Toothed Crust Care (Basidioradulum radula)

This crust fungus prefers low to moderate light typical of shaded woodland habitats rather than direct sun exposure.

• Aim for bright shade or dappled light with no more than 1–2 hours of weak, early morning sun per day on host wood surfaces.
• Protect Toothed Crust from strong midday and afternoon sun, which can dry the substrate rapidly and inhibit fruiting body formation.
• In summer, deeper shade is beneficial, while in autumn and winter a slightly more open canopy still keeps light indirect but helps maintain natural day–night cycles.

This wood-decaying fungus relies on consistently moist but not waterlogged conditions within its woody substrate.

• Ensure the host wood stays evenly moist by allowing the surface to dry slightly between wettings, avoiding standing water on or around the logs.
• If cultivating Basidioradulum radula outdoors, rely on rainfall when possible and supplement only when the wood feels noticeably lighter and dry to the touch.
• Reduce supplemental watering in cool or wet seasons to prevent anaerobic, soggy conditions, which encourage competing molds and bacterial rot in the substrate.

This species is adapted to cool to mild outdoor conditions and tolerates moderate temperature fluctuations through the year.

• Optimal growth generally occurs around 50–70°F (10–21°C), with metabolic activity slowing but not stopping slightly below this range.
• It usually tolerates short drops near 32°F (0°C), but prolonged hard frost below 25°F (−4°C) can damage or halt visible fruiting structures.
• During warmer weather up to about 80°F (27°C), shaded, humid sites help prevent desiccation, while sustained heat above this level tends to dry wood and limit activity.

This wood-decay fungus tolerates a wide humidity range but benefits from consistently moist air when actively growing.

• Aim for 60–90% humidity around developing crusts, especially on cut wood or logs kept under cover.
• Toothed Crust shows humidity stress as dry, brittle, pale patches that stop expanding along the substrate.
• Increase humidity by sheltering logs from wind, lightly misting surrounding surfaces, and reducing direct sun exposure that speeds drying.

Basidioradulum radula is a wood-inhabiting fungus, so it grows on woody substrates rather than conventional garden soil.

• Provide well-drained, moderately decayed hardwood or softwood logs, chips, or thick bark rather than mineral soil or potting mix.
• Ensure the wood substrate stays evenly moist but not waterlogged by using chunky pieces that hold water in pores while allowing air flow.
• Maintain a slightly acidic to neutral environment (pH 5.5–7) by avoiding lime, ash, or strongly alkaline amendments around the colonized wood.
• Improve aeration by stacking logs or coarse wood chunks with small gaps between them instead of packing fine sawdust tightly.

This species is not well suited to conventional container growing, though it can be maintained on colonized wood pieces placed in trays or boxes for observation.

• Use a shallow, ventilated tray that allows air movement over the wood while preventing prolonged standing water beneath it.
• Raise wood pieces on small spacers inside the container so drainage water can escape and surfaces do not remain constantly submerged.
• Choose heavier or wider containers outdoors to prevent wind from tipping over lightweight trays supporting irregular wood sections.

Basidioradulum radula is a wood-decaying fungus that typically gains enough nutrients from its host and usually does not need additional fertilization.

Pruning is not part of normal care for Basidioradulum radula, which naturally forms crust-like fruiting bodies on dead wood.

This species is not managed like a potted plant, so repotting is not relevant; it is instead associated with dead or decaying woody substrates outdoors.

• Transplant only by moving colonized wood rather than trying to lift the fungus itself.
• Choose a similar piece of hardwood in a shaded, humid site when relocating colonized material.
• Move wood during mild weather in spring or fall to limit desiccation stress.
• Keep the substrate evenly moist after relocation to help the fungal network adjust.

Propagation of Basidioradulum radula is usually left to natural spore dispersal and colonization processes rather than deliberate techniques.

This crust fungus is naturally cold hardy on outdoor wood and normally requires no specific winter care.