Photo: John BarklaCC BY 4.0via iNaturalistresized / cropped
Congested Speargrass Plant Care
Aciphylla congesta Cheeseman
Updated · Sources · How we source care data
This plant is recognized by its distinct spiky, needle-like leaves that form a dense cluster. Originally from New Zealand, Aciphylla congesta is sought after by plant collectors for its unique foliage texture and striking architectural presence in gardens.
Every 7–14 days
Full sun to partial shade
50–75°F
40–70%
At a glance
How do you care for Congested Speargrass?
Water Congested Speargrass every 7–14 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–75°F (10–24°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
Where Is the Congested Speargrass Native To?
What Is the Congested Speargrass?
Congested Speargrass (Aciphylla congesta) belongs to the Apiaceae family within the Aciphylla genus. Congested Speargrass is native to New Zealand. Congested Speargrass is also known as Congested Spaniard.
Congested Speargrass displays a clumping perennial growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Congested Speargrass produces small white or greenish flowers in dense clusters.
Leaf size: approximately 12 inches.
How Often Should You Water a Congested Speargrass?
Aciphylla congesta requires watering every 7–14 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–14 days
Let soil partially dry between waterings
What Light Does the Congested Speargrass Need?
Congested Speargrass thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Congested Speargrass Prefer?
Aciphylla congesta grows best at temperatures of 50–75°F. Congested Speargrass prefers humidity levels of 40–70%.
Temperature
50–75°F
Humidity
40–70%
What Soil Mix Works Best for a Congested Speargrass?
Well-draining sandy soil with good organic matter content. Good drainage is essential for Congested Speargrass to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Congested Speargrass?
Feed Congested Speargrass every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Congested Speargrass?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Congested Speargrass?
Congested Speargrass can be propagated through seeds, division of offsets. Similar propagation techniques also apply to mount cook speargrass plant care, which shares the same genus.
Is the Congested Speargrass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Congested Speargrass, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Congested Speargrass?
Congested Speargrass is susceptible to aphids, caterpillars, slugs. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Congested Speargrass Need?
Congested Speargrass grows outdoors in USDA Zone 7a – 8b. It survives winters down to planting zone 7a. Congested Speargrass is native to New Zealand.
Hardiness Zone
Zone 7a – 8b
Keep exploring plants
Congested Speargrass is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Aciphylla genus — compare its care with other Aciphylla species on PlantoScan.
Aciphylla is part of the Apiaceae plant family — browse all Apiaceae genera and species.
Congested Speargrass thrives in bright light and direct sun — see other bright-light plants.
More Aciphylla Species
Other Aciphylla species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Aciphylla congesta Cheeseman, family Apiaceae (first published in Trans. & Proc. New Zealand Inst. 47: 44 (1914 publ. 1915)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Congested Speargrass, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: John Barkla, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 7a – 8b, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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