Marvelous!
I'm a sister cardboard enthusiast!
Once I did it the first time, I was hooked.
I don't pre-wet my cardboard though.
Usually I put it down, weigh it down, and leave it for the rain to wet.
Mainly, I guess, because my desire to smother the grass/weeds is always ahead of my ability to acquire topsoil....
After a fairly thin layer of new topsoil, I have the good fortune to have bunny poo to scatter as the very top layer.
Toss in some worms gathered through the summer as I work in established beds, then relocated in fall, and we're off to the races!
I have never tried to do it quickly.
I lay the cardboard whenever, then top it in time to let the rain, snow, and worms do the work.
I'm almost finished doing my whole property from lawn to a perennial and food garden.
