I'm a plant novice. I have two Madagascar Lace plants in each of two tanks. They grow in cycles going dormant for rwo to three months after growing for about six months. My tanks are low tech, par about 20, little or no ferts, flourite substrate. When they are producing I've seen new leaves grow 2-3" in a day and the flower stalk grow 6-8" in day. Most of the time they just are there and look interesting.