Plant Tycoon features the same unique gameplay as Fish Tycoon. The game runs in real-time which means your plants will grow even you turn off your computer.
This is a sim game where you nurture plants and experiment with rare species. The goal of this tycoon game is to breed and cross breed plants until you find all the 6 Magic Plants and solve the genetic puzzle.
If you like sim game(i.e. Fish Tycoon), Plant Tycoon is just what you're looking for.