I'm looking for a unique idea for a large Flower box

There are are a lot of great upcycled DIY planter ideas on Pinterest. 😊

What about a stock tank

www.hometalk.com/categories/gardening-landscaping/container-gardening/flower

That's an idea, thank you.

couldn't see it, but thank you.

How about a hard plastic puppy pool.

Here's a video I made making mine. its almost 5x4 and made completely from reclaimed wood that was going to be tossed. hope it helps :) happy gardening!

here's the link

Ok, how about an old bicycle pulling an old wagon or cart? I have seen bicycles painted in all one color including the tires, spokes, the whole bike (usually a beige color). A basket in front of the bike can hold soil and plants or potted plants. The Seat can accommodate a pot. The bicycle tires can act as trellises for edible or floral vines.

Attaching a cart or wagon, maybe painted the same way, the same colors, opens up new ways to display and grow veggies or flowers. Around the ground you can use alyssum, vinca, any ground cover, or spreading pumpkin or zucchini vines. The bike handles can support a small wind chime. You can include a birdhouse or feeder, a bird bath, whatever. You can put up a post in your garden and have signs for destinations pointing in different directions or destinations: "swimming hole," " bait," whatever words you want or say, "Paris," "Lisbon," etc. Or maybe an old rowboat and nautical décor like oars, buoys, etc.