Nature Guelph was pleased to welcome species at risk biologist Graham Buck on April 19 for a presentation on Milkweeds. Graham presented the ten species of Asclepias native to Ontario, including four common species, three uncommon species, three very rare species, and one extirpated species. We learned that the less common species are largely found in the Carolinian zone, and that most species prefer well drained or sandy soils. Graham shared his field botanist experiences with each species, provided cultivation tips for gardening, and commented on the utility of each species for monarch butterflies. The evening concluded with a native plant seed swap.