How to Grow Anthrium
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Anthrium
Anthurium andraeanum
flowerAnthurium is a tropical houseplant prized for its distinctive waxy, heart-shaped spathes in red, pink, white, or burgundy that surround a central spadix. The plant produces glossy, dark green foliage and blooms year-round indoors under proper conditions. It thrives as a potted ornamental plant in homes and offices, known for its longevity and air-purifying qualities.
When should you plant Anthrium in your zone?
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Example Anthrium timeline · Pittsburgh, PA (Zone 6b)
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Plant Anthrium
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Anthrium blooms
Around Jul 16≈ 90 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Anthrium dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 11-12 (best grown indoors in cooler climates; ideally 65-80°F year-round)
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Get my Anthrium timeline →Growth Stages
Establishment
4-6 weeksYoung plant with small leaves and developing root system in moist potting mix
Maintain high humidity and bright indirect light. Avoid fertilizing for first 4-6 weeks. Keep soil warm (70-75°F).
Vegetative Growth
6-8 weeksExpansion of foliage with emergence of new leaves and strengthening of stems
Continue consistent watering and humidity. Begin light feeding with balanced, diluted fertilizer. Provide bright indirect light. Ensure air circulation.
Budding & Flowering
3-4 weeks per bloom cycle; flowers last 6-8 weeksAppearance of flower spathes (modified leaves) ranging in color; central spadix becomes prominent
Maintain warm temperatures (75-80°F) and humidity. Continue regular watering without waterlogging. Feed every 4-6 weeks with diluted fertilizer. Provide bright indirect light to enhance color.
Bloom Maintenance
Continuous (several blooms per year with proper care)Mature flowers with persistent spathes; plant continues producing new flower buds sequentially
Remove spent flowers to encourage new blooms. Maintain consistent warmth and humidity. Continue moderate fertilizing. Prune any yellow or damaged leaves.
Rest Period (Minimal)
2-3 months (winter)Slight reduction in growth and flowering during winter months; plant remains evergreen
Reduce watering slightly but maintain soil moisture. Lower fertilizing frequency. Maintain 65-70°F if possible. Provide supplemental light if natural light decreases.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity; spray leaves with water or neem oil weekly. Isolate infested plant from others.
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Wipe with alcohol-soaked cotton swab; spray with insecticidal soap every 7-10 days until clear.
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Remove manually with brush; apply neem oil or horticultural oil spray fortnightly.
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Allow top soil to dry slightly between waterings; use sticky traps; apply sand layer on soil surface.
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Repot in fresh, dry, well-draining mix. Remove blackened roots. Reduce watering frequency.
Uses
Not for consumption
CulinaryAnthurium is toxic if ingested due to calcium oxalate crystals. It is ornamental only and should not be eaten by humans or pets. [source]
Air purification
HouseholdNASA studies and subsequent research indicate that Anthurium effectively removes ammonia, formaldehyde, and xylene from indoor air, improving household air quality. [source]
Cut flower arrangements
CraftAnthurium flowers are popular in floral design and tropical arrangements due to their long vase life (6-8 weeks), exotic appearance, and availability in multiple colors. [source]
Interior decoration and landscaping
HouseholdWith year-round blooming and elegant heart-shaped flowers, Anthuriums enhance modern, tropical, and contemporary interior designs in homes, offices, hotels, and commercial spaces. [source]
Pollinator support (in tropical gardens)
WildlifeIn native tropical regions, Anthurium flowers attract pollinators including insects and hummingbirds, supporting local ecosystems and biodiversity. [source]
Harvest Tips
Anthuriums are ornamental flowers meant to be enjoyed on the plant or cut for arrangements. Cut flower spathes with a clean knife once fully colored and mature (typically 4-6 weeks after emergence). Cut at the base of the flower stalk. Flowers last 6-8 weeks in a vase with fresh water changed every few days. Do not harvest more than 25% of blooms at once to preserve plant vigor.
Fun Facts
- 🌱 Anthuriums are native to the rainforests of Colombia and Ecuador, where they grow as epiphytes on trees, which explains their preference for airy, well-draining potting mixes and high humidity.
- 🌱 The waxy 'flowers' are actually modified leaves called spathes that surround the true flower-bearing spike (spadix); the spadix contains hundreds of tiny true flowers that are pollinated by insects in nature.
- 🌱 With proper care, Anthuriums can bloom year-round indoors and live for many decades, with some specimens producing flowers continuously for 30+ years in the same home.
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