Black Oyster Grow Kit - 5 lbs
Pairs well with
Grow fresh Black Oyster mushrooms at home in 7 to 14 days. The Lykyn Black Oyster grow kit is a 5 lb fully colonized fruiting block of Pleurotus ostreatus (dark variety) that delivers 2 to 3 harvests of charcoal-to-slate caps with deep umami. Pair it with the Lykyn Smart Grow Chamber and skip the daily misting and the contamination guesswork.
Black Oyster mushrooms are rich in nutrients and a popular choice for their strong umami flavor and meaty texture. With striking charcoal-to-slate caps and thick, satisfying stems, Black Oysters are a go-to mushroom for home cooks and chefs alike. Easy to grow, versatile in the kitchen, and beautiful to watch develop, this block delivers consistent harvests of one of the most practical and delicious gourmet mushrooms you can grow at home.
Black Oyster mushroom fruiting block details
| Specification | Detail |
|---|---|
| Species | Black Oyster (Pleurotus ostreatus, dark variety) |
| Block weight | 5 lbs, fully colonized |
| Expected yield | About 1 lb per harvest |
| Number of harvests | 2 to 3 flushes |
| Time to grow | 7 to 14 days per flush |
| Difficulty | Beginner friendly |
| Ideal temperature | 59 to 70°F (15 to 21°C) |
| Ideal humidity | 85 to 92% RH |
| Best environment | Lykyn Smart Grow Chamber |
| Substrate | Supplemented hardwood sawdust |
| Fresh shelf life | 5 to 7 days refrigerated |
Why we love Black Oyster mushrooms
Black Oyster mushrooms strike the perfect balance between gourmet flavor and everyday usability. Their dark, sculptural caps grow in layered clusters, creating a beautiful yet understated visual display. More importantly, they are one of the most satisfying mushrooms to cook with and eat.
- Deep umami flavor: Rich, savory, and mushroom-forward, Black Oysters deliver a bold umami taste that elevates any dish.
- Excellent texture: Thick, meaty stems and tender caps hold up beautifully to sauteing, roasting, and stir-frying.
- Nutrient-dense and low calorie: Black Oysters are low in calories and fat while being rich in fiber, vitamins, and minerals.
- Rich in essential nutrients: A great source of B vitamins (including niacin and riboflavin), potassium, phosphorus, and copper.
- Immune-supporting compounds: Contains beta-glucans and antioxidants that support immune function and overall wellness.
- Reliable and forgiving: One of the most consistent oyster varieties to grow, making it ideal for beginners and repeat growers alike.
How to grow your Black Oysters
- Setup: Fill your humidifier tank with distilled water and place the Black Oyster block inside your Lykyn Grow Chamber. Leave space in front of the block so mushrooms can grow freely, and be sure not to block the humidifier airflow.
- Sterilize: Flame sterilize a razor or knife and allow it to cool completely.
- Slice: Cut a small "X" on the side of the bag where you want the mushrooms to fruit.
- Select: Place the chamber top back on and choose "Black Oyster" from the Lykyn App.
- Relax: Your chamber automatically handles humidity and airflow. Just watch your mushrooms come to life.
When it is ready to harvest
Black Oysters are ready when the caps are mostly open but still slightly curved at the edges, the color is deep gray to nearly black, and the texture is firm and full. Harvest before the caps flatten completely for the best flavor and texture. Gently twist and pull the entire cluster from the base, or cut cleanly with a knife. Take care not to damage the remaining block so it can produce additional flushes.
How to store Black Oyster mushrooms
Store fresh Black Oysters in a paper bag in the refrigerator for 5 to 7 days, or several months if dried or frozen. Avoid sealed plastic containers, which trap moisture and reduce freshness.
Cooking tips for Black Oyster mushrooms
Black Oyster mushrooms are incredibly versatile and forgiving in the kitchen. Dry-saute first to release excess moisture and concentrate flavor, then add oil or butter once the pan is dry and cook until golden. Finish with salt, garlic, soy sauce, or herbs to enhance their natural umami. They are perfect for ramen, stir-fries, risotto, pasta, grain bowls, or as a hearty mushroom-forward main ingredient.
Preparing for a second or third flush
After harvesting, remove any leftover mushroom material from the surface of the block. Re-soak the block in cold, clean water for 12 to 24 hours. Drain thoroughly and return the block to your Lykyn Grow Chamber. Select "Black Oyster" again in the app and begin the next growing cycle.
Frequently asked questions
How long does it take to grow Black Oyster mushrooms?
With the Lykyn smart chamber, expect 7 to 14 days per flush from slicing the bag to harvest. The block then rests a few days before re-soaking and starting the next flush.
What do Black Oyster mushrooms taste like?
Black Oysters have a deep, savoury, umami-forward flavour with a meaty, slightly chewy texture. They shine in ramen, stir-fries, risotto, pasta, and any dish that benefits from a rich, mushroom-forward note.
Will the chamber stop working if Wi-Fi or Lykyn cloud goes down?
No. Your chamber runs the Black Oyster preset on-board after initial setup. Wi-Fi or Lykyn cloud downtime does not stop your grow.
Can I grow Black Oyster without the chamber?
Yes, the block can fruit in any high-humidity environment (85 to 92% RH at 59 to 70°F / 15 to 21°C). However, it needs daily misting and has a higher contamination risk. The Lykyn Smart Grow Chamber automates both.
Ready to start your first grow? Pair this block with the Lykyn Single-Tier Smart Grow Chamber and harvest your first flush in under two weeks.
Black Oyster Grow Kit - 5 lbs
PAIRS PERFECTLYThe forgiving species the chamber makes effortless
Black Oyster is the most beginner-proof species we ship - it tolerates drift in humidity and temperature better than any other variety. Pair it with the Lykyn Smart Grow Chamber and the chamber removes the drift entirely. Reusable across 100+ grow cycles and all 28 species.
- Auto humidity at 85 to 92% RH, no daily misting
- Fresh air keeps clusters clean and dark
- Black Oyster preset built in, runs even if Wi-Fi drops
- Reusable across 100+ grow cycles and all 28 species
What Our Customers Are Saying
Real reviews from real mushroom growers, beginners and pros alike.
"I LOVE my Lykyn! It's sitting on my kitchen counter and has become a conversation starter. My friends can't believe I'm actually growing mushrooms!"
"My kids are absolutely obsessed with watching the mushrooms grow in our LYKYN chamber. They check it every morning and get so excited when they see changes. It's become an unexpected family activity!"
"Really impressed with how well this controls humidity. My oyster mushrooms are forming beautiful clusters with none of the elongated stems I used to get with my grow blocks."
"I've been growing mushrooms for years and this is my new favorite grow box. The app works great. No more spraying and fanning :)"
"I wanted to wait until I harvested my first batch of mushrooms. This thing works as advertised. I had amazing results on my first try!"
Successful Harvest = Best Value
A $30 spray-and-grow bag wins on day one. A Lykyn smart grow box wins every month after that. Honest side-by-side.
| Feature | Manual Kit ($30) | Lykyn ($299 + blocks) |
|---|---|---|
| Daily attention required | 15 to 30 minutes | 30 seconds |
| Humidity control | Manual | Sensor-driven |
| Airflow control | Manual | Automatic cycles |
| Beginner success rate | 40 to 60% | 90%+ |
| Species variety | 1 per kit | Any fruiting block |
| Reusable | Single use | 100+ grow cycles |
| App notifications | ||
| Travel-friendly |
Manual kits cost less upfront, but you buy a new one each time. With Lykyn, you invest once and every harvest after is half the cost.