If ic is seemingly impossible to fit a rock 
—_ 
meses. — RETAINING WALL — | ee 
i garden into the existing landscape on small 
plots, as in some heavily populated suburban 
ean areas, it is still possible to enjoy the delight- 
insert wedge stone under callar of plant 
ful flower and foliage effect of many tiny 
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alpines in an easily constructed wall garden. 
Here of course, your selection of plants will 
be somewhat limited, but nevertheless there 
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is still a long list of plants that are perfectly 
adaptable to this type of culture and some 

that will not thrive anywhere else. With 
careful selection and planned planting you can have flowers all Summer long 
and ornamental foliage plants all through the year with the evergreen species. 
Inside the back cover of this book there is a partial list of plants that will 
thrive in dry walls. If you want to build a beautiful living wall, build it accord- 
ing to the accompanying sketch, slanting each stone toward the center. Instead 
of using cement to hold it together, use a compost of two-thirds sandy loam 
and one-third leafmold, with a handful of dry sheep or cow manure or bone 
meal to each pail of compots. Be sure the greatest portion of the wall contains 
neutral to alkaline soil, necessary for most rock plants. Use the compost dry 
and fill in between stones as you would with concrete. 
The dimensions given for width are minimum sizes and the wall may be 
made thicker if so desired. The thicker the better, but too thick and it will be 
a mesa and not a wall. A slant of two inches to a foot of height 1s enough to 
catch rain. Use rough, flat stones if possible-—sandstone is the best medium, 
as it retains moisture longer. 
