Spathiphyllum ‘Sweet Isabella’ – vigorous peace lily with broad foliage


Spathiphyllum ‘Sweet Isabella’ is a patented cultivar (2020) that stands out among peace lilies for its broad, dark green leaves and strong, upright petioles. Highly vigorous and fast-growing, this variety brings lush presence and reliable performance indoors.
 
● What makes Spathiphyllum ‘Sweet Isabella’ special


Unlike many compact peace lilies, ‘Sweet Isabella’ develops bold, wide leaves on rigid petioles that resist drooping. This structure gives the plant an upright, architectural habit. Growth is fast under good conditions, making it ideal for those who want a plant that fills space with healthy foliage quickly.
 
● Background and taxonomy


The genus name Spathiphyllum is derived from Neo-Latin, combining the Greek words σπάθη (spathē, “sword”) and φύλλον (phyllon, “leaf”), describing the sword-like spathes that enclose the flowers. The commonly cultivated species Spathiphyllum wallisii was named to honour German plant collector Gustav Wallis (1830 – 1878), who introduced hundreds of tropical plants to Europe, including many orchids. ‘Sweet Isabella’ belongs to this horticultural tradition as a modern selection bred for strength and ornamental quality.
 
● How to care for Spathiphyllum ‘Sweet Isabella’


Light: Thrives in bright, indirect light but tolerates moderate shade. Avoid direct midday sun which can scorch leaves.
Water: Keep soil evenly moist, allowing the top 2 – 3 cm to dry slightly between waterings. Do not leave in standing water.
Substrate: Prefers a rich, well-draining potting mix with organic matter to retain moderate moisture.
Temperature and humidity: Best in 18 – 26 °C with humidity above ~50 %. Tolerates normal indoor humidity but benefits from slightly higher levels.
Fertilizer: Apply a balanced liquid fertiliser monthly during active growth for strong foliage and flowers.
Maintenance: Remove spent spathes and yellowing leaves to encourage fresh growth. Repot every 2 – 3 years when root-bound.
Common problems and solutions
Drooping leaves: Usually from underwatering; recover by watering thoroughly and adjusting schedule.
Brown tips: Linked to dry air, inconsistent watering, or excess fertiliser. Increase humidity and adjust care.
Few or no flowers: Often due to insufficient light; move to a brighter indirect spot.
Yellow leaves: Can be natural aging or sign of overwatering. Check root health and substrate moisture.
 
● Notes for growers


Like other peace lilies, ‘Sweet Isabella’ contains calcium oxalate and should be kept away from pets and children. Its combination of rapid growth, bold foliage, and sturdy petioles makes it especially popular in interior landscaping. While foliage is the main highlight, it also produces the classic white spathes characteristic of peace lilies.
 
● Etymology and naming


The genus name Spathiphyllum comes from Greek spathē (“sword”) and phyllon (“leaf”), referring to the spathes that surround the flowers. The epithet wallisii honours Gustav Wallis, the 19th-century German collector who introduced countless tropical plants to Europe. The cultivar name ‘Sweet Isabella’ reflects its ornamental appeal and is registered under a plant patent from 2020.
 
● Questions about Spathiphyllum ‘Sweet Isabella’


How big does ‘Sweet Isabella’ grow?
This cultivar forms broad clumps around 40 – 60 cm tall with leaves up to 20 – 30 cm long on sturdy petioles.
Does ‘Sweet Isabella’ need high humidity?
It grows in normal indoor humidity but thrives with 50 – 70 %. Higher humidity reduces browning tips on leaves.
Is ‘Sweet Isabella’ pet safe?
No — like other peace lilies, it contains calcium oxalate and can be toxic if ingested.
How often does it flower?
With good light and steady care, it can bloom several times per year, producing classic white spathes.
 
● Add Spathiphyllum ‘Sweet Isabella’ to your collection


Want a peace lily with vigorous growth and bold, upright foliage? Order Spathiphyllum ‘Sweet Isabella’ today and enjoy this modern, distinctive variety indoors.