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Grow Mushroomsat Home in Just10 Days!

Grow Mushroomsat Home in Just10 Days!

Our Mushroom Grow Kits make growing fresh gourmet mushrooms at home simple. Choose any three varieties to build your bundle and only pay for two. Each kit arrives pre-colonised and ready to fruit - simply cut, spray and watch your mushrooms grow!

🍄 Pre-colonised and ready to fruit

🎁 Choose any two kits and get one FREE

💧 Simply cut, spray and grow

✨ Perfect for beginners with minimal effort

📅 Harvest fresh mushrooms in as early as 10 days

🛡️ Guaranteed to produce mushrooms or we’ll replace your kit free of charge 

Want to learn how to grow mushrooms with this kit? See our online guide here

BUY 2 GET 1 FREE - MUSHROOM GROW KITS UK
Mix & Match Any Species

BUILD YOUR BUNDLE

Choose your mushroom grow kits

Tap a variety to add it.

£21.95 PER KIT

Add 3 kits to unlock your free kit

0 selected

Choose your varieties

Buy 2 Get 1 Free applies automatically at checkout.

Description

Grow fresh gourmet mushrooms at home with our beginner-friendly Mushroom Grow Kits.

Choose any three varieties to create your own bundle - you’ll only pay for two. Each kit arrives ready to fruit, so there’s no complicated equipment or previous growing experience needed. Simply follow the instructions, keep it misted and watch your mushrooms grow.

Benefits

  • Beginner-friendly; no prior experience or knowledge required.
  • Harvest up to 700g+ of fresh gourmet mushrooms from a single block. 
  • Ready-to-fruit block makes the process quick and easy.
  • Guaranteed to produce mushrooms or we’ll replace your kit free of charge.
  • Save money by growing your own mushrooms at home 

How Does It Work

  1. Choose three mushroom kits.
  2. Add your bundle to the basket.
  3. One kit is automatically FREE.
  4. Follow the instructions.
  5. Mist regularly and watch your mushrooms grow.

Growing Conditions

Temperature: 

  • Colonisation: Mycelium (the vegetative part of the fungus) colonises the substrate best at around 24-27°C (75-80°F).
  • Fruiting: For the fruiting stage when mushrooms begin to develop, slightly cooler temperatures (about 21-24°C, or 70-75°F) are recommended. 

Humidity: High humidity (over 90-95%) is essential for healthy, large fruits. Use misting, humidifiers, or a fruiting chamber to maintain humidity.    

Light:  

  • Colonisation: Complete darkness is preferred for rapid colonisation.    
  • Fruiting: Indirect sunlight or ambient light is sufficient. 

Fresh Air Exchange (FAE): Proper ventilation is necessary to provide the growing mushrooms with fresh air and prevent the buildup of carbon dioxide, which can inhibit growth.    

Sterility: Maintaining a clean and sterile environment is paramount to prevent contamination from other fungi or bacteria, which can compete with the mycelium and hinder its growth. 

Ingredients

Good ingredients make for excellent grow kits. That is why we only use 100% natural and organic grain and masters mix substrate in our kits. We only use high-quality, natural ingredients for our products, specifically selected to support the optimal growth of gourmet mushrooms. 

Our proprietary substrate blend is a mix of optimally hydrated millet grains, milo grains, hardwood pellets, soy hulls and gypsum. This mixture is carefully hydrated to field capacity and sterilised in a computer-controlled steam autoclave for 2.5 hours at 121°C.  

The result is an optimal 6:1 substrate to spawn ratio. This is then inoculated with our own gourmet liquid culture, the substrate providing the perfect nutrient rich environment for mycelium, promoting rapid colonisation, large yields and minimal risk of contamination.  

What's Included

  • Three Mushroom Kits in your chosen varieties
  • One kit completely FREE
  • Our Lifetime Guarantee

You can select three different varieties or choose multiples of the same one.

WE DO NOT INCLUDE 

Spore or liquid culture syringe: Liquid cultures for gourmet varieties are available here.  

Physical copy of the growing guide: You can find our online step-by-step mushroom growing guide here, as well as some of our own tips and tricks for optimising your grow. We highly recommend reading it before purchasing! 

Storage

Please aim to use your Mushroom Grow Kit after receiving it. If you are not using right away, store the substrate bag in the fridge. Stored this way, your kit should last at least 12 months.

View full details

Fresh mushrooms. Grown on your kitchen counter.

Your kit arrives pre-colonised and ready to fruit.

Cut

Mist

Harvest

No spores. No inoculation. No specialist setup.

EXPLORE THE LINE-UP

FIND YOUR NEXT FAVOURITE.

Choose a variety to see what makes it special.

From easy-going beginner varieties to distinctive gourmet mushrooms, explore the flavours, shapes and growing styles you can bring to life at home.

What you get. What to expect.

What is included in the mushroom grow kit

What to expect

Up to

700g

fresh mushrooms from one kit

As early as

10 days

to harvest in suitable conditions

Care

2–3×

light misting each day

Backed by

Lifetime

Martian guarantee

Real grows · real reviews

Join thousands growing mushrooms at home.

See the results, read the experiences and feel confident starting your first grow.

4.9/5600+ Total verified reviews

What growers say

★★★★★

“It was my first time trying a Lion's Mane mushroom and it was delicious. I'll be reordering soon.”

Aaren Saddul - Verified customer

DS - Verified customer
★★★★★

“Despite being rather neglected during a house move our blue oyster kit has produced an amazing crop of mushrooms (with more on the way!).”

DS - Verified customer

★★★★★

“Martian Mushrooms’ Golden Oyster kept on producing strong, colourful, and beautifully clustered right through January, in the middle of a UK winter.”

Richard Stones - Verified customer

AS - Verified customer
★★★★★

“The online instructions were extremely simple and in literally just over a few weeks I harvested my first Lions mane mushroom!”

AS - Verified customer

NEED TO KNOW

YOUR QUESTIONS, ANSWERED.

Everything you need to know before choosing your kit and getting started.

How does the Mushroom Grow Kit work?

Cut along the marked lines in the box and cut an opening in the bag. Mist as directed and place the kit somewhere suitable for fruiting. The kit does the growing work while you provide the right conditions and a little regular care.

Is it suitable for beginners?

Yes. The kit is designed to make growing gourmet mushrooms approachable, even if you have never grown mushrooms before. Follow the simple care instructions and keep an eye on moisture and airflow.

How long does it take to grow mushrooms?

Growing time depends on the variety and the conditions in your home. Once the kit is opened and cared for correctly, you can expect visible growth in as early as 10 days.

Where should I keep my kit?

Choose a clean spot indoors with indirect light, fresh air and a comfortable room temperature. Avoid direct sun, radiators and places where the kit can be knocked over.

How often should I mist it?

Mist according to the care instructions included with your kit. The surface should stay suitably moist, but it should not be left waterlogged. Your environment may affect how often misting is needed.

Which mushroom varieties can I choose from?

You can choose from the varieties shown in the selector above. Click a mushroom to learn more about its appearance, flavour and growing characteristics before building your bundle.

Can I get more than one harvest?

Many kits can produce more than one flush when they are cared for correctly. Results vary by variety and growing conditions, so follow the instructions provided with your kit.

What happens if I have a problem with my kit?

Contact us with your order details and a clear photo of the kit. We will help you work out what is happening and advise on the next step.