Why is my polka dot plant growing like this? : r houseplants Plant Based Dairy Sampler Box Plant Veda Planters Flower Pots + Garden Planters Terrain Japanese Knotweed Facts! It might surprise you, but this fast growing, bamboo looking invasive plant is related to rhubarb! Japanese Knotweeds, originating from East Asia, belong to a family called the Polygonaceae, which are Gravel Garden Maintenance Beth Chatto Gardens