stalls at about 60kts with flaps down, and I doubt it would be possible to keep its wings level if the forward speed dropped much below that.
It is possible in most aircraft (Piper Cub difficult) to have a controlled descent at a lesser power faster than stall speed, but the rate of descent is so great that even with application of power there is not enough reserve to arrest the rate of descent, and a hard landing results. This may be accompanied by a stall warning at the "Oh sh*t!" moment as the pilot pulls to arrest the descent, and the plane keeps going down. The forward speed can be very slow. After that, it's simply a matter of how strong the landing gear is.
Aircraft modified with STOL kits are particularly susceptible to this.