It's common for the leaves of a newly planted plant to look droopy. Keep checking the plant in the morning to see if they look droopy/wilted. Don't go by how the plant looks in the afternoon-you'd look droopy if you were standing all day in the hot sun!
What is your watering schedule?
Check the soil around the base of the plant. If you stick your finger in the soil as far down as you can reach-about three inches-is it wet or dry? If dry you may need to up your schedule-instead of every three or four days try every two or three days for the first few weeks then back off until the rains come.