A good winter
Unlike previous years, this past winter was a real winter. There were low temperatures and there was precipitation in the form of both rain and snow. This, contrary to what one might believe, is very important for bees. Cold weather, in fact, brings them into a condition called brood block. This means that the queen no longer lays eggs and the bees, as they do not have to look after the new hatchlings, consume less honey. Less consumption obviously leads to a longer shelf life, allowing for a good spring recovery.
Then, unfortunately, there was an increasing drought, which compromised the production of spring honeys such as dandelion and cherry. However, the preconditions for a good acacia bloom persisted.