| | Plattdeutscher Name | Deutscher Name | Englischer Name | Botanischer Name | | Kolrose (Goettingen) | Mohn, Klatsch- | Poppy, Field | Papaver rhoeas |
| Koltkutte (Iserlohn/Westfalen) | Pappel, Zitter- | Aspen | Populus tremula |
| Konarifinkensead (Helgoland) | Vogelmiere + Sternmiere, Vogel- | Chickweed, Common | Stellaria media |
| Kooblome (Bremen/Niedersachs.) | Sumpfdotterblume | Marigold, Marsh + Kingcup | Caltha palustris |
| Kook | Rettich, Garten | Radish | Raphanus sativus |
| Koomule | Baerenklau, Wiesen- | Hogweed | Heracleum sphondylium |
| Koomulen (Rotenburg/Wuemme) | Sumpfdotterblume | Marigold, Marsh + Kingcup | Caltha palustris |
| Koppraa (Suedholstein) | Kornrade, Gewoehnliche | Corn Cockle | Agrostemma githago |
| Korkaike (Westfalen) | Eiche, Kork- | Oak, Cork | Quercus suber |
| Korkeckerboom (Norderdithm.) | Eiche, Kork- | Oak, Cork | Quercus suber |
| Korkeek (Mecklenburg) | Eiche, Kork- | Oak, Cork | Quercus suber |
| Korkeekboom (Holstein) | Eiche, Kork- | Oak, Cork | Quercus suber |
| Korkeekenboom (Ostfriesland) | Eiche, Kork- | Oak, Cork | Quercus suber |
| Korkekelboom (Ostfriesland) | Eiche, Kork- | Oak, Cork | Quercus suber |
| Korkeken (Schleswig-Holstein) | Eiche, Kork- | Oak, Cork | Quercus suber |
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