Also known as Large-Leaf Grass-Of-Parnassus · Largeleaf Grass Of Parnassus
Bigleaf grass-of-parnassus (Parnassia grandifolia) is a charming perennial for moist, shady garden spots, featuring elegant white flowers atop slender stems.
At-a-glance light, water, soil, and growing conditions from plant data
Partial Shade to Full Sun
50% intensity
Tolerates full sun in cooler climates or consistently moist soil. Prefers morning sun and afternoon shade in hotter regions.
Consistently Moist
75% intensity
Prefers damp soil, similar to bog conditions. Avoid drying out.
Acidic, Moist, Well-drained
50% intensity
Moderate
50% intensity
Prefers cooler temperatures. Avoid prolonged exposure to extreme heat.
Low
25% intensity
Does not require heavy feeding. A light feed in spring is sufficient.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Keep soil consistently moist but not waterlogged. Parnassia grandifolia thrives in damp conditions, mimicking its natural boggy habitats.
Water more frequently during hot, dry periods and reduce slightly in cooler, wetter weather. Ensure good drainage to prevent root rot.
Pruning is minimal. Remove any dead or damaged foliage at any time of year to maintain a tidy appearance and prevent disease.
Deadheading spent flower stalks can encourage more blooms and prevent self-seeding if not desired.
Propagation is typically done by division of clumps in spring or autumn. Carefully separate the root ball into smaller sections, ensuring each section has roots and at least one growth bud.
Replant immediately in suitable moist soil.
Repot Parnassia grandifolia every 2-3 years or when the plant outgrows its container. Spring is the ideal time to repot.
Use a well-draining, moisture-retentive potting mix, preferably amended with peat or compost to simulate bog conditions.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Bigleaf Grass-Of-Parnassus (Parnassia grandifolia)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Celastrales |
| Family | Celastraceae |
| Genus | Parnassia |
| Species | Parnassia grandifolia |
Similar in genus Parnassia
Answers based on plant encyclopedia data
