De or het plantdiepte?

The correct Dutch article is:

de plantdiepte

Rule Words ending in -te: usually de. See the rule

How to use plantdiepte

the plantdieptede plantdiepte
this plantdieptedeze plantdiepte
that plantdieptedie plantdiepte
our plantdiepteonze plantdiepte
your plantdieptejouw plantdiepte
every plantdiepteelke plantdiepte
which plantdiepte?welke plantdiepte?
a big plantdiepte / the big plantdiepteeen grote plantdiepte, de grote plantdiepte