King Oyster (King Trumpet): what do the growing supplies cost?
King Oyster (King Trumpet) supplies are sold in 4 product categories (grow kits & fruiting blocks, grain spawn, liquid culture, agar & lab) across 2 US vendors — 16 listings tracked, 15 in stock, updated July 20, 2026. Prices below are grouped by category because a grow kit, a bag of spawn and a culture syringe are different products; comparing them against each other would be misleading.
Grow kits & fruiting blocks
| Vendor | Listing | Per kit | Listing price | Stock | |
|---|---|---|---|---|---|
| North Spore | Black King Oyster 'Plant & Grow' Mushroom Starter Block — 8-Pack (8 kits) | $18.00 | $144.00 | in stock | view → |
Price history — grow kits & fruiting blocks (daily median)
This chart is just getting started — we add a new point every day, so check back as the history builds.
Grain spawn
| Vendor | Listing | Per bag | Listing price | Stock | |
|---|---|---|---|---|---|
| North Spore | Organic King Trumpet Mushroom Grain Spawn | $29.99 | $29.99 | in stock | view → |
Price history — grain spawn (daily median)
This chart is just getting started — we add a new point every day, so check back as the history builds.
Liquid culture
| Vendor | Listing | Per syringe | Listing price | Stock | |
|---|---|---|---|---|---|
| Out-Grow | King Oyster Mushroom (Pleurotus eryngii) Liquid Culture Syringe | $12.36 | $12.36 | in stock | view → |
| North Spore | Organic King Trumpet Mushroom Liquid Culture Syringe | $19.99 | $19.99 | in stock | view → |
Price history — liquid culture (daily median)
This chart is just getting started — we add a new point every day, so check back as the history builds.
Agar & lab
| Vendor | Listing | Per plate | Listing price | Stock | |
|---|---|---|---|---|---|
| Out-Grow | King Oyster Mushroom (Pleurotus eryngii) Mushroom Plate Culture | $25.70 | $25.70 | in stock | view → |
| North Spore | King Trumpet Mushroom Plate Culture — NSPE1 - Stephen King Trumpet (Pleurotus eryngii) | $74.99 | $74.99 | in stock | view → |
Price history — agar & lab (daily median)
This chart is just getting started — we add a new point every day, so check back as the history builds.
We check King Oyster (King Trumpet) supply prices at every vendor we track, every day. How the index works · All categories · All tracked species