Bring a Touch of the Mediterranean to Your Home or Patio. Our set of 2 Olive Washpot Plants, with the proper care, will produce white flowers in spring and small olives ready for harvest in autumn; the tree may not bear fruit the first year. Keep it in a warm, bright location (indoors or out) to encourage fruiting; protect from extreme cold. Care for your olive trees by watering thoroughly, allowing soil to dry slightly between watering. Keep exposed to bright light, full sun, reflective light. Ideal indoor temperature is 40-80 degrees F.