366 HISTORY OF THE ROYAL BOTANIC GARDEN. 
the house in May, and by the middle ot June the whole that is 
intended to be removed for the season. At whatever time they are 
taking care to keep them at a sufficient distance from each other so 
as not to be in any way crowded together. Let them be plunged 
in the ground from two to six inches deep, according to the size of 
have seen no injurious effects arise from it. Besides, the saving of 
labour in watering is far more than over-balanced by the time that 
until the thermometer falls more than 8 deg. below freezing- f 
would not, however, advise this to be practised in spring, in case 0 
the same degree of frost happening at that time ; for we have often 
mild weather in February and March, and so much sun, that the 
heaths are forced into a more vigorous state of growth than they 
