Organic Blue Oyster ‘Spray & Grow’ Mushroom Growing Kit

$29.99

Our beginner-friendly, USDA-certified Organic mushroom kits make growing your own mushrooms so easy.

Just open the front of the box, cut an “X” into the plastic bag, spray with water 2-3 times a day, and watch them grow!

What's Included

Each Kit Includes:

  • 1x Spray & Grow Box
  • 1x Spray Bottle
  • Detailed Instructions
Specifications

Shelf Life: 6 months (refrigerated)
Kit dimensions: 10"(H) x 5"(W) x 5"(D)
Kit weight: 4 lbs

Instruction Booklet (included in Kit)

Using a Spray and Grow Kit

Product Details

Why We Love Them:

Blue oyster mushrooms are velvety, savory, and mild and pair perfectly with just about any recipe! Blue oysters are a staple here at North Spore (going all the way back to when we began as an urban farm.) After perfecting our blue oyster kits over the years, they’ve become one of the easiest kits to get multiple fruitings from and should produce a second flush of mushrooms (or more!)

100% Guaranteed.

Our blue oyster mushroom kits are reliable producers and tend to yield large flushes of beautiful light grayish-brown to deep blue-gray mushrooms when given adequate humidity. With continued proper care, you should be able to get multiple flushes. We 100% guarantee your first flush of mushrooms, but hope you'll try for 2 or 3!

It's Mycelium!

Your kit includes an amended sawdust block fully colonized with mushroom mycelium. It may appear covered with a soft, white substance - that's the mushroom mycelium! It is completely normal and means your kit is packed with fungi ready to fruit. The mycelium of some species is more prominent than others.

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Frequently Asked Questions

Inside your Spray & Grow Kit is a living organism, so we recommend activating it upon receipt. If you need to wait, they can be refrigerated for up to 6 months. 

It's important to get the area where you cut open the bag nice and damp! Try 5-10 sprays each time. If the surface of the block seems very dry the next time you spray it, you should give it a bit more water or water a bit more often. If you run AC or live in an arid climate, using a humidity tent can be useful to prevent your block from drying out.

We guarantee at least one fruiting of mushrooms off your kit, but it is possible to have multiple fruitings with care and patience. In terms of yield, you can usually expect your first flush to be somewhere in the range of 1/2 of a pound to 2 lbs. Each subsequent fruiting will likely be smaller as the fungi use up nutrients in the substrate.

The word fruit can be very specific, referring to foods like berries and apples, or a bit more general to refer to how an organism reproduces. So tomatoes and rosehips are the fruits of those plants; they contain the seeds. Mushrooms are the fruits of a fungus; they contain spores. So when a fungus starts to produce mushrooms, we call that fruiting.

Hold the cluster near the base and spin them. If you'd rather use a knife and cut them, that's fine too! Clean off any loose bits from the kit before continuing to spray and cut off any bits of sawdust from the block on your mushrooms before cooking and eating them.

After removing the front panel of the box along the perforated lines, cut an X into the exposed plastic. Remember to leave the plastic flaps of the X on the bag, they'll help to keep moisture in. The mushrooms will easily grow out of the sliced X section, so no need to open it up more as they fruit.

Absolutely! Mushroom cultivation is a great activity to do with the whole family, whether you'd like to grow indoors or outdoors. If you're new to mushrooms, we recommend starting with a Spray & Grow Kit or a Plant & Grow Kit – both make it easy to grow fresh, organic mushrooms at home.

We want you to have the best possible experience with every North Spore product and guarantee free replacements within 30 days of receipt for any damaged, contaminated, or unusable product.

We recommend absolute beginners start with our Spray & Grow Kits, which make growing mushrooms at home super easy.

Cluster of brown-capped mushrooms with long, light-colored stems against a white background.

Fresh Mushrooms at Home, Fast

Spray & Grow kits bring the magic of mushroom cultivation to your countertop. In as little as two weeks, you’ll be harvesting gourmet mushrooms right at home—no special equipment needed.

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