Is The ZZ Plant Poisonous To People, Children, Cats and Dogs? Will last years seeds grow? Feathers in the woods I'm so proud of my first rock garden arrangement. All the large rocks came from my 10 year old son's rock collection. The pot has this beautiful earthy brown under the grey mermaids tail (aka coral cactus) sighting , these beauties grow in those rippled, fin shaped waves that look like coral and give each plant its own personality! they thrive in bright light and dry