The weights are only attached to identify the plants as a bunch. The suppliers put them on as they cut and pack the bunches for stores. It is true that they will weight the plant, but they will also restrict growth. I suggest removing the weight and cutting the plant (if it is a bunch plant) where the weight was covering. Separate the bunch into groups of 2-3 stems and plant at least a thumbs-width apart to ensure light is not blocked.