Sterilised Mushroom Substrate Bag 1300g with Injection Port

Starting a new cultivation project should be simple, not a juggling act of containers and sterilisation steps. The Sterilised Mushroom Substrate Bag 1300g with Injection Port brings a sterilised grain base and a nutrient-rich bulk substrate together in one sealed bag. No transfers, no extra preparation — just inoculate through the port and let the mycelium work.

An all-in-one sterilised substrate grow bag

Produced in controlled batches for consistent cleanliness and stable availability, this ready-to-inoculate grow bag holds 1300g of prehydrated substrate at 60–65% moisture. The blend pairs a sterilised grain base, such as rye or sorghum, with a bulk mix of coco coir, vermiculite and gypsum to support steady colonisation. A self-healing injection port and a 0.2 µm microfilter handle inoculation and gas exchange within a single sealed unit.

Why growers choose this grow bag

• Less hands-on work: the grain and bulk substrate arrive combined, so there is no need to mix or move material between containers.
• Lower contamination risk: the sealed bag, microfilter and self-healing port keep the substrate protected during inoculation.
• Consistent composition: controlled batch production keeps moisture and blend stable from one bag to the next.
• Approachable setup: a practical option for beginners and seasoned hobby cultivators who prefer minimal equipment.
• Reliable availability: continuous production supports fast order fulfilment.

Inoculation takes place directly through the injection port using your own spore syringe or liquid culture. The bag is supplied as a cultivation supply, without spores. You can pair it with items from our Mushroom Cultivation Supplies range, or browse other Mushroom Grow Bags to match your project. Popular ready-made options include the Golden Teacher Magic Mushroom Grow Bag (1300g) and the B+ Magic Mushroom Grow Bag (1300g).

What’s included

• 1300g sterilised mushroom substrate (grain base + nutrient-rich bulk blend)
• Self-healing injection port for direct inoculation
• 0.2 µm microfilter for gas exchange

Frequently asked questions

What is included with the Sterilised Mushroom Substrate Bag 1300g?

Each bag contains 1300g of prehydrated, sterilised substrate combining a grain base with a nutrient-rich bulk blend, plus a self-healing injection port and a 0.2 µm microfilter. Spores are not included.

Do I need extra equipment to use this grow bag?

The bag is built as an all-in-one unit, so no transfers or additional containers are required. You only provide your own inoculant for the injection port.

Is this substrate bag suitable for beginners?

Yes. The combined substrate and sealed design make it a straightforward option for first-time hobby cultivators, while experienced growers appreciate the consistent batch production.

Order your sterilised substrate bag today

Ready to get started? Add the Sterilised Mushroom Substrate Bag 1300g with Injection Port to your cart for discreet packaging and fast dispatch from the Netherlands. Browse our full range of grow supplies and accessories for everything else your project needs.