TIMES FOR PLANTING 99 



TIMES FOR PLANTING CERTAIN VEGETABLES IN VALLEY AND FOOTHILL 

 REGIONS OF CENTRAL AND NORTHERN CALIFORNIA. 



Beans 



Beets 



Cabbage . . , 

 Carrots . . . 

 Cauliflower 



Celery 



Corn. . , 



II i i i a ill ! ! 1 



* * 



* * * * * * 



* * * * * * 

 * * * 



* 



Cucumbers 



Eggplant " 



Lettuce * * * * * * * * * * 



Melons * * 



Onions .. * * * * * * * * * 



Peas.. ******** 



* 



* 



Potatoes, Sweet * * * * 



Radishes * * * * * * * * * * * * 



Salsify * * * * .... 



Spinach * * * 



Squash * * * * 



Tomatoes ] * * * 



Turnips * * .. * * .. * * * * * * 



THE FROST FACTOR. 



The intrusion of the frost period is a local limitation of the 

 planting season. Each vegetable grower should keep records of 

 frost occurrence for his own guidance in future operations and for 

 the public benefit, for the government weather service is very 

 anxious to get local observations on this point. 



During the last decade the San Francisco office of the United 

 States Weather Bureau has given particular attention to frost 

 phenomena, including conditions of occurrence and prevention, and 

 the publications by the Bureau comprise the best knowledge on the 

 subject. 



The discussion in the chapter on California Climate as Related 

 to Vegetable Growing shows that weather conditions are every- 

 where dependent to a degree on local topography and environment, 

 even though there are regional characters which must be under- 

 stood. In this place it is fitting to emphasize especially the dates 

 at which killing frosts have occurred in a large number of localities, 

 because such dates are seldom accurately remembered even in the 

 localities concerned. The table which we have compiled and ar- 

 ranged in our own way, according to districts, from data kindly 

 furnished by the Weather Bureau, should be studied with the fol- 

 lowing points in view : 



4 On irrigated or naturally moist low land. 



