It's generally not recommended to keep a Dieffenbachia plant in your bedroom. 

Here's why:

  • Toxicity: All parts of the Dieffenbachia plant contain calcium oxalate crystals, which are toxic if ingested. This can be a concern if you have small children or pets who might chew on the leaves. Symptoms of ingestion can include mouth irritation, swelling, and difficulty swallowing.

  • Light Requirements: Dieffenbachia prefers bright, indirect sunlight. While bedrooms may have some natural light, it's often not enough for optimal growth. This can lead to the plant becoming leggy and unhealthy.

Here's a breakdown of the pros and cons to help you decide:

Pros:

  • Air purification: Dieffenbachia can help remove some common toxins from indoor air.

Cons:

  • Toxicity: Can be harmful if ingested
  • Light requirements: May not thrive in low bedroom light
  • Humidity: May prefer higher humidity levels than most bedrooms

Safer Bedroom Plant Alternatives:

If you're looking for a bedroom plant with air-purifying properties and lower toxicity, here are some great alternatives:

  • Snake Plant (Sansevieria trifasciata): Low light tolerant, air-purifying, and non-toxic to pets and humans.
  • Spider Plant (Chlorophytum comosum): Easy to care for, air-purifying, and non-toxic to pets and humans.
  • ZZ Plant (Zamioculcas zamiifolia): Low light tolerant, drought-tolerant, and air-purifying. Generally considered non-toxic but some sources recommend caution for pets.
  • Lavender (Lavandula angustifolia): Promotes relaxation and may help improve sleep quality. Note that lavender can be mildly toxic to pets if ingested in large quantities.
     

Ultimately, the decision of whether or not to keep a Dieffenbachia in your bedroom is up to you. If you have young children or pets, or if your bedroom doesn't receive much natural light, it's best to choose a safer and more suitable alternative.