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Description
Bulk Shiitake Mushroom Fruiting Block – 25–1000 Unit Packs
Need reliable Shiitake mushroom yields at volume without babysitting colonisation? Our 3kg, ready-to-fruit Shiitake (Lentinula edodes) fruiting blocks are made in the UK and supplied in bulk packs from 25 to 1000 units - ideal for commercial rooms, scaling growers, and retailers who want consistent stock.
Every block is built on a nutrient-dense substrate and produced with lab-grade process control, backed by our Lifetime Guarantee for total risk reversal.
Choose from 25, 50, 100, 250, 500 or 1000 unit packs for commercial consistency and better unit economics.
Need trade support, custom scheduling, or a tailored quote? Contact us and we’ll build a supply plan around your volume.
Wholesale‑Ready Shiitake Fruiting Blocks
This is a pre-colonised 3kg Shiitake fruiting block designed to go straight into fruiting conditions - no inoculation step required. It’s capable of producing 1kg+ fresh Shiitake mushrooms across multiple flushes when conditions are dialled in.
Ideal for
- Commercial farms and scaling growers who rely on consistent cycle times and repeatable results
- High-volume hobby growers who want access to wholesale pricing without complicated sourcing
- Retailers and resellers looking for a reliable, high-performing Shiitake fruiting blocks
Not a Bulk Buyer?
This page is for trade, wholesale, and high‑volume growers ordering 25–1000+ units.
If you’re a hobby grower or want to trial smaller quantities first, use our standard (non‑bulk) listing here.
Key Advantages
- Direct from the source - You get the best price. It's all about direct supply from a top UK mushroom supplier.
- Scale whenever you’re ready - Need 25 now or 1,000+ regularly? We’ve got you covered year-round.
- Rapid fruiting start - Fully colonised and ready to go, so you can move straight to fruiting and see Shiitake mushrooms develop sooner with no waiting around.
- Clean, commercial-grade sterility - Each batch is sterilised for 2.5 hours at 121°C in a computer-controlled autoclave at our Kent facility, giving you a contamination-free grows.
- Perfectly balanced moisture - Grain and hardwood blend substrate is hydrated just right to encourage healthy, vigorous growth without inviting bacteria.
- High-quality filtration - 0.2-micron filter patches let the bags breathe while helping keep contaminants out - so you get more consistent results.
What You Get
- Bulk packs 25–1000 to match your production runs
- 3kg Ready-to-Fruit Shiitake Block - standardised for consistent runs and simple SOPs.
- Supplemented hardwood blend, hydrated for consistent fruiting
- Cleanroom-prepped and ready to fruit on arrival
- Sterilised in a computer-controlled autoclave (2.5 hrs @ 121°C)
- Lifetime Guarantee (we stand behind every bag)
- Free UK delivery on £50+ orders helps protect margins
- Pay in 3 interest-free instalments available at checkout
Built For
Product Sellers (retailers, resellers, garden centres)
- Building ready-to-fruit Shiitake blocks with consistent, repeatable quality.
- Offering case quantities for serious growers
- Improving customer outcomes with fully colonised, ready-to-fruit Shiitake blocks and guarantee
Growers (commercial & high-volume)
- Routine fruiting runs with consistent, clean performance
- Fruiting workflows (tent, tubs, or fruiting bags) from cut-to-harvest
- Faster SOPs: no soaking/cooking/sterilising on your end
Perfect For
- Fruiting Shiitake mushrooms with minimal prep
- Consistent first flushes when you need a reliable, ready-to-go block (no grain-to-bulk step required)
- Staggered harvest cycles - ideal for repeatable scheduling when running multiple blocks (timelines vary by conditions and strain/culture)
What’s Included
- 3kg fully colonised Shiitake fruiting block
- Lifetime Guarantee coverage
Not included: spore or liquid culture syringe.
How It Works
- Mature the Block: Let the block turn brown before fruiting. If your Shiitake block is still mostly white, give it time to “brown” and form a firm outer skin. This browning phase helps set the block up for stronger, more reliable flushes.
- Prepare the Block: Remove the entire block from the bag and soak it in cold water for 4-8 hours to rehydrate. Place something heavy on the block to keep it submerged.
- Maintain Humidity: Maintain a humid environment by misting the block two or three times daily or using a humidity tent. After soaking, pinning can occur within 7-14 days, but this depends on the environmental factors. Once pins form, reduce misting to avoid soggy caps and focus on fresh air exchange for healthy mushroom growth.
- Humidity-Controlled Chamber: Alternatively, you can place the fruiting block in a chamber such as a MonoTub or Martha tent for optimal growth, as this will help maintain ideal fruiting conditions.
- Harvest: After around 30 days, the mushrooms should reach full size. Gently twist at the base to harvest.
Quality Guarantee
At Martian Mushrooms, we don't just sell supplies; we use them.
Every batch is produced with lab-first discipline: grain + hardwood blend substrate is soaked/cooked, hydrated to field capacity, and sterilised in a computer-controlled steam autoclave for 2.5 hours at 121°C.
If something goes wrong, you’re protected by our Lifetime Guarantee - built for growers who can’t afford downtime.
Technical Specifications
| Specifications | Details |
|---|---|
| Product | Bulk Shiitake Mushroom Fruiting Block |
| Blend | Millet, milo, hardwood pellets, soy hulls and gypsum |
| Bag weight options | 3kg |
| Bulk pack sizes | 25 / 50 / 100 / 250 / 500 / 1000 |
| Hydration | Field capacity |
| Sterilisation | 2.5 hrs @ 121°C (computer-controlled autoclave) |
| Fruiting guide | Make a small X/slit in the bag and place in high humidity + fresh air (indirect light) |
| Typical first harvest window | 30 days (conditions/strain dependent) |
| Storage | Use soon after arrival. Store at room temperature for up to 3-6 months. Refrigerate for up to 12 months |
| Shipping note | Free UK delivery on £50+ orders |
Martian Mushrooms vs. Competitors
| Specifications | Details |
|---|---|
| Substrate Material | 100% Premium Millet and Millet Grain, Hardwood Pellets, Soy Hulls and Gypsum |
| Sterilisation Method | Industrial Autoclave (121°C @ 15psi+) |
| Filter Type | 0.2 Micron Gas Exchange Filter |
| Injection Port | Self-healing rubber injection port |
| Bag Type | Polypropylene (Autoclavable, High-Temp) |
| Shelf Life | 3-12 Months (Store in a cool, dark place) |
| Manufacturing Location | United Kingdom |
Don’t let prep work slow you down. Secure your supply with reliably consistent, ready-to-fruit Shiitake blocks.
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