Sagittaria Platyphylla

Sagittaria platyphylla is an arrowhead species from the swamps and shallow waters of southern North America. Underwater it forms flat, ribbon-shaped leaves 20–40 cm tall; when it grows above the water, it produces lance- or arrow-shaped leaves on long stalks and white flowers. In some countries, such as Australia, it has escaped into the wild and become an invasive plant that chokes waterways; trimmings and surplus plants must never be dumped into natural waters.

The roots are buried with the crown left exposed. It is planted in the background or along the sides, leaving 6–8 cm between plants. In ponds it can also be planted in the shallow margin zone.

• Light: Medium.
• CO₂: Not required.
• Fertilizer: Root tabs speed up growth.
• It spreads through underground runners; pull out surplus daughter plants. Cutting the emersed leaves that reach the surface keeps the plant in its submerged form.