What to Do When Asparagus Fern Leaves Turn Yellow? Teach You the Correct Way to Handle It

Some readers have asked what to do when asparagus fern leaves turn yellow and how to deal with yellowing asparagus fern leaves. First, you need to find out the cause of the yellowing, then treat it accordingly: when asparagus fern leaves turn yellow, or even dry up and drop off, the main causes are:

① Too much light. Asparagus fern likes semi-shade and dislikes strong light, especially in summer it must be kept away from direct sunlight, otherwise the branches and leaves will wither and turn yellow. The pot should be moved to a shady spot, and the foliage should be misted frequently to increase air humidity.

② Improper watering. Asparagus fern likes moisture but fears waterlogging, so the potting soil should be kept alternately dry and moist. Too much water easily causes root rot, while too little water easily causes dry leaf tips, so in dry seasons spray the leaves with clean water frequently.

③ Improper fertilizing. If the top dressing is too concentrated or unrotted fertilizer is applied, it easily causes “root burn”, leading to dry, dropping leaves. Conversely, if the potting soil is poor, the leaves will also turn yellow from lack of nutrients.

④ Poor winter care. Asparagus fern likes warmth and should be kept in a sunny spot in winter. If it is kept for a long time in a place with no light in winter, with poor ventilation or cold, the leaves easily wither and turn yellow. Generally, the room temperature should not be lower than 12°C, and it should be placed near a south-facing window with watering properly controlled.

⑤ Dust and other pollution. Asparagus fern fears smoke and dust; if it encounters toxic gases, the branches and leaves easily turn yellow. In addition, if the plant is too large, the pot too small, or it is harmed by pests such as scale insects, the branches and leaves will also turn yellow, so it should be repotted and treated promptly.

1. Wrong placement

When growing asparagus fern at home, placement is also very important. If it is placed near a radiator or air conditioner, it will quickly turn yellow, and the stems will also show symptoms of drying up. At this time it should be moved away promptly, keeping it away from the air conditioner or radiator.

2. Improper watering

When growing asparagus fern, watering is also very important. You cannot overwater, but when watering you must water thoroughly. If you usually only water the surface of the potting soil, the roots cannot absorb enough water, which will make the leaves turn yellow. At this time you can loosen the soil promptly and water thoroughly, which will reduce the symptoms of yellowing leaves.

3. Temperature adjustment

The asparagus fern also has certain requirements for the temperature of its surroundings. It usually likes to grow in a warm, shady environment, but after winter arrives it should be kept warm promptly, otherwise its leaves will turn yellow. In particular, once the room temperature drops below 5°C, its leaves will turn yellow very quickly, and in severe cases it may even die. The best way to handle this is to cover it with a plastic cover to protect it from the cold, so the leaves can be prevented from turning yellow due to excessively low temperatures.

What to Do When Asparagus Fern Leaves Turn Yellow, How to Handle Yellowing Asparagus Fern Leaves

The asparagus fern has a graceful form, with well-arranged, slender and upright stems. It can purify the air and cultivate character, benefiting both health and feng shui, and many flower lovers grow it at home. But the asparagus fern at home turns yellow as soon as winter comes. What exactly should be done?

Analysis of Yellowing Asparagus Fern Leaves

1. Sunlight

The asparagus fern is a semi-shade plant. Many flower lovers think the asparagus fern is not suitable for sunlight, so they keep it in a backlit place for a long time. This is actually a big mistake!

What the asparagus fern fears is strong sunlight. In summer it needs proper shading, but winter sunlight is not strong to begin with, and keeping the asparagus fern out of sunlight for a long time will make the plant weak and gradually turn yellow.

Therefore, in winter it is best to place the asparagus fern on a sunny windowsill and let it bathe in the warm sunlight.

2. Watering

The asparagus fern likes moisture but fears waterlogging. Before watering, knock on the pot of the asparagus fern. If the sound is crisp and the surface soil you touch feels dry, only then does it need watering. If the sound is dull and the soil you touch is moist, do not water it.

If the surrounding air is too dry, the leaf tips of the asparagus fern will also dry up and turn yellow, so it should be kept away from air conditioners and radiators, and water should be sprinkled on the leaves and around the pot every day to maintain air humidity.

3. Fertilizing

The roots of the asparagus fern are fragile. Applying unrotted fertilizer or overly concentrated fertilizer easily causes “root burn”, resulting in dry, yellow, dropping leaves.

If no fertilizer is applied for a long time and the soil is poor, the asparagus fern leaves will also turn yellow. Therefore, the asparagus fern should be given light, frequent fertilizing, using rotted organic liquid fertilizer diluted at a ratio of 2:1000.

4. Radiation

Not only people need to stay away from radiation; the growth of the asparagus fern also needs to stay away from radiation. Placing the asparagus fern beside a TV or computer will make its leaves and stems dry up and turn yellow.

Generally speaking, keeping the asparagus fern more than 5 m away from the radiation source will greatly reduce the effect.

5. Temperature

The asparagus fern grows best at a room temperature above 10°C. If the temperature is below 5°C, the leaves will dry up and drop.

Flower lovers can check the temperature at home. If it is below 5°C, cover the plant with a bag promptly to keep it warm.

If the temperature is between 5°C and 10°C, the asparagus fern basically stops growing at this time, so reduce watering, do not fertilize, and ensure sufficient sunlight. If the temperature is above 10°C, normal care can be given.

6. Pests and diseases

When the asparagus fern is infected by pests such as scale insects, the branches and leaves easily wither and turn yellow. Flower lovers should check whether the asparagus fern at home has pests. If it does, dilute Jiebijiezhi at a ratio of 1:2000 and spray it on the branches and leaves of the asparagus fern.

Solutions for Yellowing Asparagus Fern Leaves

Besides watering frequently and misting frequently in normal times to keep up the water supply, the asparagus fern also requires attention to several other key points so that its leaves will not turn yellow for 10 years.

1. It must not be exposed to direct sunlight. The asparagus fern by nature likes shady places, but it cannot be too dark either, so it should be placed in a bright, well-ventilated room with north-south exposure, and remember to keep it some distance from the window.

2. Do not smoke at home, or place the asparagus fern in a place with heavy cooking fumes. Over time, this will cause smoke poisoning in the asparagus fern, leading to yellow leaves.

3. Generally, the asparagus fern does not need fertilizing. If it is one that has been grown for many years, a little homemade organic fertilizer may be applied appropriately. Note that it must be a small amount, and it must not be sprinkled on the leaves or roots of the asparagus fern.

4. Asparagus fern leaves that have already turned yellow cannot turn back, so as long as a leaf has turned yellow, cut it off. If half the leaves have turned yellow, then cut off half. Do not be soft-hearted.

5. The biggest cause of yellowing asparagus fern leaves is lack of water, so after cutting off the yellow leaves, replenish water for the asparagus fern promptly. Flower lovers with radiators or underfloor heating at home whose temperature can reach above 20°C can water a bit more. Once there is enough water, the asparagus fern naturally will not have yellow leaves, but be careful not to let water accumulate!

6. Rescue care after yellowing. Generally speaking, once asparagus fern leaves turn yellow, it is very hard for them to turn green again. The weak, diseased branches and leaves will consume the nutrients of the whole plant. In this case, you should sacrifice the pawn to save the rook, cutting off the yellowed branches and leaves to ensure that the new branches and leaves can grow healthily.