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Black King Oyster Mushroom Grow Kit Mushroom Grow Kit That Mushroom Guy

Skill Level:

Growing Time:

Shelf Life:

Ideal Fruiting Temp:



7-14 days

3 months (refrigerated)

13°C - 21°C

810g - 1260g

Please Note: These yield numbers are estimates and actual results can differ, as they're based on the concept of Biological Efficiency. Want to dive deeper into what Biological Efficiency is?

Black King Oyster Mushrooms - The Exotic Addition to Your Menu

Black King Oysters are scrumptious and versatile mushrooms that add a welcoming delight to any meal. The flavor is reminiscent of your classic Oyster Mushrooms, but with large fatty stems like the King Oyster. Cut into lengthwise slices they can be prepared into vegan bacon that will even make the most committed carnivores think twice. Cut stems crossways tomake sweet, tender, vegan scallops that will have your mouth watering like Pavlov's dogs.

Grow In 3 steps

Grow in 3 steps

100% Chemical Free

100% chemical free

Farm Tested

farm tested

New South Wales

proudly made in nSW

Shipping Policy

Processing Time

We are working from Mon-Fri days. Our cutoff time is 2.00 pm, the processing time begins from the date you placed your order. 



Shipping Service

Shipping Cost

Handling Time

Transit Time


Australia Parcel Post


0-7 Business Days

2-8 Business Days



1. Shipping times will be affected during public holidays; manufacturers and couriers will limit their operations at these times. This is outside our control. Normal service resumes immediately after each holiday.

2. Incorrect address details and other issues may cause a delay in delivery.

Tracking Your Order

You will receive an email notifying you once your order has shipped. The email will include a unique parcel tracking number. The status of your order can be checked at Australia Post Tracking site


Damage during transit

For any items damaged during transit please contact us with in 5 days with photos so we can arrange immediate refund or replacement.


Cancellation is accepted until we have posted your items. Please contact us ASAP if you wish to cancel your order.

 For further inquiries:


+61 428 123 305

Refund and Return Policy

Refund and Return Policy

Thankyou for your purchase. I hope you're happy with your purchase. However, if you are not satisfied with your purchase for any reason, you can return for a full or partial refund or exchange.

All returns must be postmarked within 14 days. The mushroom kits are “alive” and must be returned ASAP, so they do not die and can be reused by growing the mushrooms ourselves. The box can be opened however, the kit must be unused and returned with all contents.

Return Process
To return an item please email me at to get our return address. Sometimes we may not require the return but may ask for photos of the issue. If the return is for a change of mind, you will be responsible for the cost of postage, and we ask that you use postage with tracking please.

After we have received your return or photos and inspected it, we will immediately process your refund, please allow up to 7 days for the processing time.

For further inquiries:
133 Plunkett St, Nowra, New South Wales, Australia, 2541
+61 428 123 305

Frequently Asked Questions


Depending on species you may get 2-4 flushes. But we guarantee at least one flush of mushrooms.

There are many factors which determine the amount of flushes. Mushrooms are a living organism and it is quite a skill to cultivate them. Humidity, fresh air and temperature are the pillars of mushroom cultivation.


Besides a hand of playing cards of the same suit. A "flush" in mushroom cultivation is each crop or harvest of mushrooms. Depending on species, they usually appear once every 7-14 days.


Most mushroom kits are token size, ours weigh between 2.2 and 2.6kg. They are what the mushroom industry calls "fruiting blocks".

That said, depending on species, first flushes usually yield 400g-1kg.

Each subsequent flush is usually smaller.


Remove your block from the plastic packaging and

Bury your block in the garden and cover with mulch or soil - this will encourage them to flush again!


Break it up and use as mulch


When there isn't enough humidity around the block, mushroom pins usually stop growing. Don't be alarmed! Your mushroom kit is still alive and can fruit. Simply remove the dried-up pins (mushrooms) and leave the block to rest for a week. After that, soak the block in cold water for 20 minutes, remove all the water from the bag, and begin again.

Top view of some Black King Oyster Mushrooms

Black King Oysters are Nutritional and Medicinal

They’re also insanely nutritional. They are low in fat and carbs while being packed with protein and other nutrients. They are an excellent source of Copper, Zinc, Manganese, Vitamin B, and Vitamin D. They are also rich in antioxidants and may have health benefits for the heart, blood sugar regulation, and your immune system. Not to mention, mushroom fibers are well known to have prebiotic properties.
Black King Oyster Mushrooms ready to be harvested

Grow It Yourself!

You want to harvest right before the margin of the mushroom cap begins unfurling toward the sky and the mushroom becomes trumpet-shaped. If you wait a little too long, there’s no harm done! The mushrooms are still delicious. Over the next two months, you can expect another 2-3 flushes if the conditions allow!

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That Mushroom Guy admiring a cluster of Black King Oyster Mushtrooms

Explore Mushroom Traits, Growing Tips, and Culinary Uses

With our specially prepared mushroom grow kits you can now grow these mushrooms at home. It's easy and with guaranteed results, even for those with no experience! It only takes a little space, a bit of care, and you will reap the rewards. Watching them grow is half the fun!

Prefer Cooler Temperatures

When cultivating Black King Oyster mushrooms, temperature control is key. Ideally, these mushrooms prefer temperatures ranging from 10° to 21°C degrees. A couple of degrees difference may be acceptable, but for optimal growth and pinning, Black King Oyster mushrooms really thrive at 21 degrees or below. Keep these conditions in mind when using our Black King Oyster mushroom grow kit to ensure a successful and abundant harvest.

Step-by-step Instructions

After some time you will begin to see small dense clumps of mycelium developing at the cut. This is where it gets fun! These little clumps will slowly inflate over 7-14 days into full-sized Black King Oyster Mushrooms

That Mushroom Guy admiring a cluster of Black King Oyster Mushtrooms

How Do I Grow It? 

  • Step 1
  • Step 2
  • Step 3

Place your block on its side and where the block presses against the plastic, take a sharp clean knife and make a 10-12cm cut along this part of the bag (you could cut an “x” shape or a simple line). 

Place your sliced bag in a humid part of your home (near the kitchen sink or bathroom). Make sure it is kept away from direct sunlight, and keep it well hydrated. Do this by spraying the outside of your block, over the sliced area, with water at least once per day but preferably 2-3 times.

The mushrooms can take 2-6 weeks to fruit, but will usually appear within 5-7 days. Once they appear, keep watch, they grow very fast and will be ready to harvest in 7-21 days. Harvest them all at once by gently grasping the mushrooms at the base, twist and pull.

Customer Reviews

Based on 104 reviews
Colin Shrubb
Black peacrl

Brought two kits no mushroomsgrew

Hi there, we're sorry to hear that your kits did not produce any mushrooms. We would be happy to assist you with troubleshooting and finding a solution. Please reach out to us at and we'll do our best to help. Thank you for your feedback.

Josephine Howard
Happy Mushrooms

I was more than happy with this purchase, Instructions easy to follow and grow as advertised. The feedback to my question was quick and supportive, Thanks.

Thank you for the fantastic review! I'm glad the instructions were clear and that you're pleased with the growth. I'm here whenever you have questions or need support. Happy growing!

Lena S
Oyster mushroom kit

Excellent kit, mushrooms grow well and my mushroom obsessed son was fascinated

Thank you so much for your review of our Winter White Oyster Mushroom Grow Kit. We're thrilled to hear that your mushrooms grew well and that your son enjoyed watching them grow. Happy mushroom growing!

Lucy Simon
Best mushrooms

I will now get mushroom packs over buying from the supermarket. They taste great, and its really enjoyable watching the sudden (and often massive) growth overnight.

Thanks for the review Lucy. I still get surprised at how fast they grow, sometimes I take the kids out for the day, only to return and the mushrooms have galmost doubled :)

Deb Duncan
Great Kit and Service

We travelled from Melbourne to Nowra for a family catchup after Christmas and wanted a mushroom kit as a present. Brett was fantastic to deal with, nothing was a problem, and I was able to pick up the kit from his home. From all reports the Pink Oyster kit is doing well, thanks so much for such an easy exchange! Deb

Hi Deb, thank you so much for your kind words and for choosing our Pink Oyster Mushroom Grow Kit as a gift. We're glad to hear that your kit is doing well and that you had a pleasant experience with us. It was our pleasure to assist you and we hope to see you again soon. Happy mushroom growing!