Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

Best suited for the midground or background of the aquarium, depending on the tank's height. Plant stems in small groups to create a dense, bushy appearance. Ensure it is not shaded by larger, broader-leaved plants.

Botanical form

Stem

An upright stem plant with pairs of oppositely arranged, lanceolate leaves. The leaves are typically a bright, fresh green color and have slightly serrated edges. Its stems are relatively sturdy compared to other delicate aquatic plants.

Growth

Slow

Grows at a moderate to fast pace when provided with strong lighting and CO2 injection. Without CO2, its growth is significantly slower but manageable. Frequent trimming encourages lateral shoots and a denser bush.

Substrate

High

Gratiola officinalis benefits significantly from a nutrient-rich aquasoil to support its strong vertical growth and robust root system. A substrate depth of at least 5 centimeters provides the necessary space for its thick root base to securely anchor the thick stems against water currents. While it can absorb some nutrients via its leaves, a fertile bottom layer promotes faster establishment and prevents premature lower leaf degradation.

Column fertilization

Recommended

Readily absorbs nutrients through its leaves, making water column dosing effective. Regular dosing of a comprehensive liquid fertilizer ensures robust growth. Potassium and iron are particularly important for maintaining leaf health and color.

Root fertilization

None

Benefits from a nutrient-rich substrate, as it develops a healthy root system. Root tabs can provide a long-term nutrient source, especially in inert gravel or sand. A rich base encourages thicker stems and larger leaves.

Trimming

Occasional

Trim the tops of the stems to maintain the desired height and encourage branching. The bottom portions will sprout new side shoots if healthy. Discard the lower stems if they become bare and replant the top cuttings instead.

Propagation

Cuttings

Easily propagated by taking stem cuttings and replanting them into the substrate. Cut below a leaf node and strip the lowest leaves before planting. Side shoots that develop after trimming can also be detached and planted.

Sensitivity

Moderate

Can be sensitive to sudden changes in water parameters, leading to temporary stunted growth. It requires clean water; high organics can lead to algae growth on its leaves. Adequate flow is needed to keep the leaves free of debris.

Layout role

Midground, Background

Used to create bright green vertical accents or dense bushes in the midground to background. Its distinct leaf shape provides excellent textural contrast against finer or broader leaves. It fits well in Dutch-style and nature aquariums.