ZZ plants are popular houseplants known for their glossy leaves and low maintenance needs. Many plant enthusiasts choose them for their hardiness and ability to thrive in low light conditions. However, like any plant, ZZ plants come with certain drawbacks that potential owners should consider before bringing one home.
ZZ plants contain calcium oxalate crystals that make them toxic if consumed by humans or pets. This toxicity is one of several disadvantages that might make some people think twice about adding this plant to their collection. Understanding these drawbacks can help plant owners make informed decisions and take appropriate precautions when caring for ZZ plants.
1. Skin irritation from plant sap
ZZ plants’ sap contains calcium oxalate crystals, which can irritate human skin.
When pruning or handling ZZ plants, the sap may get on your hands. This can lead to symptoms like itching, redness, or a rash in some people.
Sensitivity to ZZ plant sap varies from person to person. Some individuals might experience more intense reactions than others.
The irritation is usually mild and temporary for most people. However, it can be uncomfortable and annoying while it lasts.
Wear gloves when handling ZZ plants to prevent skin irritation. Gloves create a barrier between your skin and the potentially irritating sap.
Washing your hands thoroughly after touching the plant can also help. Use soap and water to remove any remaining sap from your skin.
If you do experience irritation, rinse the affected area with cool water. This can help wash away the irritating compounds and provide some relief.
Applying a mild hydrocortisone cream may help reduce inflammation and itching for more severe reactions. Consult a doctor if symptoms persist or worsen.
Keep ZZ plants away from children and pets who might touch the leaves and then rub their eyes or mouth. The risk of serious harm is low, but prevention is best.
Despite this disadvantage, many plant owners find that proper handling makes ZZ plants safe to keep in their homes. The risk of irritation shouldn’t necessarily discourage ownership.
Check out How to Take Care of a ZZ Plant?
2. Potential vomiting if ingested
ZZ plants contain calcium oxalate crystals in all parts of the plant. These crystals can irritate when ingested by humans or pets.
One of the most common symptoms after ingesting a ZZ plant is vomiting. This happens because the calcium oxalate crystals irritate the digestive tract and trigger the body’s natural defense mechanism.
The sap from ZZ plants is particularly problematic. When someone consumes any part of the plant, the irritating compounds can lead to vomiting that might last for several hours.
Children and pets are at higher risk because they might chew on houseplants out of curiosity. Small amounts can cause mild symptoms, while larger amounts may result in more severe reactions.
Besides vomiting, ingestion of ZZ plant parts can also cause other digestive issues. People might experience stomach aches, nausea, and diarrhea after consuming parts of this plant.
The severity of symptoms depends on how much plant material was eaten. Most cases are mild and resolve on their own within 24 hours.
If someone has ingested a ZZ plant, it’s important to rinse their mouth with water. This helps remove any remaining plant particles and can reduce irritation.
Medical attention should be sought for severe symptoms or if large amounts were consumed. While ZZ plant poisoning is rarely life-threatening, the symptoms can be uncomfortable and distressing.
To prevent accidental ingestion, ZZ plants should be kept out of reach of children and pets. Proper placement on high shelves or in rooms where unsupervised access is limited can help avoid these issues.
When handling ZZ plants, gloves are recommended. This prevents the sap from contacting skin and reduces the risk of accidentally transferring irritants to the mouth or eyes.
Check out Is ZZ Plant Good for Bedroom?
3. Diarrhea risks from accidental consumption
ZZ plants contain calcium oxalate crystals that can cause digestive problems if consumed. However, these crystals are also a defense mechanism used by many houseplants to protect themselves from being eaten in the wild.
If someone accidentally ingests parts of a ZZ plant, they may experience diarrhea as their body tries to expel the irritating substance. This reaction typically occurs within a few hours of consumption.
The severity of diarrhea depends on how much plant material was eaten. Small amounts might cause mild symptoms, while larger quantities could lead to more intense reactions.
Children and pets are at higher risk because they might chew on houseplants out of curiosity. Their smaller bodies also react more strongly to the toxic compounds found in ZZ plants.
Symptoms often include abdominal pain and cramping along with diarrhea. These digestive issues can be uncomfortable but usually resolve within 24-48 hours.
In more serious cases, vomiting may accompany diarrhea as the body works to remove the irritating plant material. Staying hydrated during this time is important to prevent dehydration.
Most ZZ plant ingestion cases don’t require medical treatment. However, seeking medical attention is advisable if symptoms are severe or persist for more than a day.
To prevent accidental consumption, keep ZZ plants out of reach of children and pets. Consider placing them on high shelves or in rooms with limited unsupervised access.
Always wash your hands thoroughly after handling ZZ plants to avoid transferring any sap or plant particles to your mouth. This simple precaution can significantly reduce the risk of accidental ingestion.
4. Swelling of lips and tongue when ingested
ZZ plants contain calcium oxalate crystals that can cause harm when ingested. These crystals act as a defense mechanism for the plant but create immediate problems for humans who eat any part of the plant.
The first symptom is often a burning sensation in the mouth. This burning feeling happens when the sharp crystals come into contact with the sensitive mouth and throat tissues.
Swelling of the lips, tongue, and throat may follow shortly after ingestion. This reaction can make speaking and swallowing difficult and uncomfortable.
Children and pets are at higher risk because they might chew on houseplants out of curiosity. Even a small amount of ZZ plant material can trigger these symptoms in sensitive individuals.
The discomfort typically begins immediately after chewing or swallowing parts of the plant. Pain and irritation can last for several hours as the body reacts to the crystals.
Excessive drooling often accompanies the swelling and burning sensations. This is the body’s natural response to try to flush out the irritating substance.
In more severe cases, the swelling can extend down the throat and cause difficulty breathing. While rare, this represents a more serious medical situation that requires prompt attention.
Most cases of ZZ plant ingestion don’t require emergency care. Drinking milk or eating yogurt may help soothe the irritation by coating the affected areas.
Always wash your hands thoroughly after handling ZZ plants. The sap can transfer from your fingers to your mouth, eyes, or other sensitive areas and cause irritation.
If someone experiences severe swelling or breathing difficulties after ingesting a ZZ plant, seek medical help immediately. These symptoms might indicate a more serious allergic reaction.
5. Difficulty breathing from ingestion
The ZZ plant contains calcium oxalate crystals that can cause serious health problems if ingested. These crystals are found throughout the plant, including the leaves, stems, and roots.
One of the most concerning symptoms of ZZ plant toxicity is difficulty breathing. This occurs when the calcium oxalate crystals irritate the throat and respiratory passages after ingestion.
Swelling of the lips, tongue, and throat may develop soon after consuming parts of the ZZ plant. This swelling can narrow airways and make breathing challenging, especially in severe cases.
Children and pets are particularly vulnerable to these effects due to their smaller size and airways. Even a small amount of plant material can cause significant respiratory distress in these groups.
Symptoms typically begin with oral irritation and excessive drooling. If a significant amount is consumed, these initial signs may progress to difficulty swallowing and then to breathing problems.
If you notice anyone experiencing breathing difficulties after potential ZZ plant ingestion, seek urgent medical attention immediately. Don’t wait for symptoms to worsen as respiratory distress can become serious quickly.
Treatment typically involves managing the symptoms while the body eliminates the toxins. Medical professionals may need to reduce swelling and ensure airways remain open.
To prevent these problems, place ZZ plants out of reach of children and pets. Consider keeping them in rooms that aren’t accessible to curious little ones or animals.
When handling the plant, wear gloves to prevent skin irritation and wash your hands thoroughly afterward. This reduces the risk of accidentally transferring plant sap to your mouth.
If you have household members with asthma or other respiratory conditions, be especially cautious with ZZ plants. These individuals may experience more severe reactions if ingestion occurs.
6. False rumors about extreme toxicity
During the 2010s, rumors circulated that ZZ plants were extremely poisonous. Some people claimed these plants could cause serious illness or even death. These exaggerated claims spread quickly through social media and garden forums.
The truth is that ZZ plants are only mildly toxic. They contain calcium oxalate crystals, which can cause discomfort if ingested. However, they are not deadly or severely dangerous as the rumors suggested.
If someone eats part of a ZZ plant, they might experience irritation in their mouth and throat. The sap can also cause skin irritation in some people. These reactions are typically mild and temporary.
Many houseplants contain similar compounds. The level of toxicity in ZZ plants is comparable to other common houseplants like pothos and philodendrons.
The risk for pets like cats and dogs is similar. Ingestion might cause some discomfort, but it’s rarely life-threatening. Pet owners should still keep ZZ plants out of the reach of curious animals.
False rumors about extreme toxicity have discouraged some people from enjoying this otherwise excellent houseplant. Some have even thrown away perfectly healthy plants after hearing these exaggerated claims.
Wash your hands after handling any houseplant. This simple precaution is usually enough to prevent skin irritation from ZZ plant sap.
Children should be taught not to put plants in their mouths. This applies to all houseplants, not just ZZ plants. Basic supervision and education are more practical than avoiding ZZ plants altogether.
Despite their mild toxicity, ZZ plants remain safe to keep in homes. The benefits of having this air-purifying, low-maintenance plant typically outweigh the minimal risks.
7. Risk of overwatering leading to root rot
ZZ plants face a serious threat from overwatering, which often leads to root rot. This plant has adapted to drought conditions and stores water in its rhizomes and stems, making it particularly sensitive to excess moisture.
Overwatering happens when soil remains wet for too long. This creates an environment where anaerobic fungi and bacteria thrive, causing the roots to rot and die. The rhizomes become saturated and can’t absorb oxygen, nutrients, or ironically, even water.
Signs of root rot include yellowing leaves, black or brown spots on stems, and a soft, mushy feeling at the base of the plant. Once these symptoms appear, the damage may already be significant.
When examining a ZZ plant with suspected root rot, you might notice the roots look brown, black, or mushy instead of firm and white. These damaged roots can no longer support the plant effectively.
The challenge with ZZ plants is that they send mixed signals. Their resilient nature means they don’t show damage immediately, which can lead plant owners to continue harmful watering patterns.
Allow the soil to dry completely between waterings to prevent overwatering. During winter months, ZZ plants need even less water as they enter a period of slower growth.
To reduce the risk of water accumulation, use well-draining soil and pots with drainage holes. A mixture containing perlite or coarse sand helps excess water escape quickly.
Check the moisture level by inserting your finger about two inches into the soil. It might be time to water if it feels dry at that depth. If there’s any moisture, wait longer.
Remember that underwatering is far less harmful to ZZ plants than overwatering. When in doubt, waiting a few more days before watering again is safer.
If root rot has already taken hold, act quickly by removing the plant from its pot and cutting away affected roots. Repot in fresh, dry soil and reduce watering frequency to help the plant recover.
8. Limited lighting tolerance
ZZ plants are often praised for their ability to survive in low light conditions. However, this tolerance has its limits. While ZZ plants can survive in low light, they don’t thrive in these conditions.
In low light, ZZ plants grow much slower than those in brighter spots. You might notice fewer new shoots and leaves when your plant doesn’t get enough light. Growth can become so slow that the plant appears dormant for months.
When kept in dim conditions for too long, ZZ plants may develop leggy stems. The plant stretches toward available light sources, creating an unbalanced appearance. This stretching weakens the plant structure over time.
Extremely low light can also cause leaf yellowing. While ZZ plants are tough, they still need some light for photosynthesis. Without enough light, older leaves may turn yellow and eventually drop off.
On the flip side, ZZ plants don’t do well in direct sunlight either. Too much direct light can scorch their leaves, causing brown spots or crispy edges. Their limited light tolerance means finding that perfect middle ground.
The ideal spot for a ZZ plant offers bright, indirect light. This balanced lighting promotes healthy growth while avoiding the problems of too little or too much light. Finding this balance can be challenging in some homes or offices.
Some ZZ plant owners get frustrated when they don’t produce new growth for long periods. Slow growth in low-light conditions can be disappointing if you’re looking for a more dynamic houseplant.
While ZZ plants can tolerate low light, they won’t show their best features in these conditions. The glossy leaves appear less vibrant and the overall plant looks less lush when light is insufficient.
For optimal health, ZZ plants benefit from occasional rotation. This ensures all sides receive equal light exposure, preventing the plant from leaning too heavily in one direction.
9. Poisonous to pets like cats and dogs
ZZ plants contain insoluble calcium oxalates which are toxic to pets. These compounds can cause irritation and discomfort if your cat or dog chews on or ingests any part of the plant.
The toxic nature of ZZ plants poses a risk for households with curious pets. Dogs and cats often explore their environment with their mouths, making them vulnerable to accidental poisoning from houseplants.
While the toxicity is mild compared to some other houseplants, it shouldn’t be dismissed. If a pet consumes part of a ZZ plant, they might experience irritation of the mouth, tongue, and lips.
Pets may also show symptoms like excessive drooling, vomiting, and difficulty swallowing. These reactions occur because the calcium oxalate crystals physically irritate the tissues they contact.
Most cases of ZZ plant exposure in pets don’t result in severe poisoning. However, any concerning symptoms warrant a call to your veterinarian or pet poison control.
Pet owners should place ZZ plants in locations that pets cannot access. High shelves, hanging planters, or rooms where pets don’t have unsupervised access are good options.
If you notice your pet chewing on a ZZ plant, remove any plant material from their mouth if possible. Then rinse their mouth with water to wash away irritating compounds.
The mild toxicity of ZZ plants makes them less dangerous than some other houseplants. Still, prevention is always better than dealing with a sick pet.
For households with pets that frequently chew on plants, it might be better to choose completely non-toxic alternatives. Many pet-friendly houseplants can provide similar aesthetic benefits without the risks.
Conclusion
ZZ plants have notable downsides that plant owners should consider before bringing one home. Their toxicity to humans and pets remains the most significant concern, as all plant parts contain calcium oxalate crystals that cause irritation if ingested.
While ZZ plants tolerate neglect well, they respond poorly to overwatering, which leads to root rot and yellow leaves. Their slow growth rate means damaged plants take considerable time to recover.
ZZ plants develop leggy growth in low light conditions with smaller leaves, compromising their aesthetic appeal. Despite their hardy nature, they still require some basic care and monitoring to thrive.
Understanding these disadvantages doesn’t mean avoiding ZZ plants altogether. Rather, it helps owners make informed decisions about placement, care routines, and whether these plants fit their household needs.
Many of these disadvantages can be effectively managed with proper precautions—keeping them away from children and pets, maintaining appropriate watering schedules, and providing adequate light.
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