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White Button Mushroom Spawn for Growing

White Button Mushroom Spawn for Growing

$16.99 USD
$16.99 USD
Sale Sold out

How to Sow and Plant

Prepare a nutrient-rich substrate / compost (e.g. decomposed straw, manure, manure + straw mix) or use a pre-prepared mushroom grow kit.
Spread the spawn evenly over the surface of the substrate. Do not bury deeply — a thin, even layer is enough.
Maintain cool temperature (~12–18 °C or 55–65 °F) and high humidity (85–95%); cover trays or beds to help retain moisture; ensure good ventilation to avoid contamination.
Once mycelium has colonized the substrate (typically 10–15 days), apply a casing layer (peat / moist soil / vermiculite-based) about 3–4 cm thick to aid fruiting.
Maintain moisture by misting or gentle watering (avoid waterlogging), keep environment dark or in low-light, and wait — mushrooms should begin to appear in ~2–4 weeks.

How to Grow

Keep substrate moist and humid, with periodic misting; avoid drying out.
Maintain cool, stable temperature — avoid heat spikes; ideal around 15–24 °C (some spawn prefer 13–18 °C).
Provide good ventilation but avoid direct sunshine; grow in dark or shaded area.
Use clean, sterilized substrate / tools to prevent contamination with molds or bacteria.

Tips

Grow indoors (tray/box/substrate bag) if outdoor climate is too warm — mushrooms prefer cool, stable temperatures.
Maintain high humidity and cleanliness — this is critical for fungal health and to avoid contamination.
Harvest mushrooms when caps are compact and white (button stage) — before gills open for best shelf-life and texture.
After first flush, you can often get multiple flushes with proper care (moisture, casing, environment).

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About
Product Information
Features
life-cycle

Life Cycle

Fruiting fungus

plant-characteristics

Plant Characteristics

Produces compact

growth-habit

Growth Habit

Fungal

bloom-season

Bloom Season

cool weather

flavour-profile

Flavour Profile

Mild

suitable-for

Suitable for

indoor

About
White Button Mushroom Spawn for Growing
seed-type

Seed Type

Mushroom spawn

plant-type

Plant Type

Edible fungus

White Button Mushroom (Agaricus bisporus) is among the most commonly consumed mushrooms worldwide — prized for its mild flavour, soft texture, and versatility in cooking. Unlike traditional vegetables, they grow from fungal spawn rather than seeds and require a substrate — compost or manure-based growing medium, not garden soil. They prefer cool, humid, dark (or low-light) conditions rather than sunlight, making them ideal for indoor cultivation or specially prepared mushroom beds. With the right conditions (humidity 80–90%, cool temperature, good ventilation, sterilized substrate) they fruit in just a few weeks. For home gardeners, this makes them a sustainable, space-efficient way to produce fresh mushrooms year-round.

Planting information
planting-season

Planting Season

Cool

fruit-size

Fruit Size

Medium

plant-height

Plant Height

3–5 cm

light-requirement

Light Requirement

Low-light

water-needs

Water Needs

High humidity

hardiness-zones

Hardiness Zones

climate

container-garden

Container Garden

Yes

plant-spacing

Plant Spacing

15–18 cm

planting-depth

Planting Depth

15–18 cm

growing-conditions

Growing Conditions

Cool temperature

Coverage
Seed Count
Recommended Coverage
Seed Count
100
GTN
036000168129

Frequently Asked Questions

Is mushroom spawn the same thing as mushroom seeds?

No. Spawn contains fungal mycelium used to colonize a growing substrate. Mushrooms reproduce through spores rather than conventional plant seeds.

Why is a casing layer used for white button mushrooms?

After the substrate is colonized, the page recommends a moist casing layer about 3–4 cm thick to support fruiting.

Why is cleanliness important when growing mushroom spawn?

Clean tools and substrate help reduce contamination from unwanted molds or bacteria, which can compete with the mushroom mycelium.

Can white button mushroom spawn be grown in a warm outdoor climate?

Indoor cultivation can be more practical when outdoor temperatures are too warm because the growing environment can be kept cooler and more stable.

What does a healthy mushroom fruiting environment need besides humidity?

The page emphasizes stable cool temperatures, moisture, cleanliness, ventilation and protection from direct sunlight.

When should white button mushrooms be harvested at the button stage?

Harvest when the caps are compact and white, before the gills open, as recommended on the product page.