Buckwheat for Bees

Being a new beekeeper and wanting to have plants for the bees to forage, buckwheat seems to be a good nectar source for honey beekeepers to provide for bees. I bought two packages of buckwheat seed as a lark

at Beech Mountain Beekeeping and sowed the seed randomly in the field near the beehive.  
Typically the seeds should germinate and emerge within three to four days. Plants grow rapidly, producing small heart-shaped leaves with slender, hollow stems. Surprisingly the flowers began to appear about three weeks after planting. 
Buckwheat (Fagopyrum esculentum) is a broadleaf plant native to northern Asia. The seeds are brown in color, roughly the size of a soybean, irregularly shaped, with four triangular surfaces. At the peak of flowering, the buckwheat plant has striking white petals. After a flower is pollinated, a full-sized seed will form within 10 days. Seeds appear and mature earlier on the lower stem, with seed development continuing up the stem as the plant matures.  The bees are very happy!