The Cape-pondweed is a rarely cultivated as a pond plant. The most striking features are its biennial inflorescences with large white tepals and purple-red to black pollen sacks. The flowers rise out of the water between the up to 40 cm long and up to 8 cm wide floating leaves. They are pollinated by insects and form large, green fruits that can be grown into young plants with a little patience.
Aponogeton are seasonal plants that form a tuber for survival, from which they sprout again. To cultivate them permanently, you must provide the plant with a nutrient-rich substrate and a sunny place in the pond.
The plant is not winter hardy and hibernates best indoors, as is the case with lotus (Nelumbo nuzifera) and tropical water lilies.
A plant portrait of this pond plant rarity with some more pictures can be found at Heimbiotop.de (in German only).