Simple Formula for Beautiful Window Boxes and Planters

Container gardening is a fun way to express your style with plants. There is an easy 3-part formula to ensure your window boxes and flower pots look fantastic every time. 

Thrill, fill, and spill is the secret to beautiful flower containers. If you follow those three pieces of advice your planters will never fail. Let cover what each piece to the puzzle means.


Just what it sounds like, the “thrill” is a plant that catches your eye. Think of the “thrill” as your focal point. You should use these plants sparingly to avoid overstimulating the viewer.

Thrilling plants have contrasting color from the other plantings. They grow above the accompanying plants and have a unique texture. Great “thrill” plants include, but are not limited to:


Plant these plants near the center of your planter or, if you are using a long window box, plant 2 or 3 evenly spaced apart.


The “fill” are plants that grow and occupy empty space in the planter. They can be foliage plants or have flowers. However, it is important to make sure that they don’t steal the show from your “thrill.”

There are plenty of options to choose from when you are selecting plants to fill your planters and window boxes. You can use annuals, perennials, or a combination!

Try some of these plants:


The last ingredient for your beautiful flower arrangement is “spill.” Just like the photo above, your planters need something to spill over the sides and down the pot or window box. The “spill” adds the finishing touch and makes your planting appear robust and full.

Try using some of these plants to create your spill:

  • Varieties of ivy
  • Stone sedum
  • Vinca vine
  • Trailing herbs
  • Nasturtiums

Thanks for checking out this DIY project! You can scroll through related articles below. Want beautiful containers and need a hand? Please submit an estimate request below, or view all of our services.

Related Posts

Everything you need to know about crabgrass this summer

Crabgrass Info Crabgrass is a common nuisance in lawns across the country. A lot of homeowners battle this grassy weed each year. Before you take action, you should correctly identify the pest. A lot of our customers think they have crabgrass, but they actually have a...

What does Integrate Pest Management Mean for Green Thumb?

“Integrated pest management” (IPM) is probably a new term for most homeowners. It’s a relatively new term to landscapers and the lawn care industry, too. Heavy research on the topic began around the 1970’s. If you are interested in the history of pest control Penn...

Raising Mowing Heights During Summer

Most people set their lawn mower height after purchasing their lawn mower, then they never touch it again. There's nothing wrong with that. But, since our goal is to educate our customers and provide the highest quality of service, let me show you why "set it and...

Low Maintenance Landscaping: Fine Fescue

For homeowners that maintain their own properties, low maintenance = good! Fine fescue is a terrific turfgrass variety if you are looking for a beautiful lawn for less work. My first experience with fine fescue was in 2015, my first year at the University of Maryland....

Low Maintenance Landscaping: Zoysia

For homeowners that maintain their own properties, low maintenance = good! Zoysia grass is a terrific turfgrass variety if you are looking for a beautiful lawn for less work. Zoysia grass is common in southern regions of the country, but our transition zone can still...