Forcing bulbs is a way to ring in an early spring or make the holidays festive. Adding grass seed to the pots has been my way to dress up the display during bloom. Timing is easy for Paperwhite Narcissus for Thanksgiving and Christmas. They shoot up quickly, even in cool weather. But spring bulbs take a lot longer and sometimes the grass got too tall, especially in warmer weather.
This spring I used two types of sedum cuttings in addition to grass seed. The grass pots needed more water, and the roots competed with the bulbs.The succulents are drought tolerant and they will be something that you want to live on, like the bulbs, when planted outside.

More about forcing bulbs