De or het ladderboom?

The correct Dutch article is:

de ladderboom

How to use ladderboom

the ladderboomde ladderboom
this ladderboomdeze ladderboom
that ladderboomdie ladderboom
our ladderboomonze ladderboom
your ladderboomjouw ladderboom
every ladderboomelke ladderboom
which ladderboom?welke ladderboom?
a big ladderboom / the big ladderboomeen grote ladderboom, de grote ladderboom