heel
v.— «Once you have selected your tree, take it home and store or “heel” it, as they say in the trade, in the coldest, darkest place you have, such as on the north side of your house or in a cellar. Keep it there until just before it starts to bud out.» —“Know your roots” by Meg Mcconahey Santa Rosa Press Democrat (California) Jan. 26, 2008. (source: Double-Tongued Dictionary)