One Waterelon Seed by Celia Barker Lottridge, illustratedby Karen Patkau

From chapters.ca:
In this deceptively simple counting book, Max and Josephine tend their garden while readers follow along, counting from one to ten as the garden is planted. Then readers can count in groups of tens as the garden is harvested, while they search through the pictures for the many small animals that are hiding throughout.