Average isn't bad. Group these plants next to another established or desired landscape element that also needs average moisture. They can be social drinkers. This color indicates a plant has definite water requirements. Others could group these plants next to another established or desired landscape element that also needs moist soil.
Larval requirements are more diverse.
Given a choice, a female Monarch finds the most poisonous plants on which to lay her eggs. One doctor I know says that such things taste so bad, children would likely spit it out before they could get sick. Still, I'm not going to plant said vegetation in beds with edible flora and fauna and most will go in the front yard where my children are not allowed to play anyway for other safety reasons. Under any circumstances, have the number for the local Poison Control Center near the phone. The importance of providing safe habitats for butterflies, hummingbirds, and other assorted creatures, including yourself.