How Fast Can a Mushroom Grow? February 09, 2016 13:09

How fast do mushrooms actually grow when cultivated from home? Here are some thoughts and observations.
Working with mushrooms and learning to grow them is a side hobby of mine. A lot of people think this is pretty neat in concept, but I'm often asked how valuable it actually is to grow mushrooms to eat. Many people ask, "but how fast will they grow?".

For me, the answer isn't a simple. I'm usually growing different mushrooms on different food sources (substrates) and in different environments with different temperatures (outside, inside, on my counter - in my closet). For the mycelium to eat enough food and gain enough energy to fruit it's mushrooms with enough space to grow out, there are a lot of factors to consider.

But let's get to the point, how fast do the mushrooms grow? Last week, I bought a bag of Scott Henderson's oyster mushroom spawn that was on sale and on the verge of fruiting. I finally had the great idea to document the process and so I can demonstrate how fast these oyster mushrooms really do grow.

Here are the results:

Oyster Mushrooms Jan 30 evening
After about 2 days of the spawn chilling out in my room, identifiable mushrooms are clearly forming. The caps are little round convex bulbs and quite dark. - This is the morning of Sunday, January 31, 2016. 

Morning of January 31st
In the evening the same day - Sunday, January 31, 2016. The mushroom caps have already indented, and are becoming slightly concave.

The morning after caps are developing into the renown oyster shell shape - Feb 1st, 2016
The next morning, the caps are developing into their renown oyster shell shape - Feb 1st, 2016.

Evening Feb 1st
Check out how tall they are becoming in relation to the top of the bag! The stalks are getting thicker, and the color of the caps are a little lighter. - Evening of Feb 1st.

Oyster Mushrooms on Groundhog's Day! Morning Feb 2nd 2016
It's Groundhog's Day! Gills are more developed and are much more easy to recognize. Meaningwhile, the caps have gotten big! Also, check out tall they've gotten overnight - they are now as tall as the top of the bag. - Morning of Feb 2nd, 2016.

Feb 2nd before bed
Before bed the same night, the mushrooms had grown a couple inches above the top of the bag. - Night of Feb. 2nd, 2016

Morning of February 3
Morning of February 3rd, the caps are huge and definitely the perfect time to eat them. I pulled down the bag in the second shot to allow space for the lower mushrooms to grow and I can trust the upper mushrooms will protect the mycelium below.

So this is it, the growth of some oyster mushrooms over the course of three days.
 
by Kelsey Cham Corbett
February 9th, 2016