Glossostigma elatinoides

Scientific name: Glossostigma elatinoides

Family: Scrophulariaceae

Maximum size reached under cultivation: 1 - 2 cm (0.39 - 0.79 inch)

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Recommended pH range: 5.8 - 7.2

Recommended water hardness: 4 - 8°dGH (71.43 - 142.86ppm)

0°C 32°F30°C 86°F

Recommended temperature range: 20 - 26 °C (68 - 78.8°F)

Preferred propagation method: Runners

Native to: Oceania

Growth rate: Fast

Recommended substrate: Gravel

Lighting requirements: Bright

Ideal placement in tank: Foreground

🌿 Family

Scrophulariaceae

🏷️ Common Name

Glosso

🌍 Origin

Glossostigma elatinoides is native to Oceania, particularly Australia, New Zealand, and Tasmania. In nature, it thrives in wet, often temporarily submerged environments like marshes and along riverbanks.

📍 Planting Area

Foreground; this tiny carpeting species is best planted at the front of the aquarium, where its vibrant green leaves form a lush, low-growing mat. Avoid planting it in shaded areas to prevent leggy growth.

🔦 Lighting Requirements

Bright light is essential. If lighting is too low, Glossostigma elatinoides becomes leggy and stretches upward, losing its compact appearance. Ideally, provide full-spectrum lighting for 10–12 hours per day. Supplemental CO₂ greatly enhances compact growth and color.

🌱 Propagation

This plant spreads via runners that emerge from the base of the mother plant. To speed up carpet formation, break apart larger clumps into individual nodes and plant them slightly apart in the substrate. Ensure the delicate roots are fully buried but do not crush the stems during planting. Frequent trimming encourages denser, horizontal growth.

⚖️ Difficulty

Medium; while growth is fast under ideal conditions, this plant demands high light and good nutrient availability. Iron deficiency often shows as pale leaves. Stable CO₂ levels and a nutrient-rich substrate improve overall performance.

📅 Short Description

Glossostigma elatinoides is a beloved carpeting plant in aquascaping circles. Its tiny, oval green leaves form dense mats that give aquariums a well-groomed and natural look. Though small, it plays a big visual role in nano tanks and large displays alike. It is sensitive to shade and poor lighting, so provide clear, direct light to achieve its full aesthetic potential. Regular pruning prevents vertical growth and keeps carpets thick and healthy. Adding iron and other nutrients to the water column and substrate will keep the foliage bright green and vibrant.

🤔 FAQs

• Can Glossostigma be used without CO₂?

  It is possible, but the plant will grow slower and more vertically. CO₂ supplementation is highly recommended to achieve dense carpeting.

• How often should I trim Glosso?

  Trim every 1–2 weeks depending on growth rate. Regular pruning keeps the plant low and prevents it from shading itself or growing upward.

• What causes pale or yellow leaves?

  This is usually a sign of iron or general nutrient deficiency. Consider increasing your dosing of iron-rich fertilizers or root tabs.

• Is Glosso suitable for beginners?

  Yes, with the right lighting and nutrient setup. It’s a great introduction to carpeting plants and aquascaping, especially in smaller tanks.

• Can I grow Glossostigma emersed?

  Yes. In high humidity, Glosso grows well emersed and is often used in dry-start methods before flooding the tank.