Curly-leaf Pondweed Control

Curly-leaf Pondweed is an aggressive invasive species. It begins to grow much earlier in the season than other weeds, leading to an uneven resource distribution that chokes out native species.

Optimum results may be achieved by applying our Dock & Swim Area Products. Another option would be Hydrothol Granular. Apply evenly early in the day under calm, sunny conditions at 60F or higher in accordance with label instructions.

Our lake rakes, including our mechanical LAKEMAID®, are an excellent mechanical alternative to keep Curly-leaf Pondweed plants from ever starting to grow.

If you have any questions or would like to speak to us about curly-leaf pondweed control, please feel free to call us at: 1-877-428-8898

Identify Curly-leaf Pondweed

(Potamogeton crispus)

Curly-leaf Pondweed can be identified through a variety of physical characteristics. It appears reddish-brown in the water, but is actually green when examined out of water. Its leaves are wavy, stiff and crinkled, with a "crispy" texture (0.5 in. wide and 2-3 in. long). The leaves are arranged alternately around the stem and become more dense toward the end of the branches. The leaf tip is blunt and there are small teeth visible along the edge of the leaf (giving the leaf a serrated edge).

Curly-leaf Pondweed has slightly flattened stems and produces winter buds called turions (small, brown pine cones on shortened branches along stem). Flower stalks, when present, stick up above the water surface in June. Curly-leaf Pondweed begins growing in early spring before most pondweeds (leading to a major competitive advantage) and can form dense mats early on in the spring, but by mid summer, it tends to die off a bit.

Curly-leaf Pondweed prefers a habitat where it can grow in depths of up to 15 ft. It also tolerates low water clarity and will readily invade disturbed areas.

Curly-leaf Pondweed is often confused with Clasping-leaf Pondweed, but the leaves of Curly-leaf have a serrated edge. It also has a unique life cycle (starts growing before most plants, dies off midsummer).

For easy curly-leaf pondweed control, we recommend using our Dock and Swim Area Products.