How to Grow Wine Cap Mushrooms

Wine Caps –also known as Garden Giant or King Stropharia– are easy to grow. Spring is an ideal time to start your outdoor mushroom bed. 

Select a location under a fruit tree, between vegetable rows, or anywhere with shelter from the direct hot sun. Lay down cardboard, moistened straw and/or hardwood chips about 10cm (4″) deep. Our Wine Cap sawdust kit will inoculate an area approximately 1m x 1m (3ftx3ft). 

Crumble up the wine cap spawn and mix throughout.   Keep well watered, particularly in the dry summer months.

After a few weeks white stringy strands of mushroom mycelium will be visible spreading in your mushroom garden bed. Eventually the fungal mycelium with cover the entire bed and giant burgandy mushrooms will sprout throughout the spring, summer and fall (depending on when the mushroom bed was planted).

The mushroom bed will over winter, and as you keep feeding them more straw or wood chips, will provide mushrooms year after year.  Expand your patch by transplanting handfuls of mycelium to new beds.

Wine Caps can also be grown indoors in containers throughout the year.

King Stropharia Identification Features (Stropharia rugoso-annulata)

• Cap wine red to red brown when young (but often fading to tan as it ages)
• Surface of cap sticky or slimy when moist; bald, medium to very large
• Gills attached to stalk, at first grey or purple grey, becoming black in old age
• Stalk at least 1/2inch thick, white when fresh
• Veil present, at first covering gills, then forming prominent ring on stalk
• Ring on stalk grooved or ridged on upper surface
• Spores deeply coloured dark purple brown or black
• Flesh white, not discolouring appreciably when bruised
• White threads often emanating from base of stalk, no volva