Honestly, yes—and I’d encourage it, as long as you have a clear thread tying the pieces together. Mixing collections is one of the easiest ways to make an urban outdoor space feel personal instead of showroom-perfect. The trick is to avoid matching everything and instead repeat a few details so the look still feels intentional.
Start with a neutral base, like a simple sofa or dining set in black, charcoal, warm gray, or natural teak. Then bring in one or two pieces from another collection—a sculptural chair, a slim side table, or a different planter—to add character. Keep the scale and proportions consistent, especially on a small balcony or rooftop. A tiny bistro chair can look lost next to an oversized lounge sofa, so measure your space and think about how the pieces will sit together.
I also recommend choosing a common denominator: a shared metal finish, a similar wood tone, repeating curved lines, or a tight color palette. If one collection is very angular and another is very soft, bridge them with cushions, rugs, or accessories. Weather-resistant materials matter too, since urban outdoor furniture often faces sun, rain, and limited storage. Finally, lay out the pieces before you commit. Mixing collections works best when it looks collected over time—not chaotic. Trust your eye, keep one or two strong anchors, and let the smaller pieces do the talking.