Plant
If you want a tree to grow straight, you have to plant it properly. Everyone knows that poorly planted trees grow all crooked and twisted. That's just how plants work. If your tree's not straight, start over and plant it again.
しょく
う
None
You plant and re-plant your tree over and over, utterly shocked (しょく) at how hard it is to plant it right. You thought planting trees was easy, so this is a real shock to you.