Elm Oyster Mushroom Spores

Why Elm Oyster?

Elm Oyster mushrooms are a hardy and fast-growing gourmet variety, often admired for their wide, funnel-shaped caps and graceful stems. Though called “Elm Oyster,” they’re not a true oyster mushroom, but rather a close cousin with their own unique charm.

They’re valued for their mild, nutty flavor and firm texture, making them excellent in sautés, stir-fries, soups, and pasta dishes. Unlike some more delicate varieties, Elm Oysters hold their shape well during cooking, adding both taste and substance to your meals.

Growing them yourself lets you experience the beauty of their cascading fruiting clusters while harvesting a steady supply of fresh, gourmet mushrooms.

What’s Included:

A fully colonized Elm Oyster mushroom Spore, ready to fruit

Timeline and Growth Cycle of Elm Oyster Mushrooms

1. Spore germination – begins at week 0.
2. Mycelium colonization – develops quickly, usually fully colonized within 2–4 weeks.
3. Primordia (pinning stage) – tiny pin-like knots form in clusters around weeks 3–4 once the block is exposed to fresh air and light.
4. Young fruiting bodies – caps begin to expand, forming small ivory umbrellas by weeks 4–5.
5. Mature fruiting bodies – clusters of broad, cream-colored caps are ready to harvest around weeks 5–6.
6. Harvest – pick Elm Oysters while caps are still slightly curled at the edges for best flavor and texture. Multiple flushes are possible with proper care.