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Internet # 202073368

Model # F3626-B

36 in. Adjustable Flower Box Holder

  • Flower box holder accepts planters up to 36 in. W and 8 in. D
  • Includes adjustable mounting brackets for rails 2 in. to 6 in. W
  • Steel construction and black finish offer durability and beauty
  • View More Details
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Product Details

About This Product

The CobraCo 36 in. Adjustable Flower Box Holder is a fixed-width, steel-framed unit that mounts to a porch, deck, terrace or balcony railing. It’s adjustable by way of the short and long mounting brackets included so it attaches to railings 2 in. to 6 in. wide. Coated with an attractive and protective black finish, the sturdy steel construction is substantial enough to hold a flower box up to 36 in. W and 8 in. D or a combination of planters not exceeding those dimensions. A non-tip bumper at the rear base keeps the unit level so soil and water don’t spill out, giving your plant life proper alignment to thrive. The rust-resistant outdoor decor piece is a quick and affordable way to add brilliant blooms and/or lush greenery to an otherwise drab landscape.


  • Allows you to hang a 36 in. flower box from a porch, deck, terrace or balcony railing
  • Durably constructed with steel and finished in black to complement any existing decor
  • Includes adjustable hanging brackets for mounting to rails 2 in. to 6 in. wide
  • Accommodates one flower box or a combination of planters not exceeding 36 in. x 8 in.
  • Transforms an otherwise ordinary space into a lively, colorful sanctuary
  • Rust-resistant for lasting performance in any climate
  • Allows water to drain, reducing the chance for root rot
  • Plants, soil and flower box sold separately
  • Note: holder does not expand or contract; adjustability relates to extendable brackets that clasp onto railings of different widths
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 202073368

Model # F3626-B

Additional Resources

Shop All CobraCo


Dimensions: H 5 in, W 36 in, D 8 in


Product Depth (in.)

8 in

Product Height (in.)

5 in

Product Width (in.)

36 in


Color Family






Kits & Accessories Type

Hooks & Hangers



Mounting Type


Package Quantity


Pots & Planters Type

Kits & Accessories

Product Type


Product Weight (lb.)

2.45 lb





Weight Capacity (lb.)

25 lb

Questions & Answers

Q:I am looking for a over the railing flower box holder to put an already planted container railing...
by|May 15, 2017
1 Answer
Answer This Question

A:  Yes this one should work. It will fit a railing that is 2"-6" in size. Thank You, Jennifer Customer Care

by|May 5, 2023
    Q:Do you need screws to attach this to the railing or does it just hook over?
    by|Aug 27, 2016
    1 Answer
    Answer This Question

    A:  Screws are provided with the planter. Thank You, Jennifer Customer Care

    by|May 5, 2023
      Q:Product details
      by|Jun 13, 2016
      1 Answer
      Answer This Question

      A:  Hello, Thank you for your inquiry. This is the same planter in all the photos. It just looks different when the pots are in it versus a flower box. Thank You, Jennifer Customer Care

      by|May 5, 2023
        Q:What is the smallest you can adjust it to? Will it adjust down to 24 in.?
        by|Oct 31, 2015
        1 Answer
        Answer This Question

        A:  This model (fixed at 36") isn't adjustable by planter width, but it can be mounted on different size railings. There are also models in smaller sizes and an adjustable holder model that works for 24"-36" planters.

        by|May 3, 2023
          Showing 1-4 of 6

          Customer Reviews

          3.4 out of 5

          • 3.4 out of 6 reviews
          • 80% recommend this product
          Filter by:
          Showing 1-6 of 6 reviews
          Flower Box Holder
          It was difficult to find this type / size box. When attempting to assemble, one of the brackets was completely bent under. Had to use a small sledge hammer to straighten out. Still not completely straight, but works. I'd recommend, but it came from China, so have to expect this type of situation.
          • DIY
          • Verified Purchase
          • Recommended
          Terrible Customer Service
          I bought 9 of these and the screws and caps to hold the box onto the railing are very tiny and I lost a few during installation. I called the company that makes these - CobraCo - and asked to buy some additional screws and caps but they said I would have to buy the screws along with the brackets (which I didn't need). Hardware stores do not carry these screws and caps and CobraCo told me they manufacture the screws and caps themselves but refused to sell me additional screws and caps! I asked to speak to a manager but the "Customer Service" rep would not put me through. She put me on hold and then several minutes later came back and told me again that I'd have to buy the screws and caps along with the brackets. This is terrible Customer Service and therefore I would not buy any products by this manufacturer again!
          Response from THD-CSJul 14, 2015
          Dear Valued Home Depot Customer, "Currently the screws are not offered as a separate part. Thank you for taking the time to share this feedback. We apologize for this experience and have shared this information with the Product Managers. Our Consumer Relations Team can be reached at 1-800-323-5800 with any questions. Sincerely, Kelly Consumer Care Representative Woodstream Corporation CobraCoâ„¢ "
          • DIY
          2 found this review helpful
          Great product. Shipped to me quickly.
          Excellent product. Easy to put together. Shipping fast
          • Verified Purchase
          • Recommended
          Not sturdy enough for full 36" planters
          Maybe if you put one of the smaller planters in this bracket it would work but I bought three of these to go with the three 36" planters I also bought at the same time. Mounted them up and filled my planters but when I went to put the 36" planters in these brackets, the weight of them caused these brackets to bend and buckle. They are pretty much unusable for me right now. I'm guessing that if I used a smaller planter then it wouldn't be too heavy but if it claims to be usable with 36" planters, that should mean it can handle the weight of a 36" planter with soil in it. I guess if it was empty it would work but what's the point in that? Still bummed I lost the receipt because now I'm just gonna go back and build my own shelf or bracket for the planters and I'm out a decent bit of money on these flimsy things.
            7 found this review helpful
            planter works well,and secures easily to deck to provide strength
            • DIY
            • Recommended
            sturdy build
            This holder is very sturdy. I ordered 3 of them for my pennington window boxes (the 30inch), not realizing that they are not expandable and contractable. I didn't realize that only a few of the cobraco holders are expandable/contractable, the others are set at the width listed. Because of this fact, I sent the holders back and instead ordered the cobraco adjustable and expandable holders. When I recieved the new adjustable expandable holders, I instantly regretted sending my first order back. The expandable holders are not as well built at all, and they are not as deep either. My window boxes would not even fit in them. I am going to send them back and reorder these. Even though they are larger than i need, I don't mind having a little extra space on each side. I wish I would have kept them from the beginning!
              • Recommended
              9 found this review helpful
              Showing 1-6 of 6 reviews