Gonocarpus micranthus
Gonocarpus micranthus · Haloragaceae
The gardener's calendar
Ideal time to plant gonocarpus micranthus: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Common name
- Smallflower Gonocarpus
- Family
- Haloragaceae
- Plant type
- Herbaceous aquatic or semi-aquatic plant
- Foliage
- Deciduous to semi-evergreen depending on climate
- Flowering
- Spring to summer
- Hardiness
- Moderate, prefers temperate to warm climates
- Origin
- Australia and Pacific regions
- Growth
- Rapid in hydrophilic conditions
Care
Watering and humidity
Gonocarpus micranthus thrives in moist, aquatic or marshy environments. Keep the substrate constantly wet or submerged depending on its location (aquarium, pond or very moist soil). In pots, never let the soil dry out completely. Adjust frequency to your climate: more frequent watering during hot and dry periods.
Light exposure
This plant appreciates bright light, ideally from partial shade to bright light. In an aquarium or pond, place it near the surface to benefit from the best available light. In very hot climates, light afternoon shade can prevent water stress.
Soil type and substrate
Gonocarpus micranthus prefers rich, organic and well-draining substrates for emergent cultivation, or enriched aquatic substrate for aquatic cultivation. Use a mix of potting soil and sand or a specialized aquatic plant substrate. Slightly acidic to neutral pH is optimal.
Fertilization
Fertilize moderately during the growing season (spring-summer) with diluted fertilizer for aquatic or herbaceous plants. In an aquarium or pond, monthly application is sufficient. Reduce application in autumn-winter. Favor balanced formulas without excess nitrogen.
Pruning and maintenance
Prune regularly to maintain compact form and encourage branching. Remove dead or declining stems. Light pruning every 4 to 6 weeks during active growth stimulates development. Cuttings can be replanted to propagate the plant.
Diseases and pests
Watch for filamentous algae growth if nutrients are excessive or water is stagnant. Aphids can occasionally affect emergent plants: treat by rinsing with water or manual cleaning. Good water circulation and regular hygiene prevent most problems.
Did you know?
Gonocarpus micranthus is native to subtropical regions of Australia and the Pacific, where it naturally colonizes wetlands, streams and marshes. Its name "Gonocarpus" means "angular fruit" in ancient Greek, reflecting the particular morphology of its fruits. This plant has become popular in French aquarium keeping since the 1990s as an easy freshwater aquarium plant, appreciated by enthusiasts for its fine foliage and rapid growth.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
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- Gonocarpus tetragynusGonocarpus tetragynus
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- Siberian water milfoilMyriophyllum sibiricum
- Gonocarpus teucrioidesGonocarpus teucrioides
Tips generated and checked by Viridia — adapt them to your local climate.