De or het wierookboom?

The correct Dutch article is:

de wierookboom

How to use wierookboom

the wierookboomde wierookboom
this wierookboomdeze wierookboom
that wierookboomdie wierookboom
our wierookboomonze wierookboom
your wierookboomjouw wierookboom
every wierookboomelke wierookboom
which wierookboom?welke wierookboom?
a big wierookboom / the big wierookboomeen grote wierookboom, de grote wierookboom