To provide visual interest to a container garden, follow the concept of planting flower pots
Dammann's Garden Company – Thrillers, Fillers & Spillers: How to Design a Stunning Spring Planter
Plants for a Wow-Worthy Container - FineGardening
Planting in containers? You'll need thrillers, fillers and spillers
Gardening By The Moon: Container Plantings Ideas — Harvest
Best Thriller Plants for Containers
Favorite Plant Combinations For Container Gardens - House of Hawthornes
Why the thrillers, spillers, and fillers idea works for winter containers
How to Arrange Pots According to Thriller Spiller Filler Technique, Container Gardening Ideas
Favorite Container Combos - Minnesota State Horticultural Society
Get creative with a colorful container garden
Low-Maintenance Fall Porch Pots – Roger's Gardens
Isabelle Palmer's Best Container Plants For Year-Round Colour
Thrillers, Fillers, Spillers, and Chillers: How to Fill Your Container Garden - Royal City Nursery - Blog