De or het paardenzuring?

The correct Dutch article is:

de paardenzuring

Rule Words ending in -ing: almost always de. See the rule
Meaning (Dutch) (bloemplanten) bepaald soort vaste plant, Rumex aquaticus uit de duizendknoopfamilie Polygonaceae

How to use paardenzuring

the paardenzuringde paardenzuring
this paardenzuringdeze paardenzuring
that paardenzuringdie paardenzuring
our paardenzuringonze paardenzuring
your paardenzuringjouw paardenzuring
every paardenzuringelke paardenzuring
which paardenzuring?welke paardenzuring?
a big paardenzuring / the big paardenzuringeen grote paardenzuring, de grote paardenzuring

Meaning, plural, diminutive, pronunciation and translations: WikiWoordenboek (Dutch Wiktionary) (CC BY-SA 4.0). Example sentences: Tatoeba (CC BY 2.0 FR).