level 14 Question is incomprehensible

[Sanusihassan]

The question says

Use grid-column and grid-row at the same time to set position in both dimensions.

There is no any hint of where to position the grid cell.

I tried to fill the entire grid area with the grid using:
grid-column: 1 / -1;
grid-row: 1 / -1

but it wasn't the correct answer.

[thomaspark]

Hey @Sanusihassan, this is what the garden should look like on level 14. You should fill the cell with the weed: