Mushrooms are not vegetables botanically—they're fungi with their own kingdom—but they function as vegetables in the kitchen and on the plate. At Adi’s Urban Mushrooms in West Norwood, we grow them alongside our understanding that this distinction matters for sourcing, storage, nutrition and flavour. Understanding what mushrooms actually are helps you cook, store and grow them better.
Why aren't mushrooms technically vegetables?
The simple answer: mushrooms lack chlorophyll and roots. They’re fungi—a kingdom entirely separate from plants. Where vegetables come from seeds, grow from soil with roots, and use sunlight to photosynthesize, mushrooms fruit from mycelium (threadlike networks) and digest organic matter to grow. When I work with growers and foragers in South London, this distinction shapes everything: how we cultivate them, what substrates we use, and how we source them responsibly.
Botanically, a mushroom is the fruiting body of a fungus—the visible part you eat is essentially a temporary structure for releasing spores. It contains no chlorophyll, no vascular system like plants do. This is why mushrooms have their own kingdom, Fungi, separate from Plantae. In culinary and nutritional contexts, though, we treat them as vegetables because they sit alongside them on the plate, in the market stall, and in the cooking method.
What makes mushrooms function as vegetables in cooking?
In the kitchen and on the menu, mushrooms behave like vegetables. They’re savory, umami-rich, absorb flavour from other ingredients, and work in vegetable-based dishes. Many restaurants in South London that source from me treat mushrooms exactly as they would treat root vegetables or leafy greens—as a protein-like base or a supporting player in a dish. They don’t require the preparation logic of animal protein. You sauté, roast, braise, and dry them as you would vegetables.
The culinary reality is practical: if you’re planning a vegetarian plate, mushrooms anchor it. They’re meaty, substantial, and develop umami depth with cooking. At West Norwood Feast, where I trade my fresh gourmet varieties, they sell alongside seasonal vegetables because customers shop for them in the same mental category. From a kitchen perspective, the botanical truth takes a backseat to flavour, texture, and how they work in recipes.
How does the botanical difference affect how you store and handle mushrooms?
Because mushrooms are fungi, not plants, they have different storage needs. They don’t wilt like leafy greens or harden like root vegetables. Instead, they absorb moisture and can become slimy if stored incorrectly. Fresh mushrooms should be kept in a paper bag in the refrigerator, not sealed plastic, because they’re living systems that respire. They continue to breathe and release moisture even after harvest. This is something I emphasize in our cultivation workshops and with restaurants I supply to—the storage logic is fundamentally different from vegetables.
Understanding this also matters for drying and preservation. Dried mushrooms are more stable than dried vegetables because they don’t have the same cellular breakdown patterns. At Adi’s Urban Mushrooms, we produce dried mushroom powders and jerky, and the fungal biology means they concentrate flavour and keep longer without refrigeration than a dried vegetable would. For home growers using our kits, knowing this prevents the most common mistake: treating fresh mushrooms like vegetables and losing them to moisture damage within days.
Why does this matter when you're sourcing or growing mushrooms?
If you’re buying mushrooms from a local grower or market—or growing your own—this distinction shapes quality and freshness. A vegetable farmer grows from seed and soil; a mushroom grower cultivates mycelium on substrate. The sourcing chain is different. When I grow small-batch gourmet varieties for local restaurants and markets in South London, I’m working with controlled indoor conditions, not seasonal outdoor crops. This means gourmet mushrooms can be available year-round, and the grower can be transparent about exactly what substrate and methods have been used.
It also affects price and supply expectations. Vegetables scale with land and season; mushrooms scale with controlled environment systems. This is why you might find the same gourmet varieties available consistently at a farmers’ market from a dedicated grower, whereas vegetable availability shifts seasonally. At West Norwood Feast and through the South London Mushroom Club, local growers can offer consistency and traceability that conventional supply chains often can’t. Understanding the botanical difference helps you ask better questions: Where was the substrate sourced? How was the mycelium started? How fresh is this really?
What about nutrition—does the botanical classification change what mushrooms offer?
Nutritionally, mushrooms are unique. They contain ergothioneine (a rare antioxidant), B vitamins, selenium, and potassium in significant amounts. Unlike vegetables, mushrooms are one of the few foods that naturally contain vitamin D when exposed to sunlight or UV light during growth. This doesn’t make them a ‘superfood’—that’s marketing noise—but it does make them nutritionally distinct from both vegetables and animal proteins. Their fungal nature means they’re a genuinely different food category from a nutritional perspective too.
The point is: mushrooms offer something genuinely different from vegetables because they’re a different kingdom of life. They’re not trying to be vegetables; they’re fungi that happen to work beautifully alongside vegetables on a plate. When I talk to participants in our foraging walks and cultivation workshops in South London, I emphasize that this isn’t semantic pedantry—it’s about respecting what mushrooms are, which is the foundation for cooking, storing and growing them well.
How can you learn more about mushrooms if you want to grow or cook them properly?
Understanding mushroom biology isn’t abstract—it directly improves your results in the kitchen and in the garden. If you’re curious about growing your own, our mushroom grow kits come with clear guidance on the conditions fungi actually need, which are radically different from what vegetables need. If you’re sourcing for cooking, knowing that mushrooms are fungi helps you ask growers the right questions about substrate, growing methods, and freshness markers.
We run cultivation workshops and foraging walks through Adi’s Urban Mushrooms, and we’re also part of the Community Mycology Lab at Remakery Brixton and the South London Mushroom Club. These spaces exist precisely because mushroom knowledge is practical, learnable, and transforms how you engage with them. Whether you’re planning to cook with them, grow them at home, or just understand what you’re buying at the market, grounding yourself in what mushrooms actually are—fungi, not vegetables—is the best starting point. Get in touch to find out about upcoming workshops or events, or explore our cultivation kits and education offerings.