Can we observe the differences between plant species? How can we tell the difference between edible crops we have planted and plants we may want to remove or that may be even be poisonous?
What is a weed? How can a plant be a weed in one location and a lawn or a food/medicine in another? How can we understand the role of volunteer plants in our gardens? How can using our observation skills help us to identify common plants in the garden? What are the benefits and uses of weeds or volunteer plants? How can we make use of plants that we choose to remove from our garden?