Cuttings need constant heat and humidity to produce roots. Planting them outside now won't work.

You could try rooting them inside but they'll require a warm spot and may take 8 weeks or more to root. An easy way to try a few is to take a 6" nursery pot filled with a mixture of equal parts sand and soiless mix. Pre-moisten the mix before filling the pot then tamp down lightly. Make holes with a pencil in the soil. Dip the cut end of the cuttings in rooting hormone (#2 would be best, I think) and gently put them in the holes, then firm them in. Place the whole pot inside a clear large plastic bag, mist lightly and tie up the bag. Put them in a bright, warm spot - somewhere that stays equally as warm at night as during the day. Open the bag and mist the stems occasionally. The goal is high humidity without having them get all moldy, but you want to see condensation inside the bag.

Good luck!