diff --git a/README.mdown b/README.mdown
index ad34f1d..1ce3d1a 100644
--- a/README.mdown
+++ b/README.mdown
@@ -469,7 +469,12 @@ However, exposing more surface area give the mushrooms more room to sprout.
 - [ ] hygrometers
 
 Coconut husk (coir) as casing layer and flooring in our fruiting chamber to hold moisture better than the mycelium cake we created in the [grain spawn](#grain-spawn) jar.
-It can also be mixed in with [grain spawn](#grain-spawn) for colonization as a substrate when changing the recipie between generations.
+It can also be mixed in with [grain spawn](#grain-spawn) for colonization as a substrate when changing the recipe between generations.
+
+Many commercial gardening coir are treated with [endophyte](https://en.wikipedia.org/wiki/Endophyte) to protect plant roots.
+These endophytes do not protect our mushroom roots and will compete for resources like any other contamination.
+
+**Coconut coir must be [autoclaved](#autoclave) prior to use.**
 
 0. Open and invert a fully colonized [grain spawn](#grain-spawn) jar and firmly but gently tap the mycelium cake out.
 
@@ -479,17 +484,17 @@ It can also be mixed in with [grain spawn](#grain-spawn) for colonization as a s
 
 2. Soak the coconut coir brick by following the packaging instructions for 12 hours.
 
-    - Optionally, put hydrated coconut coir in mason jars and [autoclave](#autoclave) for 1 hour and cool to room temperature.
+3. Fill mason jars with the hydrated coconut coir and [autoclave](#autoclave) for 1 hour and cool to room temperature.
 
-3. Layer the bottom of the clear plastic tubs with 5 cm or more of coconut coir.
+4. Layer the bottom of the clear plastic tubs with 5 cm or more of coconut coir.
 
-4. Gently roll the mycelium cake in the hydrated coconut coir to form a light casing.
+5. Gently roll the mycelium cake in the hydrated coconut coir to form a light casing.
 
-5. Place the mycelium cake on the layer of coconut coir away from the sides of the tub.
+6. Place the mycelium cake on the layer of coconut coir away from the sides of the tub.
 
-6. Place a sanitary hygrometer onto the coconut coir layer where it is visible.
+7. Place a sanitary hygrometer onto the coconut coir layer where it is visible.
 
-7. Replace tub lid and store in ambient room light at room temperature.
+8. Replace tub lid and store in ambient room light at room temperature.
 
 ## Daily