plant
植 centers on putting a plant into the ground so it can grow: planting, setting a seedling, or establishing vegetation.
植 combines 木 (tree/wood) with 直, which likely contributes the sound and may suggest setting something upright, as in planting a tree.
A tree 木 stands straight 直 in the ground: 植 is the act of planting a tree or any plant.
For ショク, imagine planting a tree and giving it a shock of water to help it settle: shock -> ショク, and the tree is planted.
plant; vegetation
transplanting (a plant); transplant; grafting
to plant; to grow
to plant; to grow; to raise
colonization; colonisation
planting; planting out; transplanting
garden plant; garden tree
plants and animals; flora and fauna
settlement; immigration
misprint; typographical error; typo
afforestation
tree-planting
rice planting
potted plant
flowerpot; plant pot
Japanese box tree (Buxus microphylla var. japonica); Japanese boxwood
vegetation
to plant; to transplant
hair transplantation
succulent plant