Substr8™ Inject & Forget Mushroom Growing Kit 1.5KG - Beginner Friendly | Zero Maintenance Growing UK

Zero Maintenance Growing. Maximum Results.

Our bestselling Substr8™ kit eliminates all the guesswork from mushroom cultivation. Simply inject your spores and harvest fresh mushrooms in 4-6 weeks - no monitoring, no maintenance, no stress. Perfect for beginners or busy cultivators who want professional results without the complexity.

What's Included

• 1.5KG premium 8-ingredient substrate blend
• Sterile nitrile gloves
• Surgical face mask
• 70% isopropyl alcohol wipe
• Antimicrobial hand wipe
• Complete injection instructions

Three Simple Steps

1. Inject - Add 10ml of your chosen spore syringe through the injection port
2. Wait - Place in a warm location (20-25°C) and forget about it
3. Harvest - Fresh mushrooms ready in 4-6 weeks

Professional 8-Ingredient Formula

Our exclusive Substr8™ blend combines premium rye grain, coco coir, straw, bat guano, worm castings, coffee grounds, vermiculite, and gypsum. Each component is precisely measured and sterilised to deliver faster colonisation, larger yields, and multiple flushes.

Expected Results

• First flush: 200-400g fresh mushrooms
• Total yield: 500-800g across multiple harvests
• Timeline: 4-6 weeks to first harvest
• Maintenance: Literally zero - set and forget

Customer Success Story

"This stuff is unlike anything I have ever seen. The mycelium goes nuts and it seems have built in contam resistance. I cannot rate this highly enough. Seemed expensive but wow you get what you pay for!"

- Stuart P, UK

Why Substr8™ vs. Traditional Kits?

Unlike basic grain-only kits that require separate substrate purchases, Substr8™ includes everything in one optimised package. Our 8-ingredient formula outperforms standard coco coir mixes, delivering 40% higher yields with built-in contamination resistance.

Detailed Ingredients

Every component has been thoughtfully chosen and expertly measured to deliver the fastest, largest, and best flushes humanly achievable.

• Rye Grain - About 600g, hydrated to the perfect level
• Coco Coir - The primary element of a top-tier substrate
• Straw - Source of carbohydrates for your mycelium to thrive on
• Bat Guano - Broad source of nutrients your mushrooms will thank you for
• Worm Castings - Broad source of minerals including phosphorus, magnesium, potassium, and calcium
• Coffee - An essential nitrogen source for robust and vigorous growth
• Vermiculite - Optimises moisture retention to support multiple flushes
• Gypsum - Adds vital nutrients for your mycelium and keeps pH in check, minimising contamination risk
• Water - Purified through an advanced 5-stage filtration system

Perfect for Beginners

This kit is ideal for anyone interested in cultivating their own mushrooms, whether for therapeutic benefits, medicinal use, or gourmet cooking. It's especially suited for beginners or those with busy schedules who want a low-maintenance way to grow mushrooms with professional results.