Shiitake Mushroom Growing Kit
Shiitake Mushroom Growing Kit
Grow fresh, deeply umami shiitake at home in 14 to 21 days. Beginner friendly, app-controlled, with the chamber handling the cold-shock cycle that shiitake needs to fruit.
Pick Your Kit
Two routes in. If you already own a humidity tent or fruiting chamber with a cold-cycle option, you only need the colonized substrate. If you are starting from zero (or you want year-round growing across 28+ species), the bundle pays for itself across your first six to eight blocks. Use the configurator below to compare both routes side by side.
Just the Block ($29.95)
The 5lb fully colonized block is the same substrate we ship inside our bundles, sold as a stand-alone for growers who already have a fruiting setup. It arrives in a breathable autoclave bag, fully brown-myceliated (shiitake develops a chocolate-brown skin as it matures) and ready for cold-shock within 24 to 48 hours of acclimation. Best for advanced growers, classroom demos, restaurant chefs, or anyone running an existing martha tent with a cold-water bath ready to go. Single-block yield is typically 0.7 to 1.0 lb across two flushes when fruited manually.
Block + Smart Chamber Bundle ($329)
The bundle pairs the block with the Lykyn Smart Chamber, a USB-C powered, app-controlled fruiting box that holds 85 to 92% humidity automatically across 28+ species presets and runs a programmed cold-shock cycle between flushes. Pick ‘Shiitake’ in the app, drop the block in, and the chamber handles misting, fresh-air-exchange, lighting, and the temperature drop that triggers pinning..m., the bundle saves money and the manual cold-shock chore. Typical yield jumps to 1.0 to 1.5 lb per block.
Build your kit
Pick Your Kit
Two ways in. Pick the path that matches your setup, and the total updates live.
How many fruiting blocks?
Add a Lykyn Smart Chamber?
Pick a chamber colorway
Your kit total
$328.95Want to read more first? See the FAQ →
How Shiitake Grows: 4 Steps
Shiitake is the one Lykyn species that needs a cold-shock to fruit, and that single step is what separates a heavy crop from a silent block. The full cycle from box-open to first harvest is four steps and roughly three weeks.
Acclimate the Block (24 to 48 Hours)
Pull the block out of the shipping box as soon as it arrives and let it rest at room temperature (65 to 75°F) for 24 to 48 hours. Transit can swing the block between cold trucks and warm porches, and shiitake mycelium fruits best when the substrate is not in thermal shock going into the cold cycle. Leave the bag sealed during acclimation. The brown skin may look uneven or wrinkled from shipping; that is normal and the mycelium will re-firm during the rest.
Cold-Shock the Block (12 to 24 Hours)
This is the step that makes shiitake shiitake. Submerge the sealed, acclimated block in ice water held at 35 to 50°F for 12 to 24 hours. Use a clean cooler, utility tub, or kitchen sink with bagged ice on top; the block is heavy enough that you may need a weight to keep it under. The cold drop tricks the mycelium into thinking winter has arrived, which in nature is the signal to push reproductive fruit. Without it, the block will sit silent for weeks; with it, pins appear within days. The cold-shock has to be repeated between every flush to wake the block back up, which is where the chamber’s automated cycle pays off.
Hold 85 to 92% Humidity at 55 to 72°F
After the cold-shock, dry the bag, cut a single 4-inch X-shape or two parallel 3-inch slits, and move the block into fruiting conditions. Shiitake needs sustained 85 to 92% relative humidity and tolerates a wider temperature band than oyster or Lion’s Mane: 55 to 72°F covers most home interiors year-round. With the Lykyn Smart Chamber, the chamber holds the target band within ±2% on its own.
Harvest in 14 to 21 Days
Pin formation usually starts on day 5 to 8 after the cold-shock, noticeably slower than oyster (2 to 4 days) or Lion’s Mane (3 to 5 days). The caps emerge as small brown buttons and unfold over the next week. Harvest when the cap edges have rolled out flat but the underside gills are still pale tan, before the cap fully flattens and starts to curl up. A second flush typically arrives 14 to 21 days later if you re-cold-shock the block or run the chamber’s ‘rest and re-flush’ cycle.
Best Shiitake Strains for a Home Grow Kit
Not every shiitake is the same. Lentinula edodes covers dozens of cultivated varieties bred for different temperatures and umami profiles, and the best shiitake mushroom growing kit choice depends on your kitchen climate and what you want on the plate. Lykyn ships four strains as fully colonized 5lb blocks, each on a dedicated app preset.
Wide Range (WR46)
Lentinula edodes (WR46 cultivar)
for first-time growers
Donko
Lentinula edodes (donko grade)
for premium thick caps
Koshin
Lentinula edodes (koshin grade)
for fast summer harvests
Native
Lentinula edodes (wild-type)
for deepest forest flavor
Wide Range (WR46)
Wide Range (often abbreviated WR46) is the workhorse and the one we default to for first-time growers. It fruits across a generous 50 to 80°F window, pins faster than the other three strains (often by day 5 after cold-shock), and produces medium-brown caps with a balanced umami profile that drops into any recipe from miso soup to stir-fry. If you are buying your first shiitake mushroom growing kit, start here.
Donko
Donko is the Japanese premium grade and the one specialty grocers charge the most for. It fruits in cool weather (50 to 65°F), grows slowly, and develops thick, almost-spherical caps with the deep cracking that is the visual signature of high-grade dried shiitake. Flavor is the deepest of the four, with a concentrated, almost beef-broth umami that holds up to long braises.
Koshin
Koshin is the thin-cap summer strain and the fastest fruiter when rooms warm up. It prefers 65 to 80°F, produces flatter, wider caps with a lighter brown tone, and turns out a milder, slightly sweet umami that works well in fresh applications like sliced over rice or sautéed with butter.
Native
Native is our wild-type isolate, recovered from hardwood logs in the Appalachians. It has the longest fruiting cycle of the four (18 to 24 days) and produces irregular, slightly asymmetric caps with a deep forest-floor flavor that chefs ask for by name. Yield runs slightly below the cultivated strains, but the flavor sets it apart.
Estimate Your Year-One Harvest
Curious what a kit pays back in fresh mushrooms? Pick a strain, set how many blocks you plan to run and how many cycles per year, and the calculator below estimates total fresh-mushroom pounds plus retail-equivalent value (specialty shiitake retails $14 to $22 per pound, with Donko at the top of the range). The strain dropdown maps to the four cultivars above: wr46, donko, koshin, native. Most home growers run 6 to 8 shiitake blocks per year through a single chamber and end the year well ahead on the bundle’s price.
Year-One Harvest Calculator
Pick a strain, set blocks and cycles, see fresh-mushroom and retail value estimate.
Frequently Asked Questions
From the moment you pull the block from the cold-shock bath, first harvest lands in 14 to 21 days. Pin formation usually starts on day 5 to 8, and the caps grow visibly each day. A second flush follows 14 to 21 days later after a repeat cold-shock. The full cycle, box-open to second harvest, runs about 5 to 6 weeks, dramatically faster than log cultivation (6 to 18 months).
Yes, and a shiitake mushroom home grow kit is the most reliable way to do it. Shiitake fruits at normal indoor temperatures (55 to 72°F across the four strains we ship), does not need direct light, and tolerates apartment humidity better than tropical species. The two things it is fussy about are the cold-shock step and sustained 85 to 92% humidity, which is exactly what either a misting routine or the Lykyn Smart Chamber provides.
For someone using a fully colonized kit, yes. The hard parts (sterile lab work, grain spawn, contamination control, log inoculation) are already done before the block leaves us. What is left is the cold-shock and managing humidity for two to three weeks. Beginners running a WR46 block in the smart chamber report first-flush success rates above 92% in our customer surveys, with the automated cold-cycle removing the most common manual mistake (under-shocking the block).
Indoors is actually the better choice. Shiitake is a temperate-climate species, and a heated home in winter or air-conditioned home in summer sits well inside its 55 to 72°F fruiting range. You do not need a basement, garage, or dedicated grow room. Indoor growing also gives you full control over the cold-shock step, which is hard to time outdoors.
Two flushes is standard, and a third is a bonus. Flush one is typically the largest (55 to 65% of total yield), flush two follows after a repeat cold-shock and a 14 to 21 day rest, and a small third sometimes appears if the block stays hydrated. Total lifetime yield from a well-fruited shiitake block in the chamber runs 1.2 to 1.8 lb.
Shiitake has a deep, savory, distinctly umami flavor with a meaty, almost-leathery texture when fresh, and a more concentrated, smoky profile when dried. WR46 sits in the middle of the range, Donko delivers the deepest beef-broth umami, Koshin is lighter and slightly sweet, and Native carries an earthier forest-floor note. All four hold up to long cooking better than oysters or Lion’s Mane.
Direct from Lykyn. The 5lb fully colonized block is $29.95 and the Block + Smart Chamber bundle is $329. Both are beginner friendly and backed by our grow guarantee: if your first block does not pin after cold-shock, we replace it. For a deeper walk-through of the cultivation cycle, our deeper cultivation guide covers troubleshooting, advanced fruiting techniques, and second-flush recovery, and our step-by-step grow guide walks through how to grow shiitake mushrooms at home from day one.
The cold-shock is a 12 to 24 hour submersion of the sealed colonized block in 35 to 50°F ice water, and it is the single step that wakes shiitake mycelium into fruiting. In nature, shiitake fruits when seasonal temperatures drop sharply (the autumn chill on a forest log), and the mycelium reads that drop as the signal to push reproductive caps. Skipping the cold-shock is the most common reason a shiitake block sits silent for weeks. The Lykyn Smart Chamber runs the cold cycle automatically on the ‘Shiitake’ preset.
Ready to Grow Your First Donko?
Two paths, both end with thick, umami-loaded shiitake caps on your cutting board in two to three weeks. If you already have a fruiting setup with a cold-shock option, grab the 5lb fully colonized block for $29.95 in your strain of choice and start the acclimation this weekend. If you want hands-off, year-round, 28+ species growing with the cold-shock automated, the Block + Smart Chamber bundle at $329 pays itself back across your first 6 to 8 blocks. Either way, you skip the logs and start where shiitake actually grows on demand.
Donko block cold-shocked Friday, full harvest Sunday morning two weeks later. Thick caps, deeper flavor than the dried ones I buy from the Asian market. Worth the wait.
Cultivation, engineered.
Climate, automated.
Harvest, perfected.