For all the pollination achievements follow this same rule. Use your map! Yellow dots are flowers which you can harvest pollen from, and blue dots are flowers that need to be pollinated. So simply go to the yellow dots, harvest honey ( to lock on, to harvest), then take it to the blue dots and deliver the pollen ( to lock on, to deliver). You can keep track of how many flowers you have left to pollinate by pressing start. It'll show a picture of a flower with XX/XX with the X's being flowers you've pollinated/total flowers to pollinate. Once you pollinate the final flower in that mission you'll get the achievement.
This one can be done on mission 1.2.