Also known as Least Adder's-Tongue Fern
Least adder's-tongue (Ophioglossum lusitanicum) is a small, delicate fern found in damp, open habitats. It features a single fertile frond with a tongue-like sporangial s
At-a-glance light, water, soil, and growing conditions from plant data
Partial Shade
50% intensity
Prefers bright, indirect light. Avoid direct sunlight, which can scorch the fronds.
Consistent Moisture
50% intensity
Keep soil moist but not waterlogged. Allow top layer to dry slightly between waterings.
Sandy, Loamy, Acidic, Neutral
50% intensity
Moderate
50% intensity
Thrives in average room temperatures, ideally between 18-24°C. Protect from frost.
Low
25% intensity
Feed sparingly with a diluted balanced fertilizer once during the growing season.
Safety information from plant toxicity data
| Attribute | Value |
|---|
None
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Ophioglossum lusitanicum prefers consistently moist soil, but avoid waterlogging, which can lead to root rot. Water thoroughly when the top centimeter of soil feels dry.
Reduce watering during its dormant period to prevent excessive moisture, especially in cooler temperatures.
Pruning is generally not required for Ophioglossum lusitanicum, as it is a small, slow-growing plant. Remove any dead or damaged fronds as they appear to maintain plant health and aesthetics.
Avoid cutting healthy green fronds.
Propagation is typically done by careful division of established clumps during the dormant season. Gently separate the rhizomes with a few roots attached and replant them in suitable growing medium.
Seed propagation is challenging and slow.
Repot Ophioglossum lusitanicum infrequently, only when it becomes root-bound, typically every 2-3 years. Use a well-draining potting mix.
Handle the delicate rhizomes with care during repotting to minimize stress and damage.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Least Adder's-Tongue (Ophioglossum lusitanicum)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Polypodiopsida |
| Order | Ophioglossales |
| Family | Ophioglossaceae |
| Genus | Ophioglossum |
| Species | Ophioglossum lusitanicum |
Similar in genus Ophioglossum
Answers based on plant encyclopedia data
