I don't know if it qualifies at all as a challenge, but I completed both a chart for flower colors up to Mela and all crosses, plus a chart for foliage up to scandens by only using common seeds and crossbreeding. I've found 6 magic plants. I love to swat a lot of bugs and am getting good at it, have 45 of 48, and haven't upgraded my net.

Next goal is finding more species ... anyone know the best plants to use the mutation liquid on? I really don't want to waste my hard earned "money" on plants that are going to change into something I already have!! LOL