Some plants do need a year or two to get settled into their new spot before they will bloom. I would give it at least another year. Weigela also needs at least 6+ hours of full sun to bloom well and develop the leaf color for which they are famous. If your plant is not receiving 6 continuous hours in the morning before it receives the part sun in the afternoon, it may not bloom as well. If this is the case, you might consider moving it to a sunnier spot.