Freeze Coming.....Phukkin BBRRRR!

Am DEEP mulching my beloved Jamaican Cherry (Mutingia calabura) I sought for 7 years that THRIVED this year in the evolving south end food forest in a buried 7 gallon Water Wise Container Garden as the few others I knew of in the bay area froze fatally the last 2 winters. It is VERY tropical and VERY difficult to propagate so today I piled about 8 inches of garden soil around the trunk. Tomorrow I will add 2 feet of mulch,  then DEEP water, then before I hit the sack will fill a metal can that Mary Jo dropped off today with charcoal briquettes and light them and set the can beneath the crown.