You asked for it, we've created it! 
We have had so many requests for a horizontal planter, we just went ahead and designed one. You can pre-order it now, and it will be sent when it's in stock. (around the end of August).

Horizontal design fits perfectly under your window or stacked to create a living green wall.
Designed specifically for indoors! WATERPROOF Lined with thick plastic on the back and bottom to prevent leakage but can be used outdoor too.
To hang, just drill or nail through grommet holes and plastic. Holes are evenly spaced across the top so no sagging.
Made from 100% Recycled PET plastic bottles.
39 3/4" X 7 1/2"  Each pocket measures L6" X W7"