Cardi, with Kulture in tow, surveyed Offset's handiwork Friday ... their living room filled with beautiful floral arrangements. Cardi and Kulture were gleeful as they checked out a bed filled with rose petals in the shape of a heart, along with "Love" balloons.

It really looked like a professional decorator designed the surprise, and that's why Cardi questioned Offset to see if he did it. He said he did, but we're not sure if he's saying he arranged the flowers himself or if he hired someone to do it. Either way, it's awesome.

The room is really beautiful ... it's a nice peak in.