Minecraft wiki entry for Shelters, associated text: You can have a fully-automatic flower and seed farm with just a bit of Redstone and tons of bone meal! Have an 8×8 area of grass with some hoppers at the end. Then, place a row dispensers at the back, facing the grass, and put buckets of water in them. Hook up some Redstone from a BUD switch at the end and delay with Repeaters. Attach another line of Redstone and hook it up to Dispensers, under the Grass and filled with bone meal while facing the Grass on top. If you do it right, automatic block updates should cause grass and flowers to grow and immediately be destroyed by the water flow and be carried along the stream and have the water automatically get sucked in. XisumaVoid made a good tutorial.