Organic King Trumpet Mushroom Grow Kit Fruiting Block

1-Pack
$29.99

Our Certified Organic king trumpet mushroom fruiting blocks make growing your own mushrooms so easy.

Pack Size

discount-eligible

all

discount-eligible-manual-with-exclusions

mushroom-fruiting-block-kits

fruiting-block-kits-deal

SELECTED: fruiting-block-kits-deal

Limited Time Offer
Buy 2 Blocks, Get 1 Free
All Plant & Grow Garden Starters + Fruiting Blocks
Use code: BLOCKPARTY

In Stock. Ships in 2-5 business days.

USDA Certified Organic

USDA Certified Organic

Trusted by 350K+ Growers

Trusted by 350K+ Growers

Money Back Guarantee

Money Back Guarantee

Experience the unique culinary delight of King Trumpet mushrooms right from your home with North Spore's Organic King Trumpet Mushroom Grow Kit.

This USDA Certified Organic fruiting block provides everything needed for successful indoor cultivation. Our mycologist-developed blocks are ready-to-fruit upon arrival, ensuring a straightforward growing process.

King Trumpets (Pleurotus eryngii) are celebrated for their meaty texture and earthy, savory flavor. Expect up to 0.5-2 lbs from the initial flush, with potential for multiple harvests from a single block.

Designed for intermediate growers, this kit thrives in an indoor environment. Simply follow the included instructions to create ideal conditions for robust mushroom development.

Backed by North Spore's scientific expertise and 100% Grow Guarantee, you can cultivate with confidence. Access our comprehensive guides and educational resources for support.

Begin your journey into gourmet mushroom cultivation and enjoy fresh, organic King Trumpets anytime.

Receiving and Storage

Remove kit from the shipping box as soon as possible. Then, unfold the top of the bag, making room for air space. It's also important to check and confirm that the filter patch is not obstructed. This will help the organism breathe and continue to thrive!

Fruiting blocks should be used within 1 week of receipt. If you don't plan to use immediately, you can refrigerate your block for up to 6 months.

Growing Instructions

For the majority of mushroom species, all that is needed to initiate fruiting (or begin the growth cycle) is a change in environmental conditions -- specifically humidity, light, temperature, and changes to oxygen and CO2 levels.

For best results:

We recommend growing your king trumpet block in a fruiting chamber (like a monotub or martha tent) as a controlled environment will decrease the risk of contamination and increase the chances of success. 

Creating optimal conditions:

The environmental parameters for king trumpet mushrooms can be found on this page under "Temp, Humidity & CO2 guide" and on page 11 of our fruiting block instruction booklet.

Preparing your block:

Unfold the top of the bag, making room for air space. It's also important to check and confirm that the filter patch is not obstructed.

How to initiate fruiting:

  • Make a small (2-3”) cut at the top of the bag under the top seam and place upright in your fruiting chamber.
  • Allow the block to pin within the bag.
  • If slow to pin, place the bagged block in the refrigerator for approximately eight hours before returning to the fruiting chamber.
  • Once pinning has occurred, cut off the top of the bag, leaving sidewalls approximately 4” taller than the block.
  • Return to fruiting chamber until ready to harvest.

Special considerations:

King trumpet mushrooms are prone to blotch (dark spots on the fruiting bodies) with excess humidity or direct moisture.

Harvesting your mushrooms:

King trumpet mushrooms are best harvested right before the caps flatten out; good shelf life.

Growing different blocks together:

With some compromise, many different species of mushrooms can be grown together in a fruiting chamber. First, consider the temperature range of the mushrooms you desire to grow, and second, the CO2 sensitivity. Humidity ranges overlap for the majority of species. We encourage you to experiment with many different groupings!

Troubleshooting:

Having issues with unusual growth, stunted growth, or no growth at all? Refer to pages 16-18 in our fruiting block instruction booklet.

Temp, Humidity, & C02 Guide

Temperature 50-65°F  |  10-18°C
Humidity (Phase 1: Primordia)95-100%
Humidity (Phase 2: Fruitbody)85-95%
CO2 Sensitivity (Phase 1: Primordia)High CO2, keep in bag
CO2 Sensitivity (Phase 2: Fruitbody)<2,000 ppm

  • Primordia -  The earliest recognizable stage of fruitbody development. Also known as “baby mushrooms” or “mushroom pins.”
  • Fruitbody - A fully grown mushroom, the reproductive structure of the organism in which the spores are produced.
  • CO2 sensitivity - When CO2 levels are too high, yields will decrease, stems will become long and stringy, caps will be small, and/or growth will halt.

 

Related Articles

Upgrade Your Grow
&quot;Boomr Bin&quot; Monotub
"Boomr Bin" Monotub (+$29.99)

The best grow chamber for bulk substrate

Automated Monotub
Automated Monotub (+$149.99)

An ideal growing chamber for 1-2 fruiting blocks

Wine Cap Garden Bed Kit
Wine Cap Garden Bed Kit (+$44.99)

Try growing outdoors

Boom Room II
Boom Room II (+$479.99)

The best growing chamber for 4+ blocks

Frequently Asked Questions

Fruiting block kits are mushroom grow kits, but tend to be larger (5 lbs) and some require a bit more care depending on species. Instead of boxes, they are bagged. We recommend growing them in a fruiting chamber such as a monotub or martha tent set up like our BoomRoom. A controlled environment will produce the best results for the fruiting blocks. And, since these kits are slightly larger, they can produce more mushrooms than our Spray & Grow Kits.

Oyster mushrooms and lion's mane mushroom fruiting block kits are great for beginners because they are reliable producers and require the least amount of effort. Reishi is also great because the mushroom grows in the unopened bag (no special care or fruiting chamber required!)

All kits should grow a minimum of one flush of mushrooms, but with a little patience and skill you can often get a second or third flush depending on the species! After you’ve harvested your first flush of mushrooms, remove any growth from the block and follow these instructions:

⮕ If you have a martha tent or an automated fruiting chamber, leave the humidity and fan running and wait about 2 weeks for new pins to begin forming.

⮕ If you are using a monotub or non-autmated fruiting chamber, open 2x daily and spray blocks generously with water. Try not to expose the blocks for too long to decrease chances of contamination.

⮕ If you don't have a monotub, martha tent, or fruiting chamber cover the block with a humidity tent made from a large plastic grocery bag with LOTS of small, quarter-sized holes. Remove the humidity tent 2x daily and spray blocks generously with water.

Be patient: It's totally normal for it to take longer for mushrooms to appear with each subsequent fruiting. However, if there's no progress after two weeks, it’s a good idea to soak your block.

Soaking your block: Take your block out of the bag and soak in a bowl of cool water. Most species only need to soak for 20 minutes. However, only soak your lion's mane block for 5-10 minutes as these blocks tend to break apart if soaked for too long. After soaking, let the block drain by leaving it cut side down for another 10 minutes or tip it around to let extra water run off. You don't want to leave standing water in your bag, so pat your block dry with a towel before placing it back in the bag.

Note: Shiitake blocks should not be placed back in the bag.

For most species, you should leave the block in the bag for the entire duration of the growing cycle. However, there are some exceptions.

⮕ Shiitake should be removed from the bag before going into the fruiting chamber.

⮕ Nameko should have most of the top of the bag cut off (leaving about 4" of plastic above the block) before going into the fruiting chamber.

Our fruiting block kits are made fromsawdust blocks that have been ammended with substrate supplements.

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

Backed by Our 100% Grow Guarantee

Every kit comes with our 100% Guarantee: You’ll get your first flush of mushrooms, or we’ll make it right. With over 350,000 happy growers, North Spore is trusted by hobbyists, chefs, and mycologists alike.

Reviews