MushroomPriceIndex

Black King Oyster: what do the growing supplies cost?

Black King Oyster supplies are sold in 3 product categories (grow kits & fruiting blocks, grain spawn, liquid culture) across 1 US vendors — 6 listings tracked, 6 in stock, updated September 17, 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

Cheapest today
$18.00/kit
Median
$22.59/kit
Highest today
$29.99/kit
In stock now
4
VendorListing Per kitListing price Stock
North Spore Organic Black King Mushroom Grow Kit Fruiting Block — 8-Pack (8 kits) $18.00 $144.00 in stock view →

Price history — grow kits & fruiting blocks (daily median)

$22.23$24.79$27.35Jul 20: $24.00Jul 21: $24.00Jul 22: $24.00Jul 23: $22.59Jul 24: $22.59Jul 25: $22.59Jul 26: $24.00Jul 27: $24.00Jul 28: $24.00Jul 29: $24.00Jul 30: $24.00Jul 31: $24.00Aug 1: $24.00Aug 2: $26.99Aug 3: $24.00Aug 4: $24.00Aug 5: $24.00Aug 7: $24.00Aug 8: $24.00Aug 9: $24.00Aug 10: $26.99Aug 11: $24.00Aug 12: $24.00Aug 13: $24.00Aug 14: $24.00Aug 15: $24.00Aug 16: $24.00Aug 17: $24.00Aug 18: $24.00Aug 19: $24.00Aug 20: $24.00Aug 21: $24.00Aug 22: $24.00Aug 23: $24.00Aug 24: $24.00Aug 25: $24.00Aug 26: $24.00Aug 27: $24.00Aug 28: $24.00Aug 29: $24.00Aug 30: $24.00Aug 31: $24.00Sep 1: $22.59Sep 2: $22.59Sep 3: $22.59Sep 4: $22.59Sep 5: $22.59Sep 6: $22.59Sep 7: $22.59Sep 8: $22.59Sep 9: $22.59Sep 10: $22.59Sep 11: $22.59Sep 12: $22.59Sep 13: $22.59Sep 14: $22.59Sep 15: $22.59Sep 16: $22.59Sep 17: $22.59Jul 20Sep 17

Grain spawn

Cheapest today
$29.99/bag
Median
$29.99/bag
Highest today
$29.99/bag
In stock now
1
VendorListing Per bagListing price Stock
North Spore Organic Black King Mushroom Grain Spawn $29.99 $29.99 in stock view →

Price history — grain spawn (daily median)

$28.49$29.99$31.49Jul 20: $29.99Jul 21: $29.99Jul 22: $29.99Jul 23: $29.99Jul 24: $29.99Jul 25: $29.99Jul 26: $29.99Jul 27: $29.99Jul 28: $29.99Jul 29: $29.99Jul 30: $29.99Jul 31: $29.99Aug 1: $29.99Aug 2: $29.99Aug 3: $29.99Aug 4: $29.99Aug 5: $29.99Aug 7: $29.99Aug 8: $29.99Aug 9: $29.99Aug 10: $29.99Aug 11: $29.99Aug 12: $29.99Aug 13: $29.99Aug 14: $29.99Aug 15: $29.99Aug 16: $29.99Aug 17: $29.99Aug 18: $29.99Aug 19: $29.99Aug 20: $29.99Aug 21: $29.99Aug 22: $29.99Aug 23: $29.99Aug 24: $29.99Aug 25: $29.99Aug 26: $29.99Aug 27: $29.99Aug 28: $29.99Aug 29: $29.99Aug 30: $29.99Aug 31: $29.99Sep 1: $29.99Sep 2: $29.99Sep 3: $29.99Sep 4: $29.99Sep 5: $29.99Sep 6: $29.99Sep 7: $29.99Sep 8: $29.99Sep 9: $29.99Sep 10: $29.99Sep 11: $29.99Sep 12: $29.99Sep 13: $29.99Sep 14: $29.99Sep 15: $29.99Sep 16: $29.99Sep 17: $29.99Jul 20Sep 17

Liquid culture

Cheapest today
$19.99/syringe
Median
$19.99/syringe
Highest today
$19.99/syringe
In stock now
1
VendorListing Per syringeListing price Stock
North Spore Organic Black King Mushroom Liquid Culture Syringe $19.99 $19.99 in stock view →

Price history — liquid culture (daily median)

$18.99$19.99$20.99Jul 20: $19.99Jul 21: $19.99Jul 22: $19.99Jul 23: $19.99Jul 24: $19.99Jul 25: $19.99Jul 26: $19.99Jul 27: $19.99Jul 28: $19.99Jul 29: $19.99Jul 30: $19.99Jul 31: $19.99Aug 1: $19.99Aug 2: $19.99Aug 3: $19.99Aug 4: $19.99Aug 5: $19.99Aug 7: $19.99Aug 8: $19.99Aug 9: $19.99Aug 10: $19.99Aug 11: $19.99Aug 12: $19.99Aug 13: $19.99Aug 14: $19.99Aug 15: $19.99Aug 16: $19.99Aug 17: $19.99Aug 18: $19.99Aug 19: $19.99Aug 20: $19.99Aug 21: $19.99Aug 22: $19.99Aug 23: $19.99Aug 24: $19.99Aug 25: $19.99Aug 26: $19.99Aug 27: $19.99Aug 28: $19.99Aug 29: $19.99Aug 30: $19.99Aug 31: $19.99Sep 1: $19.99Sep 2: $19.99Sep 3: $19.99Sep 4: $19.99Sep 5: $19.99Sep 6: $19.99Sep 7: $19.99Sep 8: $19.99Sep 9: $19.99Sep 10: $19.99Sep 11: $19.99Sep 12: $19.99Sep 13: $19.99Sep 14: $19.99Sep 15: $19.99Sep 16: $19.99Sep 17: $19.99Jul 20Sep 17

We check Black King Oyster supply prices at every vendor we track, every day. How the index works · All categories · All tracked species