Window Flower Boxes

The perfect plants for your window flower boxes that will last Spring, Summer and Fall. 

It has taken me a few years to perfect but I want to share with you how I plant my flower boxes to look full from Spring all the way to Fall. Curb appeal is important and window planter boxes are an easy way to add some visual interest to the front of your house. 

My flower boxes are a combination of vines and full flowers that drape over the sides of the boxes. It took me a few years to find the best combination of flowers so I thought I would share. Now the front of my house gets about 5-6 hours of direct morning sun. 

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Soil

It’s best to use potting soil. It allows for the roots to grow freely and has fertilizer in the soil. I tend to use this soil. Do I do new soil every year? I get rid of most of the root balls and add about 1/3-1/2 new potting soil every Spring. This helps bring new life to the soil. You don’t want to use top soil. 

Best flowers for window boxes

When planting a container garden I learned the best way is the thrill, the fill and the spill. The thrill is your height and your main focal point this is usually flowers. The fill which fills in the container but doesn’t really add height. The spill is plants that spill over the edges (often vines). We are going to use the same formula to create a beautiful combination of cascading flowers for window boxes.

Flowers (Thrill)

• Supertunias (Proven Winners)
• Petunias
• Geraniums 

Fillers (Fill)

• Marigolds
• Ageratum
• Pansies 
• Impatiens

Vines (Spill)

• Creeping Jenny
• Vinca Vines
• Sweet Potato Vines
• Trailing Verbena

When to plant window boxes?

Here in New England the perfect time to start planting all your annual flowers is mid to end of May. It’s just warm enough miss the last frost. I always plant my window flower boxes and planters the weekend before memorial day or memorial day weekend. 

Plant Food

To get my plants to fill in and grow to their true potential I feed them every 7-10 days. I use a watering can and add plant food. My favorite plant food is Jack’s Classic plant food or Miracle Grow plant food. This is key if if you don’t remember every week and remember to use it once a month. It will help your plants flourish. 

DIY Window Flower Boxes

I get asked all the time where I got my window boxes. Well I actually made them and didn’t blog about them! Can you believe that. Next question is always how to build a window box and how do you hang them? I used cedar for 3 sides of the box with a base of pressure treated wood. I built a box with outdoor screws and added drainage holes to the pressure treated wood. I finished the boxes off with a marine spar varnish. 

I wanted the boxes to look like they were floating and not have visible brackets or corbels so I used metal L brackets that would support their weight. 

Beautiful window Flower boxes to purchase

Now I realize not everyone wants to make their own window boxes so here are some great ones you can buy online. 

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