MushroomPriceIndex

Paddy Straw: what do the growing supplies cost?

Paddy Straw supplies are sold in 3 product categories (liquid culture, agar & lab, substrate & amendments) across 1 US vendors — 3 listings tracked, 3 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.

Liquid culture

Cheapest today
$10.82/syringe
Median
$10.82/syringe
Highest today
$10.82/syringe
In stock now
1
VendorListing Per syringeListing price Stock
Out-Grow Paddy Straw (Volvariella Volvacea) Liquid Culture Syringe $10.82 $10.82 in stock view →

Price history — liquid culture (daily median)

$10.67$11.78$12.88Jul 20: $12.36Jul 21: $12.36Jul 22: $12.36Jul 23: $12.36Jul 24: $12.36Jul 25: $12.36Jul 26: $12.36Jul 27: $12.36Jul 28: $12.36Jul 29: $12.36Jul 30: $12.36Jul 31: $12.36Aug 1: $12.36Aug 2: $12.36Aug 3: $12.36Aug 4: $12.36Aug 5: $12.36Aug 7: $12.36Aug 8: $12.36Aug 9: $12.36Aug 10: $12.36Aug 11: $12.36Aug 12: $12.36Aug 13: $12.36Aug 14: $12.36Aug 15: $12.36Aug 16: $12.36Aug 17: $12.73Aug 18: $12.73Aug 19: $12.73Aug 20: $12.73Aug 21: $12.73Aug 22: $12.73Aug 23: $12.73Aug 24: $12.73Aug 25: $12.73Aug 26: $12.73Aug 27: $12.73Aug 28: $12.73Aug 29: $12.73Aug 30: $12.73Aug 31: $12.73Sep 1: $12.73Sep 2: $12.73Sep 3: $12.73Sep 4: $12.73Sep 5: $12.73Sep 6: $12.73Sep 7: $10.82Sep 8: $10.82Sep 9: $10.82Sep 10: $10.82Sep 11: $10.82Sep 12: $10.82Sep 13: $10.82Sep 14: $10.82Sep 15: $10.82Sep 16: $10.82Sep 17: $10.82Jul 20Sep 17

Agar & lab

Cheapest today
$26.47/plate
Median
$26.47/plate
Highest today
$26.47/plate
In stock now
1
VendorListing Per plateListing price Stock
Out-Grow Paddy Straw (Volvariella Volvacea) Mushroom Plate Culture $26.47 $26.47 in stock view →

Price history — agar & lab (daily median)

$25.64$26.09$26.53Jul 20: $25.70Jul 21: $25.70Jul 22: $25.70Jul 23: $25.70Jul 24: $25.70Jul 25: $25.70Jul 26: $25.70Jul 27: $25.70Jul 28: $25.70Jul 29: $25.70Jul 30: $25.70Jul 31: $25.70Aug 1: $25.70Aug 2: $25.70Aug 3: $25.70Aug 4: $25.70Aug 5: $25.70Aug 7: $25.70Aug 8: $25.70Aug 9: $25.70Aug 10: $25.70Aug 11: $25.70Aug 12: $25.70Aug 13: $25.70Aug 14: $25.70Aug 15: $25.70Aug 16: $25.70Aug 17: $25.70Aug 18: $26.47Aug 19: $26.47Aug 20: $26.47Aug 21: $26.47Aug 22: $26.47Aug 23: $26.47Aug 24: $26.47Aug 25: $26.47Aug 26: $26.47Aug 27: $26.47Aug 28: $26.47Aug 29: $26.47Aug 30: $26.47Aug 31: $26.47Sep 1: $26.47Sep 2: $26.47Sep 3: $26.47Sep 4: $26.47Sep 5: $26.47Sep 6: $26.47Sep 7: $26.47Sep 8: $26.47Sep 9: $26.47Sep 10: $26.47Sep 11: $26.47Sep 12: $26.47Sep 13: $26.47Sep 14: $26.47Sep 15: $26.47Sep 16: $26.47Sep 17: $26.47Jul 20Sep 17

Substrate & amendments

Cheapest today
$16.96/bag
Median
$16.96/bag
Highest today
$16.96/bag
In stock now
1
VendorListing Per bagListing price Stock
Out-Grow 50/50 Horse Manure and Straw Mushroom Substrate (5lb Bag) $16.96 $16.96 in stock view →

Price history — substrate & amendments (daily median)

$16.71$18.54$20.36Jul 20: $19.52Jul 21: $19.52Jul 22: $19.52Jul 23: $19.52Jul 24: $19.52Jul 25: $19.52Jul 26: $19.52Jul 27: $19.52Jul 28: $19.52Jul 29: $19.52Jul 30: $19.52Jul 31: $19.52Aug 1: $19.52Aug 2: $19.52Aug 3: $19.52Aug 4: $19.52Aug 5: $19.52Aug 7: $19.52Aug 8: $19.52Aug 9: $19.52Aug 10: $19.52Aug 11: $19.52Aug 12: $19.52Aug 13: $19.52Aug 14: $19.52Aug 15: $19.52Aug 16: $19.52Aug 17: $20.11Aug 18: $20.11Aug 19: $19.95Aug 20: $19.95Aug 21: $19.95Aug 22: $19.95Aug 23: $19.95Aug 24: $19.95Aug 25: $19.95Aug 26: $19.95Aug 27: $19.95Aug 28: $19.95Aug 29: $19.95Aug 30: $19.95Aug 31: $19.95Sep 1: $19.95Sep 2: $19.95Sep 3: $19.95Sep 4: $19.95Sep 5: $19.95Sep 6: $19.95Sep 7: $16.96Sep 8: $16.96Sep 9: $16.96Sep 10: $16.96Sep 11: $16.96Sep 12: $16.96Sep 13: $16.96Sep 14: $16.96Sep 15: $16.96Sep 16: $16.96Sep 17: $16.96Jul 20Sep 17

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