06/01/2026
Selective isolation and propagation of a desirable strain in four pictures.
You start with your mushrooms . In this case, Black Pearl oysters grown in the house. Pick the biggest, most promising fruit when harvesting. Take a small sample of the mycelium from the heart of the mushroom, usually in the stem near the bottom where it’s nice and fluffy. Put that sample on agar and let it grow. Watch how it develops and make sure it’s healthy.
Once it looks strong, transfer it to grain. From there, you have a healthy convoy of spawn ready for substrate. This is how you carry on the best genetics and build strength in your cultivation.