Sep 18, 2023 · Use ornamental grasses to add height and texture to any container for gardening. Here, purple fountaingrass adds extra color, too. This planting grows best in partial shade. A. Purple fountaingrass ( Pennisetum setaceum 'Rubrum') — 2. B. Coleus ( Solenostemon 'Sun Velvet Red') — 3. C. Plectranthus 'Variegatus' — 2.