Bonsai:  Can cause allergic reactions and skin rashes upon contact.

English Ivy:  May trigger allergic skin reactions and is toxic if ingested by pets.

Ficus Tree:  Its leaves collect dust and require frequent cleaning.

Oleander:  Highly toxic and can be fatal if ingested by humans or pets.

Areca Palms:  Known to attract spider mites, which are difficult to eliminate.

Euphorbia Trigona:  Its sap can cause severe skin irritation and possibly blindness.

Lilies:  Some species are highly toxic, especially to cats.

Amaranthus:  A top pollen producer, can exacerbate allergies.

Ricinus Communis: Extremely toxic to animals and humans.

Philodendrons:  Can be poisonous if ingested and cause skin irritation.