60 Ferns and Fern Culture. 
When it is a mound or ridge raised on the level ground, 
holes may be dug down to the sand, filled with broken 
bricks, clinkers, or stones covered with sods, or other 
rough material, and the body of soil above. This will 
provide a ready means for all surplus moisture to pass 
away. If the fernery be sunk in the ground the water 
will drain to the lowest part, and there provision must 
be made for its disposal, either by enabling it to sink 
FERNERY IN Form or A Mounp. 
into the sand below, or by constructing a drain to carry 
it elsewhere. 
Sandstone is one of the best materials for rockwork. 
Its colour harmonises with the various tints of foliage, 
and all Ferns grow well in association with it. Thisstone 
is found in strata having a gentle dip in a given direc- 
tion, therefore when it is used the natural formation 
should be imitated. 
