Big sheath mushroom
Also known as
Stubble rosegill, Sheathed rosegill
Keep this plant’s care guide close at hand.
Get the appAbout Big sheath mushroom
Volvopluteus gloiocephalus (formerly Volvariella gloiocephala) is a large, saprotrophic mushroom recognized by its sac-like volva at the base of the stem and salmon-pink spore print. The cap is typically 5–15 cm across, whitish to grey-brown with a darker center, and often viscid (slimy) when moist; margins may become slightly striate with age. Gills are free from the stem, starting white and turning pink as spores mature. The slender, white stipe lacks a ring and arises from a prominent, membranous sheath (volva) in the soil. It favors nutrient-rich, disturbed sites such as compost heaps, straw or stubble fields, manure-enriched lawns, and woodchip beds, fruiting from late spring through autumn in temperate regions. Although regarded as edible in some sources, it is easily confused at the button stage with deadly white Amanita species; identification should be made only when gills have pinked and traits are clear. In cultivation, it thrives on well-pasteurized, nitrogen-complemented straw or compost with high humidity and good fresh-air exchange.
Taxonomy
Properties & Requirements
How to care for Big sheath mushroom
Water
Maintain substrate moisture at field capacity: when squeezed, only a few drops of water should express. During colonization, do not water; keep the vessel closed so moisture remains internal. For fruiting, maintain 85–95% relative humidity by fine-misting the air and surfaces 1–3 times daily, avoiding direct soaking of caps. Ensure good airflow to prevent condensation on gills. If using a casing, mist lightly to keep it evenly damp, never saturated.
Light
Low to moderate diffuse light is sufficient for orientation and normal cap development. Provide an indirect 12-hour light cycle (e.g., ambient daylight or cool-white LED at 100–300 lux). Avoid strong, direct sun, which dries caps and substrate. Darkness is acceptable during colonization, but some light during fruiting improves form and pigmentation cues. Keep light sources cool to prevent localized heating and dehydration.
Nutrients
Think in terms of substrate nutrition rather than plant fertilizer. Use pasteurized wheat or barley straw or a well-matured compost enriched modestly with nitrogen (e.g., 5–10% wheat bran by dry weight). Maintain a balanced C:N near 25–30:1. Incorporate 1–2% gypsum for calcium and pH buffering and to improve structure. Avoid synthetic salt-based fertilizers, which can inhibit mycelium. Keep pH near neutral and do not over-supplement, which can cause bacterial blooms and stalled colonization.
Temperature
For colonization, aim for 20–26°C with stable, draft-free conditions. For fruiting, provide cooler, temperate conditions around 12–20°C; brief dips a few degrees lower are tolerated, but avoid frost. Sustained temperatures above 28°C risk bacterial contamination and weak fruiting. Gentle diurnal variation can help trigger pinning. Avoid placing cultures in direct sun or near heat sources that cause rapid drying or temperature spikes.
