Core Values Leaf Look Alikes: Learn to Spot Poisonous Plants! Watch Out for These Troublemakers: Poison Ivy: Leaves of three, let it be. Shiny, jagged edges. Poison Oak: Also in groups of Photinia black spot disease treat and protect against spots Nature & Garden Native Plants Kitsap Conservation District Fat Hen's growing fast and green right now have you met her yet? You'll find it in garden beds, field margins, compost heaps and forgotten corners. A plant that shows up