Chestnut Ready-To-Fruit Block Outdoor Mushroom Bed

Chestnut Mushrooms emerging from a bed of pine needles on the forest floor

*Your blocks are meant to be opened and plantedimmediately for best results. Ready-to-fruit blocks will begin producing mushrooms 3-6 weeks after planting, but they can be refrigerated up to 2 months prior to opening.

Chestnut ready-to-fruit blocks can be buried outdoors in late summer to early fall in wood chips or sawdust for a fall fruiting. Planting these blocks requires just a shaded, protected area in your yard and mulch to cover the blocks. Follow the five steps below for fruiting your Chestnut blocks.

Fruiting Chestnut Mushroom Blocks

Building Your Ready-to-Fruit Chestnut Bed:

1) Select a Bed Location
Like all fungi, Chestnut mushrooms prefer areas that are protected from the elements (primarily from the sun and wind). Find an area in your yard protected from the wind and well-shaded. Clear away any sticks from the area to allow for an even planting surface.

2) Building the Bed Foundation
Fully remove your chestnut blocks from the filter patch bag. Set your blocks down in a square formation with approximately one inch in-between each block (Figure 1). The space in-between the blocks will allow the Chestnuts to grow from all sides of the block. We recommend using at least 4-blocks for this method at a time. If you purchase an 8-block set and would like to do this in two sets, keep unused blocks refrigerated until you are ready to plant a second set. Blocks will stay good refrigerated up to 4 months.

3) Mulching your Blocks
Mulch over and around your blocks with wood chips or sawdust (Figure 2). Other materials such as pineneedles and leaves can be used as supplemental material, but woody material holds the moisture in more effectively. Aim for 3-5 inches of mulch on the edges of the bed and 1-2 inches on top to provide adequate coverage. Gravity will eventually get the better of your mulch, pulling it down and exposing the corners of your blocks. Simply scoop the mulch back up and onto your blocks to minimize bare spots.

4) Mushroom Harvest and Storage
Start to monitor your blocks after 3 weeks by simply walking past your bed. Chestnut take anywhere from 3-6 weeks to fully recover and develop. Outdoor production is often determined by seasonal temperature changes and each bed may take slighty shorter or longer depending on planting date. Chestnut fruiting temperature ranges from 55-70°F. Harvest the entire cluster once the average cap size is that of a quarter (Figure 3). Mushrooms need to be stored in the refrigerator until consumed or sold. A semi-breathable container such as a paper or cloth bag is ideal for reducing condensation and excessive wetness that will reduce the shelf life of your bounty.

5) Second and subsequent crops
After harvesting your first crop re-mulch any exposed areas of the block. Depending on the time of initial planting you may see a second crop within another month, and possibly one in the following spring when the temperatures hover in the fruiting temperature range. When your blocks are done producing, let them sink into the forest floor or add them to your compost pile.

Time to fruiting:
3-4 weeks after planting.
Ideal Fruiting Temperature:
Mushroom appearance:
Rich red-brown colored cap textured with tan scales. Grows in clusters. Tan stems.
Flavor and texture:
Nutty with a pleasant crunchy texture maintained after cooking.
Find the Blocks:

Blocks ready for mulching.

Four ready-to-fruit chestnut mushroom blocks on the ground

Mulching in blocks with wood chips

Arm holding pitchfork at a diagonal, moving woodchips from a pile on the forest floor

Chestnut mushrooms ready for harvest.

clusters of orange chestnut mushrooms emerging from a chestnut mushroom bed on the forest floor