You choose whether it is a houseplant or a plant found outside.
Take the time to really see the plant. See its overall shape. See the values that join together to make a whole composition. And, don’t be afraid to make that shadow the darkest part of your drawing. Lights need the darks to pop. If you are looking at your sketch and thinking that it seems a bit dull, try pushing those darks a bit.
It’s OK to make a mistake or overwork a piece. That’s how you learn, right?