Different renewability of firefly bush

Currently when the firefly bush is bone-mealed, it drops another firefly bush. This is typical of ground covering and tall flowers in Minecraft. Since the firefly bush is well, a bush. I believe the renewability of it should be different. So when bone-mealed the resulting action should be changed to two alternatives, the first is that the firefly bush should grow to a two high bush, or the second is that the firefly bush drops a seed, which then can be planted of course. 

Naturally these ideas can be altered, for example when you break a firefly bush, you get two seeds or the bush has to harvested with shears.

In conclusion the renewability of firefly bush should either be changed to a two high variant or a farmable crop. Both ideas would add more variety to the firefly bush and potential uses in building as well as making it more interesting and is what I believe to be more fitting in the game.