What does "overplant" mean?

To plant too many plants (of any particular crop).

Overplant

verb

verb ·Rare ·Advanced level

Verb

1
To plant too many plants (of any particular crop). intransitive
"With choice hybrid seeds being so expensive, it pays not to overplant if you can help it; pick your seed plates carefully."
2
To plant too many of (some kind of plant), whether by sowing or by transplanting. transitive
"Growers in the region had overplanted their wheat in a desperate attempt to mitigate slim margins by "making it up on volume"."
3
To plant (a place) with too many plants. transitive
"The entire breadbasket region was overplanted with cultivars that were more disease-prone but had the dubious advantage of lower seed cost."

"With choice hybrid seeds being so expensive, it pays not to overplant if you can help it; pick your seed plates carefully."

From over- + plant.