Upon closer inspection, you can maybe see that I combined a few techniques for this unique look. Not only did I stamp, I also used a water brush for a slightly watercolor-ish look, then used Copic markers to add some shading, and finally a fine point copic pen for outlining by hand.
My Favorite Things, Poppies stamps (retired)
My Favorite Things, Smooth White cardstock
Avery Elle, Loads of Wishes (sentiment)
My Mind's Eye, Meadowlark 6x6 paper pad (black dot pattern paper)
Distress Inks, Ripe Persimmon, Forest Moss, Gathered Twigs
Water brush, copic multi-liner, copic markers R5 and R8