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Window Box Planters

Window Box Planters

Enhance your home's curb appeal with our high-quality window box planters, designed to bring vibrant color to any window or railing. Our window boxes, including innovative side-planting options, create lush and full displays that flourish quickly after planting. Constructed from durable heavy-gauge steel bars and coated in protective black plastic, these window planters and flower boxes are built to withstand the elements while providing a beautiful, long-lasting home for your favorite blooms. Ideal for flowers, herbs, and greenery, these versatile planters can also be used as railing planters, offering flexibility for balconies, decks, and more.

Watch Pamela's Video on How to Plant a Window Box

Frequently Asked Questions About Side-Planting Window Box Planters

  • What size window box do I need?

    A window box usually looks best when it matches the width of the window or runs slightly wider. Kinsman window boxes come in three lengths: 24" (8" wide x 8" deep), 30" (8" x 8") and 36" (9" x 9"). For longer windows and railings, Euro Classic Hayracks come in lengths up to 55".

  • How many plants do I need for a window box?

    The 24" box holds seven side plants, seven top edging plants and two centerpiece plants. The 30" holds eight side, eight edging and two centerpiece plants, and the 36" holds nine side, nine edging and three centerpiece plants. All of the plants should come from 3" to 4" pots.

  • What is a side-planting window box?

    A side-planting window box lets you plant through the front and sides as well as the top, so the box is covered in flowers in weeks instead of months. Pamela Crawford's design uses a coco-fiber liner with ready-made holes and slits, so there is no cutting liners or packing loose moss by hand.

  • How do you hang a window box?

    Mounting hardware is sold separately, so you can choose what suits your wall or railing. Kinsman suggests J Hooks or Hayrack Brackets. Plated or masonry lag bolts and washers from a hardware store also work. Mount into solid framing or masonry, since a planted, watered box is heavy and must be secured properly.

  • Can you hang a window box on vinyl siding?

    Kinsman does not recommend it. A planted, watered side-planting window box is too heavy for vinyl siding hooks, and drilling through vinyl siding can tear it. If you want to mount a window box on a wall with vinyl siding, consult your siding installer before making any holes.

  • Can window boxes be used on railings or decks?

    Yes. Kinsman window boxes work under windows, on walls and railings, and they can sit directly on a deck or patio when raised on pot feet. Lifting the box lets it drain freely and keeps the liner off the deck boards.

  • What are Kinsman window boxes made of?

    Kinsman window boxes are made from steel bars coated in black plastic, with a coco-fiber liner attached. The open frame shows off the planting, and the coco-fiber liner allows drainage and airflow around the roots.

  • How often should I replace a window box liner?

    For best results, plan on a fresh side-planting coco liner each year. The planting holes stretch as plants grow, so a used liner will not hold new root balls as well. Replacement liners are sold by size: CLZW24 for the 24" box, CLZW30 for the 30" and CLZW36 for the 36".

  • How do I keep a window box from drying out?

    Coco fiber breathes and drains, so window boxes dry out faster than solid pots, especially in sun and wind. Check the soil daily in summer heat. Rain Gel granules or Rain Mats help the soil hold moisture between waterings.

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