Also known as 'āhinahina · East Maui Silversword · Haleakala Silversword
Haleakalā Silversword (Argyroxiphium sandwicense) is an iconic, endangered Hawaiian endemic. It features silvery foliage and a dramatic, single flower stalk. Found in hig
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Requires bright, direct sunlight for optimal growth and health. Protect from intense afternoon sun in extremely hot climates.
Infrequent
25% intensity
Allow soil to dry completely between waterings. Avoid overwatering, which causes root rot.
Well-drained, rocky
50% intensity
Moderate
50% intensity
Prefers cool to moderate temperatures, ideally between 15-25°C. Protect from frost.
Very Low
10% intensity
Extremely sensitive to fertilizers. Fertilize very rarely with a highly diluted solution during active growth.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water sparingly, allowing the soil to dry out completely between waterings. Overwatering is detrimental and can lead to root rot. In its native arid habitat, it relies on mist and infrequent rainfall.
Mimic these conditions by providing thorough but infrequent watering.
Pruning is generally not required for Haleakalā Silversword. Its natural growth habit is striking and requires no shaping. Remove any dead or desiccated leaves at the base of the plant only to maintain tidiness.
Avoid cutting into healthy tissues.
Propagation is challenging and best left to experienced growers. Seeds require specific stratification treatments and a very well-draining, mineral-rich medium.
Vegetative propagation is difficult and not commonly practiced. Patience and precise conditions are crucial for success.
Repotting is rarely necessary for this slow-growing, long-lived species. If repotting is essential, choose a slightly larger pot with excellent drainage.
Use a gritty, mineral-based potting mix mimicking its native volcanic substrate. Handle the root system with extreme care.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Haleakalā Silversword (Argyroxiphium sandwicense)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Argyroxiphium |
| Species | Argyroxiphium sandwicense × Dubautia menziesii |
Similar in genus Argyroxiphium
Answers based on plant encyclopedia data
