1. Mushroom CUT & Grow Kit Instructions
1. Open & Cut
You start with a fully colonised grow block sealed inside its bag. Make sure the block is 100% white with mycelium before you cut it — this can take 1–2 weeks depending on temperature and species. Once it’s fully colonised, make a 5–7 cm “X” cut (or remove the pre‑cut window) on the marked side. Peel the flaps back slightly so the mycelium can breathe.
2. Hydrate
Mist the exposed cut area lightly.
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3. Set Fruiting Conditions
Mushrooms fruit when they sense:
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Fresh air
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High humidity (80–95%)
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Indirect light
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Cool–moderate temps (15–21°C)
Keep the tent humid by misting 1–2× daily and opening it briefly for airflow.
4. Pinning
Within 3–7 days, tiny bumps (“pins”) appear around the cut. These are baby mushrooms beginning to form.
5. Rapid Growth
Pins double in size daily. Keep humidity high to avoid cracked caps or dry edges.
6. Harvest
Harvest when:
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Oyster caps flatten or curl slightly
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Lion’s mane forms long spines (1–2 cm)
Twist the cluster off or cut at the base.
7. Second Flush
After harvest:
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Rest the block 2–3 days
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Rehydrate (soak 4–6 hours if the species prefers)
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Make a new cut on a fresh side
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Repeat misting + airflow
Most blocks give 2–3 flushes.
2. INJECT AND FORGET METHOD
The GRO Mushroom Bag makes growing mushrooms simple. First, clean the injection port with an alcohol swab to keep everything sterile. Then inject 5 ml of spores or liquid culture into the bag’s substrate. Leave it somewhere warm for three to four weeks while the mycelium spreads through the mix. Once it’s fully colonised, cut a X in the front of the bag or cur the top of the bag, to give the mushrooms space and fresh air to start fruiting. Keep the humidity steady, and you’ll have fresh mushrooms ready to harvest in one clean, easy cycle.
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3. GRAIN‑TO‑BULK MUSHROOM CULTIVATION
Grain‑to‑bulk cultivation is the standard method used by growers to turn a small amount of mycelium into a large, productive mushroom substrate. It works by first allowing mycelium to colonise a nutritious grain, then mixing that grain into a larger bulk material so the mycelium can expand and fruit.
1. Grain Spawn Stage
The process begins with grain, which acts as a nutrient‑rich carrier for mycelium. Once inoculated, the grain becomes grain spawn — fully colonised, white, and ready to spread into a larger substrate.
2. Bulk Substrate Stage
The colonised grain is then combined with a bulk substrate such as coco coir, straw, or hardwood‑based mixes. This bulk material provides the mass and moisture needed for mushrooms to grow in quantity.
3. Colonisation of the Bulk
After mixing, the mycelium spreads from the grain into the bulk substrate. When the entire mixture turns evenly white, the block or tub is considered fully colonised and ready for fruiting.
4. Fruiting Conditions
To trigger mushrooms, the colonised substrate is given:
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Fresh air exchange
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High humidity
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Indirect light
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Stable temperatures
These environmental cues tell the mycelium it has reached the surface and can begin forming mushrooms.
5. Harvest & Further Flushes
Once mature, mushrooms are harvested in clusters. The substrate can often produce multiple flushes, with rest and rehydration between each cycle.
Seaweed Preparation Guide
Preparation
Chef Tips
Unlock the deep umami potential of GRO seaweeds with these simple steps. Start by soaking your dried seaweeds in cool, filtered water for 5-10 minutes until relaxed. Rinse thoroughly to remove any natural sea salt or grit. Once rehydrated, they are ready to be sliced for salads or added directly to simmering broths where they will continue to release their mineral-rich essence.
Elevate your cooking by treating seaweed as a versatile pantry staple. For soups and broths, use the soaking liquid as a base—it’s packed with nutrients and flavor. Finely shredded dulse adds a smoky depth to fresh salads, while kombu is indispensable when boiling grains or legumes, significantly enhancing digestibility and adding a subtle, savory brine that defines coastal cuisine.
Troubleshooting & FAQs
My kit isn’t pinning — what should I do?
Patience is key! Ensure your kit is in a spot with indirect light and consistent humidity. If it's been more than 14 days, try a 'cold shock' by placing the bag in the fridge for 12 hours to trigger growth.
Seaweed too salty? How to balance the flavor.
Wild seaweed carries the essence of the ocean. For a milder taste, increase soaking time and rinse thoroughly in fresh water at least three times before cooking. This preserves the nutrients while tempering the salinity.