WHERE TO GROW MUSHROOMS 



the extremes of temperature during the 

 winter are not so great as to prohibit cul- 

 ture in modified hot beds or cold frames. 

 Simple culture frames of the usual type are 

 employed, except that no glass is used, and 

 they are covered with sheet iron or boards, 

 upon which finally a layer of straw is placed, 

 if necessary. Fresh manure may be used 

 under the compost, if it seems desirable to 

 force somewhat the early growth of the 

 spawn. This form of culture is often very 

 successful. Properly speaking, however, 

 this is not open air culture. 



Open air culture for mushrooms cannot 

 be regarded as having great possibilities of 

 success in most regions. There are many 

 difficulties suggested by the fact that com- 

 mercial mushroom growing demands a 

 more or less uniform temperature. The 

 variation in daily temperature is usually 

 considerable, drying winds are not infre- 

 quent, and at best, it is difficult to regulate 

 the moisture factor. In Southern England 

 I have seen successful open air beds during 



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