Some say that they fetch their young from the flower of the callystrum, others assert that they bring them from the flower of the reed, others, from the flower of the olive. And in respect to the olive theory, it is stated as a proof that, when the olive harvest is most abundant, the swarms are most numerous. As a general rule, there is no honey before the rising of the Pleaides. We know that bee's wax is actually secreted from glands on the bees belly. Propolis which is used to seal cracks in the hive is gathered from plants.
Honey comes from flower nectar mixed with enzymes in the bees' stomach.
He was correct about the honey coming after the rising of the Pleaides, these 7 stars in the constellation of Taurus were probably not visible to someone in Greece until late summer or fall.