Our grow kits are all guaranteed to grow!

Please check for damage on arrival (cracks in the substrate) and start the process below within 24 hours. If you need to delay growing the kit, the box can be refrigerated until you are ready to use it.

If you suspect damage has occurred or your kit has not sprouted within a week, please message us via the contact form on our website.

If you or someone you live with has a mushroom allergy or intolerance, it is best to grow the kit in a room that is not frequented.

What you'll need

Sharp blade

Indoor location

Clear plastic tub

First Crop

Day 1 - Getting Started

Shiitake Mushroom Grow Kit

step 1

Put the kit into your fridge overnight, the cold shock helps to initiate mushroom growth.

step 2

Once the kit has been chilled overnight, remove it from the fridge and give it a few firm smacks, this is another technique used to help initiate mushroom growth.

step 3

Carefully remove the block from the bag.

It is best to do this over a sink or outside as some juices will leak out.

step 4

Choose a warm spot indoors to for the tub to sit in that has plenty of air movement and is out of direct sunlight e.g. the kitchen bench, lounge or bathroom.

Do not leave them near a heater in winter or an air conditioner in the summer as these can dry the mushrooms out.

Days 2-14

Shiitake Mushroom Sprouting

Step 1

Place the block inside the clear plastic tub and put the lid on leaving a gap of 1-2 centimetres to allow some airflow. Place the block upright, with the smooth surface on the bottom. The block will need to stay in the tub for its entire growth cycle to prevent it from drying out.

The 27L Sistema Tubs are the perfect size. We would not recommend any smaller as the mushrooms need space to grow. 

Step 2

Keep an eye on the kit over the next week. You should see your first sprouts within seven days. A few days earlier in the warmer months, or longer in the cooler months can be expected.

Please email us a picture if you do not have sprouts appearing after 7 days.

Days 8-15

Shiitake Mushroom Grow Kit

step 1

Success! The first sprouts are now popping up. Keep a close eye on them now as the growth will be very quick. Depending on the time of year, it can be anywhere from 3-7 days. 

Harvest Time!

Shiitake Mushroom

step 1

Harvest your mushrooms as soon as the caps flatten or start to become wavy.

If there are a few mushrooms much larger than the others, harvest them first and give the rest some more time to mature.

step 2

Cut the mushrooms from the block as close to the surface as you can. Avoid pulling them off as this will damage mycelium and may lead to contamination.

We like to store the mushrooms in paper bags or a tub lined with paper towels. The mushrooms will last up to 5 days in the fridge if kept in a plastic container that is lined with paper towels.

Second Crop

Get Ready for Round 2!

Shiitake Mushroom Harvest

step 1

After all mushrooms have been cut off the block, give the tub a quick wipe with a paper towel and put it back in the tub so that it can start to regenerate.

The second crop can take anywhere from 14-21 days to sprout. Faster in summer and slower in the winter months.           

step 2

Monitor your kit for the next couple of weeks and watch as it begins to regenerate.

If you notice any green or black growth at this point please email us a photo and we will be able to help.

step 3

Do not worry if only a few mushrooms sprout, they will get huge!

It may take a bit longer for them to develop the second time round but do not worry, they will get there eventually.

step 4

Harvest the second crop as the mushrooms mature, this may be in stages. After all mushrooms have been cut, you can repeat the steps above and try for a third!

Once the block has stopped producing, it can be composted or used as a top mulch for your garden beds. Worms love it!