common signs are soft roots and a strange odor, indicate experts. If that is the case, then just let it dry outdoors for a couple of days and put it in the vase again.
4. Lack of water
Lack of water is also a common problem. Many people, afraid to pour too much water, may eventually leave the plant dehydrated. When he does not receive enough water, St. George's sword begins to wither and the flowers dry.
5. Extreme temperatures
A sudden change in temperature can negatively affect these plants. “The thermal stress can also make the leaves yellow,” notes Hancock. You should be careful of extreme temperatures, either in summer or winter.
6. Excess sunlight
The sword of St. George is a plant that likes sunlight, although it is said that it adapts in places with little light.
It is possible to put it by a window that receives sunlight all day indoors, but remember that in these cases the substrate dries faster, so it needs to be watered more often. You should pay attention so that the leaves are not burned with the sun.
7. Old age
If you've had your plant for a while and it's okay with watering and light, then it might be yellow because it's getting old. “The leaves of St. George’s sword turn yellow when they reach adulthood,” says Hancock. “Each leaf has its own life span and, although the individual leaves are long, they will all end up dying.”.
8. Pests
Yellow leaves may also be caused by domestic pests. If you notice any signs, then apply your own insecticide.
9. Nutrient deficiency
Lack of nutrients can also leave the leaves yellow. Change the land and fertilize the plant with some fertilizer for plants. This should be done in spring and summer.