POTTING 33 
plants the stronger ones should always be placed in the centre, 
first of all. ‘Then a circle or two of flowering and foliage- 
plants with trailing vines to hang gracefully over the rim. 
The room between the clumps should be filled in with good 
soil and firmly packed without disturbing the roots. 
Window-boxes before planting should be lined with zinc to 
prevent the wood from rotting. The edges should be coy- 
ered with low trailing plants. No drainage is needed, as the 
box will be exposed to wind and sun and consequently dries 
quickly. 
