Aponogeton Ulvaceus Bulb - African Aquarium Plant You will get 1 Aponogeton Ulvaceus Bulb ready to place in your aquarium. Grows when water temperatures are between 65-72F. The plant will start growing after a week of submerging the bulb Grows fast and large in a few weeks under proper conditions Make your aquarium stand out with this beautiful and hard to find plant Perfect for 10+ gallon aquariums. Not recommended for aquariums with water temperatures above 72F.