How to Grow Vegetables in Window Boxes


If you are looking for space for a vegetable garden consider installing window boxes on the south- or east-facing side of your home. Many vegetables thrive in window boxes, including salad greens or dwarf vegetable varieties. Vining plants like beans can be planted in boxes so they trail over the edge, requiring no support. Growing in a window box is similar to other container gardening methods. Choose boxes that are at least 8-inches deep so your vegetables have room for a healthy root system.

Step 1

Fill the mounted window box with a quality potting mix. Use soil-less mix if available as it offers superior drainage and it is lighter than soil mixes.

Step 2

Plant the vegetables in in a single row in the box. Plant each transplant to the same depth in the window box that it was at in its nursery pot. Space plants 6 to 10 inches apart in the box, following the recommended spacing on the plant label.

Step 3

Water the soil thoroughly after planting so any air pockets around the roots collapse. Provide water until the excess drains from the bottom of the box.

Step 4

Fertilize window boxes every two weeks with a balanced, soluble fertilizer. Follow application directions and amounts specified by the fertilizer manufacturer for the type of vegetables you are growing.

Step 5

Check the soil moisture in the window box at least once a day and water if it begins to feel dry. Window boxes dry out more quickly than other containers due to the light reflection off windows and siding causing quicker evaporation.

Step 6

Harvest the vegetables as soon as they ripen. Frequent harvesting prevents the box from becoming too heavy while also encouraging further vegetable production on the plant.

Tips and Warnings

  • Ensure the box is well anchored before filling it with soil and plants, otherwise it may fall off or cause damage to your window sills.

Things You'll Need

  • Potting mix
  • Vegetable seedlings
  • Fertilizer


  • University of Maryland Extension: Container Vegetable Gardening
Keywords: window box vegetable garden, container garden, planting vegetables

About this Author

Jenny Harrington has been a freelance writer since 2006. Her published articles have appeared in various print and online publications, including the "Dollar Stretcher." Previously, she owned her own business, selling handmade items online, wholesale and at crafts fairs. Harrington's specialties include small business information, crafting, decorating and gardening.