Ready to go fern farm with great efficiency, you should ready your emerald upgrades (or even void) for your drawer. all you have to do is setting the filter to your liking connecting power and lighting the soul fires, and soon you'll be drowned in ender dust, bonemeal and gunpowder.

-add power from where the dirt is or change from any other place, everything is connected so one input is enough.
-adding vacuumulator in front of the stoves will help you collect the drops.
-you should put filters to outputs of the tunnel so it will work without a problem.( if you dont cut ferns get mixed and it sometimes causes problems,)
-feed flint and stick to mechanical arm to make flint knife so you can cut fern infinitely.
-its quite big so make some room for it ( it should be something like 11x4x6)