this shall be a very simple, relatively small design...
with very complex redstone circuitry
haah circuits prob take more space then the actual farm....
essentially a small grass area flushable by 1-2 pistons, a switch that activates the pistons on and off repeatedly till you turn it off.
throw the switch, watch as water flushes out for just a little bit... then goes away, plant bone meal, water flushes, goes away, plant bonemeal, repeat till you have enough of what you want
. The grass area will be no bigger than bone meal can produce grass/flowers, and some way to allow you to 'target' onto the middle square when bonemealing
me and leet did this as a team, manually and it works great... having a machine to do it with one person would be nice
I like alot of red wool!