Question
How do I care for a noah's ark houseplant?

Answer
dayetta

One of the problems ID-ing plants without seeing them or a picture of them is that you can not be sure what they really are with just a common name...Common names differ from area to area...So it does help if I know where you are located (state, country, etc.)...

The Latin binomial name of the plant you are looking for is Tradescantia spathacea or common name Moses in the Cradle...Typing either of these names into your search engine will give you many sites explaining them and "How to take care of them"..."Guide to Houseplants" is a site I would recommend...

They are not hard to maintain...

This is a good way to water most potted plants...Water your plant based on how much it weighs when thoroughly watered VS when it is ready to be watered again. Plants die from too frequent waterings, not from how much water you give them at one time. Pick up or lean the pot and feel how heavy it is after watering it thoroughly. Don't water it again until it feels considerably lighter and the top of the soil is light in color. Depending on plant types, sunlight exposure and pot size plants will need water at many different rates from once a day to once a month or more...

Examine the sites I recommended above to get any other info (Fertilizer, sun requirements, etc.)you may need...
Good luck...

Hope this helps.
Rick in southern NJ...