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Mushroom Growing Kit Problems, Tips and Tricks

Grey oyster mushrooms growing in a cluster from a rectangular block on a wooden surface outdoors.
Grey oyster mushrooms growing in a cluster from a rectangular block on a wooden surface outdoors.

Emulating Nature with Your Mushroom Grow Kit

Using a Mushroom Grow Kit is about replicating the natural environments where mushrooms thrive. After a rain shower, mushrooms often appear, and we aim to simulate these conditions when misting our kits. Aborts, contamination, and browning are natural parts of the mushroom lifecycle. Learning to minimize these effects while maximizing growth is part of mushroom cultivation.

Different mushroom species grow at various times due to their temperature preferences. Using a mushroom grow kit, we create an environment that tricks the mycelium into thinking it’s the perfect time to fruit. We can adjust conditions to grow species outside their natural temperature range.

As we gain experience, we refine our techniques and deepen our understanding of these fascinating organisms. Growing mushrooms becomes more than a hobby or food source; it connects us to nature and life’s intricate processes, celebrating the resilient nature of fungi.

Challenges are inevitable and may impact your yield or cause crop failure. Don’t worry – this guide will help you identify and troubleshoot common issues with mushroom grow kits. With some guidance and care, you’ll soon be a successful home mushroom grower.

1. Mushrooms Not Growing

If your mushrooms aren’t growing, several factors could be at play:

Temperature Control: Most mushroom grow kits thrive within a temperature range of 18-24°C, though this can vary by species. If temperature is a concern, move your kit to a more controlled environment or use a small heater or cooler to maintain the optimal range.

Air Circulation: Poor air circulation can hinder growth. Ensure your growing area has adequate ventilation.

Moisture Levels: Insufficient moisture is another common issue. Regularly mist your kit to maintain the necessary humidity.

Contamination: Contaminants can prevent mushrooms from growing. Keep your growing area clean and monitor for any signs of mold or unwanted organisms.

Creating an optimal environment is key to the successful cultivation of your mushroom kit. Each factor plays a crucial role in ensuring your mushrooms flourish.

2. Slow Growth

When using mushroom grow kits to cultivate your own mushrooms at home, slow growth can sometimes be a concern. This might be due to the temperature being too low, insufficient moisture, or poor air circulation. It’s crucial to create a warm, humid environment with good air circulation for your mushroom kit to flourish.

Remember, good air circulation doesn’t mean using a fan directly on the kit or leaving it outside, as these actions can lead to your mushrooms drying out or turning brown. Instead, consider a location with natural air movement and avoid placing your mushroom kit in sealed boxes or plastic containers. Mushroom kits are living organisms and require proper air exchange to thrive.

Keep observing and learning from your mushroom grow kit’s growth patterns. Over time, you’ll be better equipped to create the ideal conditions for a successful mushroom harvest.

3. Dealing with Contamination

Contamination is a common issue that can arise from various factors, such as inadequate hygiene practices, poor air circulation, or a contaminated substrate. Signs of contamination include mold, bacterial growth, or unusual colorations on the substrate’s surface. If you encounter such issues, it’s advisable to discard the kit. If contamination occurs before the first flush, please contact us at [email protected] for a replacement kit.

Despite our meticulous care and attention, a kit might occasionally arrive contaminated. This issue isn’t exclusive to our operations; all mushroom farms grapple with contamination at some point. Any business claiming complete immunity from contamination is misleading you. Therefore, if you discover any contamination, please contact us immediately so we can identify the cause and rectify the situation swiftly.

4. Small, Stunted, or Deformed Mushrooms (Aborts)

When growing mushrooms at home, you might sometimes encounter small, stunted, or deformed mushrooms, also known as “aborts.” This can occur due to factors such as low humidity, insufficient airflow, or improper lighting.

To prevent this, it’s essential to create a humid environment with good airflow for your mushroom growing kit. Regarding lighting, mushrooms don’t require as much light as plants. If you can see the mushrooms, that’s typically enough light for them to grow. However, it’s crucial to avoid direct sunlight, as it can negatively affect their growth.

By carefully monitoring and adjusting the conditions of your home mushroom growing kit, you can avoid the occurrence of “aborts” and enjoy a successful mushroom harvest.

5. Yellowing or Browning Mushrooms

When growing mushrooms at home using your mushroom kit, you might notice them turning yellow or brown. This typically indicates that they are drying out, which can be caused by over-misting, a drafty room, low humidity, or excess light. To prevent this, ensure your mushrooms receive adequate moisture and that the growing environment maintains consistent humidity.

For Lion’s Mane mushrooms, yellowing can also indicate they were ready for harvesting about 12 hours earlier. Harvesting Lion’s Mane mushrooms can be challenging, as it takes experience to determine the optimal time. Generally, these mushrooms should be harvested before they start turning yellow, but developing the experience to know this precisely takes time.

Interestingly, it’s often best to harvest Lion’s Mane mushrooms while they are still in their ‘cloud-like’ formation for the best culinary experience, even if this results in a smaller yield. As you continue to grow mushrooms at home, you’ll become more familiar with these signs and how to respond to them for a successful harvest.

Tips and Tricks

1. Maintain Optimal Conditions: Keep the kit in a warm and humid environment with good air circulation.

2. Provide Adequate Moisture: Use a misting bottle to keep the mushrooms moist.

3. Avoid Direct Sunlight: Direct sunlight can cause mushrooms to dry out and turn yellow. Place your kit in a location with indirect light.

4. Harvest at the Right Time: For the best culinary experience, harvest the mushrooms when they are still young.

5. Monitor Growth Conditions: If the mushrooms are not growing, check the temperature, air circulation, moisture levels, and potential contamination issues.

6. Practice Cleanliness: Use clean equipment and work in a clean environment to avoid contamination.

7. Understand Species Requirements: Research and understand the specific growing requirements of the mushroom species in your kit.

8. Stay Persistent: Don’t be discouraged by failures or setbacks – growing mushrooms can be a learning process.

Brett Mather holds large clusters of pink and white mushrooms in a room filled with mushroom grow bags.

Former owner of That Mushroom Guy, which was acquired by Rootlab in September 2025.

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