You may want to use plastic one-piece molded lattice for this project.
Many colors are available, and no painting is required.
Lattice typically comes in 4' by 8' sheets. As an alternative, use H-molding to seam pieces of lattice together. If you use H-molding, you'll need to install a stake at the bottom to hold the lattice in place. Figure A Figure B Figure C Attach a grommet to the screw to prevent it from going in too far. If you'd like to use the space underneath your deck for storage but don't want the area to look cluttered and unattractive, install lattice walls.