Tradescantia fluminensis is a perennial ground cover that spreads along the ground with soft, hairless stems and leaves. The fleshy stems root at any node that is on the surface. The plant has oval, dark-green leaves with pointed tips that are shiny, smooth and slightly fleshy about 1.25–2.5 inches (32–64 mm) long. The flowers are white with three petals and approx. 0.5–1 inch (13–25 mm) in diameter. They are produced in small clusters in summer and the flowers can make several seeds.
With a watering can, water the entire surface of the soil and let it soak in. after a few seconds, pour in some more to ensure that everything is soaked. repeat this until you see water dripping from the bottom of the pot. if you do not see water, then the soil is not completely soaked.
Get rid of damaged leaves and stems. This is important because damaged leaves and stems can actually be an energy drain on your plant. By removing those dead parts, you're taking some of that work off your plant’s plate and allowing it to divert its energy into healthy leaves and new growth!
Tradescantia Zebrinas prefer average to warm temperatures of 55–80 degrees during the day and above 50 degrees at night. Feed once every month during the spring and summer with a liquid fertilizer for indoor plants.
Here’s a handy guideline: increase pot size by 2.5-5 cm (1 to 2 inches) in diameter for plants that are growing in pots 25.4 cm (10 inches) in diameter or less. For larger plants, those growing in pots greater than 10 inches in diameter, increase the pot size by 5 or 7.62 cm (2 or 3 inches) in diameter.
In short, the answer is a resounding YES. The plant has sap within the stems that will bother your cat's digestive tract. It's important to note that usually there isn't a toxic reaction to consuming the leaves. But there's also no reason to risk it, when part of the plant is definitely toxic.