Also known as Compressed Rush · Round-Fruit Rush · Round-Fruited Rush
Flattened Rush (Juncus compressus) is a clump-forming perennial with wiry, upright stems and small, inconspicuous flowers, often found in damp or wet environments.
At-a-glance light, water, soil, and growing conditions from plant data
Moderate to High
75% intensity
Prefers full sun to partial shade. Tolerates a range of light conditions.
High
75% intensity
Prefers consistently moist to wet soil conditions.
Clay, Loam, Sandy; Moist to Wet
50% intensity
Moderate
50% intensity
Prefers cool to moderate temperatures. Can tolerate a range but avoid extreme heat.
Aquatic
50% intensity
Low
25% intensity
Requires minimal fertilization; over-fertilizing can be detrimental.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Non-toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Juncus compressus thrives in consistently moist to wet soil. Water regularly to keep the soil saturated, especially during warmer months. Avoid letting the soil dry out completely.
In containers, ensure the drainage holes are submerged in a tray of water to mimic bog-like conditions.
Pruning is primarily for aesthetic purposes or to remove dead or damaged foliage. Trim back old or yellowing leaves in late winter or early spring before new growth emerges.
This helps maintain a tidy appearance and encourages vigorous new shoots.
Juncus compressus can be propagated by division or from seed. Division is best done in early spring.
Carefully separate the root ball into smaller sections, ensuring each has viable roots and shoots, and replant immediately. Seeds can be sown in moist soil in spring.
Repot Juncus compressus when it becomes root-bound, typically every 2-3 years. This is best done in spring. Choose a pot that is slightly larger than the current one.
Use a well-draining, but moisture-retentive potting mix, and ensure the new pot has adequate drainage.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Flattened Rush (Juncus compressus)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Poales |
| Family | Juncaceae |
| Genus | Juncus |
| Species | Juncus compressus |
Similar in genus Juncus
Answers based on plant encyclopedia data
