Khadar by Pepper North

Lalani had just found her birth mother in the secluded town of Wyvern when the change hit. Her joy quickly turned to tears when Lalani lost her to an accident before they could really get to know each other. A clash with a neighboring family makes her withdraw into the big, lonely house. She’s not coming out for anything.
Known for his ties with nature, Khadar has taken on the additional role of assisting the townspeople with growing food to sustain them. When he appears at the first gathering featuring some of the crops grown in the community garden, he discovers the most desirable treat of all—his mate.
Change has come to Wyvern. A centuries-old pact between the founders and their powerful allies could save the inhabitants of the city once again, but only a dragon Daddy can truly guard his mate from harm.