DETAILS OF SUMMER GARDENING 157 



from a single crown, as, for instance, to the double 

 Daisies, which need to be divided and replanted every 

 year, especially in light soils, if they are not to de- 

 teriorate quickly, and to the delicate little Morisia 

 hypogsea, one of the best early-flowering plants for 

 the rock garden, and one which many gardeners com- 

 plain that they cannot keep long in health. The 

 reason usually is that they are afraid to disturb it, 

 since it is a deep-rooting plant. They therefore allow 

 it to form a number of crowns, which it does very 

 quickly, and which crowd each other in a narrow in- 

 terstice between the rocks, with the result that it 

 grows feebler every year. It should be taken up as 

 soon as it has gone out of flower, and after all the 

 crowns have been carefully divided they should be 

 planted separately in cool places between the rocks 

 and in fresh deep compost of loam and leaf mould. 

 There are many spring flowering plants which need 

 the same treatment especially in light or poor soil, 

 and the gardener can usually discover which they 

 are by observation. When he sees that a plant breaks 

 up into a number of crowns after a year or two and 

 begins to flower poorly, then he may be pretty sure 

 that the only possible remedy for its deterioration is 

 division. Division, of course, may kill the plant, 

 but it is always worth trying when the only alter- 

 native is deterioration. Aquilegia glandulosa and its 

 beautiful hybrid A. Stuartii are plants which often 

 die out or cease to flower after a year or two in the 

 south of England, and the only remedy for this is 



