Caring for Pūkēnikēnī (Lobelia grayana): Hawaii's Endangered Native Lobelia

Lobelia grayana, known in Hawaiian as pūkēnikēnī, is a stunning endemic lobelia found only in Hawaii's wet forests. Cultivating it requires replicating its cloud-forest niche:

Light and Temperature

• Bright, indirect light / partial shade—mimic dappled forest canopy
• Ideal range: 60–75°F (16–24°C); protect from frost and sustained heat

Growing Medium

• Well-draining, organic-rich mix: peat moss, perlite, worm castings
• Excellent drainage is critical—no standing water

Water and Humidity

• Keep evenly moist; let top inch dry slightly between waterings
• Moderate to high humidity: mist regularly or use a humidifier

Feeding and Maintenance

• Balanced liquid fertilizer (diluted) during spring/summer growth
• Generally pest-resistant; watch for mealybugs, spider mites—treat with neem oil or insecticidal soap
• Minimal pruning needed; naturally compact

Propagation

Spring/early summer stem cuttings: non-flowering stems, rooting hormone, warm humid conditions until rooted.

Conservation Note

Pūkēnikēnī is endangered. Source only from reputable nurseries practicing ethical propagation. Cultivation can support ex situ conservation—but wild populations must remain the priority.