A plant that grows natively in tropical American climates, philodendron is a popular indoor plant due to its pretty heart-shaped leaves. You can also grow it from seed, or repot it into a container you use inside the house. However, it is mildly toxic to both children and pets.
This indoor/outdoor flowering plant needs at least half a day of direct sunlight in order to bloom, and it doesn’t tolerate the cold very well. Due to those characteristics, some experts recommend bringing the oleander inside, especially during the winter.
This plant is easy to grow indoors, but all parts of it are poisonous. The degree of toxicity is so severe, it has been used in suicides and murders. The plant is beloved due to its distinctive flowers that become up to six inches long. Due to the inherent danger of this plant, though, you may want to keep it out of the house.
Interestingly, this plant has many associations with Jesus Christ, and by its name, you may be led to believe it was used during his crucifixion. However, the Crown of Thorns is native to Madagascar, and wasn’t known in biblical times.