80 ROCK GARDENING FOR AMATEURS 



flow is not requisite, and that many aquatic plants can 

 be cultivated with absolute success without a flow of 

 water, many difficulties disappear. It is only required, 

 in fact, that the green scum shall be occasionally 

 removed from the pool, and that the loss of water caused 

 by evaporation and other agencies be made good. This 

 loss is very small, and would be even less were it not 

 that the birds find in the pool a source at which they 

 can quench their thirst and perform their ablutions. 

 Their presence really adds to the true interest of the 

 garden. We have cultivated Water Lilies for years in 

 pools and tubs without a continuous supply of water, 

 and have no hesitation in recommending others to 

 adopt this method. After the first week or so, there 

 is no offensive smell from the water. Not that the pool 

 or pond without an ample supply of water is to be pre- 

 ferred. It is only to meet the case of those who cannot 

 secure it that the above experience is given. 



The Ideal Water Garden in conjunction with rock- 

 work is fed by a streamlet appearing to issue from a 

 spring and flowing down a declivity leading to the pond 

 or pool. This streamlet supply may be purely artificial 

 and regulated by a tap that can be turned on and off 

 as required. It must be remembered that the lovely 

 Nymphaeas do not like running water, but prefer to be 

 in a placid pond, where the sun's rays can reach the water ; 

 there they will open more freely than in water cooled 

 by a constant influx. A pipe leading from the household 

 supply will provide all that is necessary, and this may be 



