The bulbs should hang below the leaves to let the heat rise into the tree.

VOA: special.2010.01.12

You can also wrap a tree in palm tree frond leaves, cornstalks or fiberglass.

VOA: special.2010.01.12

Small pieces of tree bark or cut up leaves can be used.

VOA: special.2009.06.30

The leaves grow on tree trunks.

VOA: special.2010.04.06