Picture posting is enabled for all :)
I developed a rather back breaking technique this year. Soil is well manured and crumbly - I stick in the spade as far as I can, wiggle it well about, (that is starting to sound dirty in fact!!!) and then I push the spade forwards, drop the spud behind it and then pull the spade up a bit so the spud falls down under it. I am guessing that this put them at least 20cm down? Of course I then earth up once they are through and heavy mulch.
Welcome to A4A Nolandyet..We use a trenching spade but never measure the depth accurately...
Don't know how many inches but I always put mine in at a spades depth.Rich...
we give the bulb planter a good shove and plant into the hole, no idea how deep ;D
Tried the bulb planter method a couple of times but couldn't get the dirt out of the planter.