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Our King Blue Oyster grow kit is a 5 lb block fully colonized with first-generation genetics from a Blue Oyster and King Oyster cross. It grows noticeably thicker, heavier fruits than a standard oyster kit while keeping the fast, forgiving growth that makes oysters easy.
Dense white stems you can slice into medallions and sear hard; they brown instead of collapsing.
Deeper flavor than standard oysters and a staple of plant-based cooking.
Fruits from 60 to 82°F and tolerates cooler rooms.
The hard parts of mushroom growing (sterilization, inoculation and colonization) are done before the block ships. Your job is to trigger fruiting and keep the surface from drying out.
Make one slit across the face of the block as shown in the instructions. Fresh air on the mycelium is the signal to stop feeding and start fruiting.
Lightly mist the cut face once or twice a day with the included mister. Keep the surface from drying out; don't leave standing water.
Give it about 12 hours of indirect light a day. Fresh air is what builds thick stems and broad caps instead of leggy growth.
Let the cluster size up fully and pick just before the cap edges flatten. Then stop misting for about a week before the next flush.
Patience builds the stems: King Blue rewards waiting more than most oysters. The last few days before harvest are when the stems put on the density that makes this variety worth growing. Pick just before the cap edges flatten.
Get more from your kitA Tabletop Humidity Tent holds moisture around the block so you mist less and get fuller clusters, especially in dry winter air. Ready to grow King Blue Oyster from scratch? Start with our King Blue Oyster liquid culture syringe.
Usually within the first week or two after cutting. Clusters then take several more days to size up; let them, since the extra time builds the thick stems.
No. The kit is designed to fruit in open room air with daily misting. In dry homes, especially in winter with forced-air heat, a humidity tent holds moisture around the block so you mist less often and get fuller clusters.
Most blocks give multiple flushes totaling 2.5–3 lb wet weight. Rest the block for about a week between flushes.
Not enough fresh air. In stale air the stems stretch while the caps stay small. Move the block somewhere with better circulation, or fan it a few times a day.
Indoors is strongly preferred. The block needs steady temperatures and protection from wind, direct sun and insects; fungus gnats find an exposed block quickly. A kitchen counter, bathroom shelf or any spot out of direct sunlight works well.
The kit is already colonized and ready to fruit, so there's no sterile work. Our King Blue Oyster liquid culture syringe is for growers who make their own grain spawn and want to scale up or run multiple grows.
Fast shipping, great packaging, beautiful mushrooms. I was happy with how quickly this kit fruited. Thank you so much for the great service and product! I absolutely will be ordering again.
You guys are awesome! These grow better than any other brand I have tried! Blue king Oyster's are the best tasting oyster ever! Simply amazing!
GIANT MUSHROOMS! rapid growth, very full healthy clusters. very satisfied.
My new favorite Mushroom! This grows much larger than the regular blue and has a better taste! No waiting like the King Oyster, it fruits amazingly fast!
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