Description
Red Stem Thalia – Thalia geniculata (Red-Stemmed Alligator Flag)
Red Stem Thalia (Thalia geniculata) is a bold, tropical-style pond plant prized for its striking red stems and large, upright blue-green leaves. This fast-growing marginal aquatic plant adds height, structure, and dramatic color contrast to ponds, water gardens, and bog landscapes.
In addition to its impressive foliage, Red Stem Thalia produces delicate purple flower spikes that rise above the leaves during the warm season, attracting pollinators like butterflies and bees. Its strong vertical growth makes it an excellent background plant for larger ponds or naturalized water features.
🌿 Care Instructions
Lighting:
Full sun for best growth and strongest red stem coloration.
Water Conditions:
Prefers shallow water or consistently wet soil. Ideal for pond margins and bog gardens.
Temperature & Hardiness:
USDA Hardiness Zones 8–11 (can be grown as an annual or overwintered indoors in cooler climates).
Growth Rate:
Fast-growing under optimal conditions.
Fertilization:
Use aquatic fertilizer tablets to support vigorous growth.
Maintenance Tips:
- Trim back older leaves as needed
- Remove spent flower spikes
- Divide rhizomes to control size and encourage healthy growth
🌱 Planting Instructions
- Plant in 2–6 inches of water or saturated soil
- Place in aquatic baskets for easy management
- Space plants 18–24 inches apart
- Position in full sun for best color and growth
- Ensure stable water levels for consistent development
📏 Size & Growth
- Height: 36–72 inches (3–6 feet tall)
- Spread: 18–36 inches wide
- Upright stems with large paddle-shaped leaves and purple flowers
🌟 Why Choose Red Stem Thalia from Quinn’s Fins?
- Bold red stems add unique color contrast
- Tall, architectural plant for pond backdrops
- Produces attractive purple flower spikes
- Ideal for ponds, bogs, and large water features
- Carefully selected and shipped for strong growth
