Description
Two sizes are available: 700g and 3kg.
Our pre-sterilised, ready-to-use Master Mix Mushroom Substrate is ideal for mushroom cultivation. Designed specifically for Wood-loving mushrooms, this substrate is hydrated to field capacity, ensuring optimal moisture content for mushroom growth. It is ideal for all woodloving mushroom species that like wood.
This substrate is a balanced blend of 50% hardwood sawdust and 50% Lupin pellets. Lupin pellets are rich in fermentable fibre and nitrogen, essential for boosting mushroom growth. However, as the mixture contains only half wood, the later stages of mushroom growth might not be as prolific as the initial burst. This mix is excellent for various mushrooms but is not the best choice for species like Shiitake and Turkey Tail, which thrive in environments with more wood. The Master’s Mix is famous in mushroom farms and starter kits because it helps achieve a quick and impressive first harvest. It is incredibly motivating for beginners in mushroom cultivation and offers a faster turnaround for mushroom farmers.
The Master’s Mix Mushroom Substrate also comes with Woodchips. When mycelium comes in contact with woodchips while growing, they become really Vigorous—resulting in thicker and faster colonisation. For more information about Mycelium, check out Our Grain Spawn.
If you are working with our Grain spawn and do not want to use up all the spawn in one go, inoculated a grain bag with agar or inoculated a substrate bag with grain spawn for which you had to cut open the bag but have no way to seal the bag again consider to have our Large Sealing Bag Clips.
Source and Quality of Sawdust and Lupin Pellets
We source our Sawdust directly from Tasmania or NSW and are made of 100% Tasmanian Oak, and pellets are made from Australian hardwood. Our Lupin pellets are non-GMO and Australian-grown Rootlab branded.
Our lupin based substrate is what we grow Rootlab’s mushroom on. We get 5-10% better yield than a soy based Masters mix.
Before you order: Make sure your grain spawn is fully colonised and clean before your substrate arrives. This is the single best way to avoid a wasted bag. If your spawn turns out to be contaminated and you only find out after the bag has landed, you are left with a clean bag and nothing safe to put in it, and the 14 day window will not wait.
When the bag arrives: Rootlab ships the bag taped inside a box. Remove the tape carefully, unfold the bag and stand it upright. Check it straight away. You are looking for green or otherwise coloured patches, wet spots, or an off smell. If anything looks or smells wrong, contact us before going any further.
Hold the bag for at least 5 days and check it again. Contamination is not always visible on arrival, and this holding period gives anything latent a chance to show itself. It also protects you, because once a bag is inoculated it can be hard to tell whether a problem originated with us, with your spawn, or with your technique and environment.
Use the bag within 14 days of arrival. Past that, the bag starts to dry out and the contamination risk rises. If the bag passes its day 5 check, inoculate any time between day 5 and day 13.
Always open the bag carefully, inside a still air box or in front of a flow hood, as improper opening increases the risk of contamination.
Once You have inoculated the bag with grain spawn, colonisation should take place somewhere with good airflow, but out of direct sunlight and away from any direct heat or cold source.
Check our Store to find other Mushroom Substrates.
