Best Fertiliser for Anthuriums

Anthuriums are heavy feeders compared to many other indoor plants. To maintain glossy green leaves and a long flowering season, they require regular fertilising. Without the right nutrition, anthuriums often suffer from pale leaves, stunted growth, and fewer blooms. Using a balanced fertiliser ensures they receive both the macronutrients and trace elements needed for continuous health and flowering.

Because they originate from tropical rainforests, anthuriums are accustomed to nutrient-rich, free-draining environments. In pots, those nutrients are quickly depleted, making regular fertilising essential. The best fertiliser is one that supports both foliage growth and flower production without overwhelming the roots.

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Choosing the Right Fertiliser for Anthuriums

A balanced fertiliser with equal parts nitrogen, phosphorus, and potassium (such as NPK 20-20-20) works best for anthuriums. This formula supports healthy leaves, strong roots, and reliable flower production.

Liquid Fertiliser: Ideal for fast uptake. Apply every 4–6 weeks during the growing season (spring through early autumn).
Powdered Fertiliser: Can be mixed with water for a soluble feed. This ensures consistent nutrient delivery without overloading the soil.
Micronutrients: Anthuriums benefit from calcium and magnesium for stronger stems and trace elements like iron to prevent leaf yellowing.

In Australia, feeding every month from September to April keeps anthuriums blooming. In winter, when growth slows, reduce fertilising to every 8 weeks or pause until spring. Always water before and after fertilising to prevent root burn.

For best results, products like CompleteGrow All Purpose Liquid NPK 20-20-20 or CompleteGrow Powdered 20-20-20 Soluble Nutrient Fertiliser provide the exact balance required for strong leaf growth and prolific flowering.

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FAQs: Fertilising Anthuriums

What is the best fertiliser for anthuriums?
A balanced NPK fertiliser such as 20-20-20, which provides even nutrition for leaves, roots, and flowers.

Can I use orchid fertiliser on anthuriums?
Yes, but ensure it includes a balanced NPK ratio and micronutrients. General-purpose CompleteGrow fertilisers are more reliable for consistent feeding.

How often should I fertilise anthuriums?
Every 4–6 weeks during the growing and flowering season. Reduce feeding in winter when growth slows.

Why are my anthurium leaves turning pale?
This is usually a sign of nutrient deficiency, often iron or nitrogen. Regular feeding with a complete fertiliser will correct this.