CHAPTER 25 



PRIMROSE {Primula sinensis') 



Cultural Considerations. Young seedlings are 

 greatly injured if the compost contains unrotted 

 manure. "When the plants begin to grow rapidly 

 a little bone meal may be worked into the soil. 

 During the blossoming period a little weak liquid 

 manure may be given, but only when the leaves are 

 pale. In transplanting, the crown of the plant 

 should not be planted too deeply in the soil lest it 

 rot. Neither should it be planted too high lest it 

 fall over. After transplanting primroses need 

 shade. Later, however, they should be given the 

 benefit of full light and ventilation. The soil 

 should never be allowed to become dry. 



Diseases or the Primrose 

 Primroses are subject to several serious diseases. 



Spot Decay 



Caused by Sclera tinia fuckeliana (De By.) Fckl. 



Symptoms. The conidial stage, Botrytis vulgaris, 

 of this fungus causes a spot decay on the foliage 

 (fig. 63, a.). The fungus often thrives on old 



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