Najas horrida "Lake Edward"

Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

Usually planted in the background where its rigid, thorny structure can be showcased. It can also be left floating, though it looks best when anchored. It provides excellent shelter for small fish.

Botanical form

Stem

Characterized by stiff, deeply serrated leaves that appear almost thorny or 'horrid', hence its name. It has a robust, bushy growth habit and is generally darker green compared to other Najas.

Growth

Fast

Fast-growing but somewhat more controlled than standard Najas species. It requires regular trimming if used in an aquascape to prevent it from taking over.

Substrate

None

Column fertilization

Recommended

Readily absorbs macro and micronutrients directly from the water. A consistent liquid fertilization regime is recommended to maintain its health and rigid structure.

Root fertilization

None

Can develop a surprisingly capable root system for a Najas. While not strictly necessary, planting it in a nutrient-rich substrate will encourage stronger, more upright growth.

Trimming

Regular

Because the stems are somewhat brittle, it's often easier to pinch or snap the stems rather than using scissors. Replanting the tops works well, but be careful of the sharp-feeling leaves.

Propagation

Cuttings

Propagates through fragmentation or by taking stem cuttings. Even small pieces left floating will quickly develop into new bushes.

Sensitivity

Moderate

Like most Najas, it can melt if exposed to high doses of liquid carbon or sudden massive changes in water chemistry. Generally adaptable and robust.

Layout role

Midground

Offers a unique texture with its 'spiky' appearance. It can be used as a rugged background plant or as a structural element in wild-looking biotope setups.