overseed

o·ver·seed

O5209350 (ō′vər-sēd′)v. o·ver·seed·ed, o·ver·see·ing, o·ver·seeds tr.v. To spread grass seed on (turf or an established lawn) in order to fill in thin or bare spots.intr.v. To spread grass seed on turf or an established lawn.

overseed

(ˌəʊvəˈsiːd) vbto plant too much seed in