Verb
(intransitive) To plant too many plants (of any particular crop).
With choice hybrid seeds being so expensive, it pays not to overplant if you can help it; pick your seed plates carefully.
(transitive) To plant too many of (some kind of plant), whether by sowing or by transplanting.
Hyponym: oversow
Growers in the region had overplanted their wheat in a desperate attempt to mitigate slim margins by "making it up on volume".
He overplanted tobacco in his eagerness for a cash crop with higher margins.
(transitive) To plant (a place) with too many plants.
The entire breadbasket region was overplanted with cultivars that were more disease-prone but had the dubious advantage of lower seed cost.