Certified GKH Gardening Expert
Generally, once the temperatures remain above freezing, it will be ok to start watering. This article will give you more information on the care of these: https://www.gardeningknowhow.com/ornamental/bulbs/agapanthus/agapanthus-plant-care.htmh
Thanks for your response. The linked page appears to have expired. Is it ok to put and leave out the agapanthus now to start growing again? I have lost evergreen types to leaf rot after they were left out all Winter. I don't want them to get over watered.