Thanks for the answer. It was a Mother's Day Gift for my mom and she had to know what it was so she can read on how to take care of it properly. Thanks again!

The flowers could be pink, yellow, red, orange... If the stems need to be staked/tied to stay upright, it could use more light. As long as the foliage looks good, the roots are healthy. The rate of growth would determine how quickly it outgrows its' pot. There's not enough info here to predict that, IMO. However, after a year+, concern about the condition of the soil should arise. When it's determined that repotting is necessary, often plants fit back in the same pot after changing the soil. Photo, I think they're great plants, very enjoyable!

If the leaves really are spear shaped it doesn’t sound like Amaranth. It has to be a monocot, something like a bulb or a grass. Yoyobon, can you describe these leaves in more detail? And so far you haven’t given us any idea of where this is growing in the world or what sort of habitat it’s in. Garden? Wild? Forest? Meadow? Bog? Could it even be a Typha?

Hi, Randy Man. Are you aware that there is a forum just for plant ID here on Houzz and Gardenweb called Name that Plant? Typically folks start a new post for each new plant they want IDed because a new post gets more eyeballs than if you add to a post that has appeared before. Here are the direct links for GardenWeb and Houzz. You will see the same posts in both. https://www.gardenweb.com/discussions/namegal https://www.houzz.com/discussions/name-that-plant