114 
FOR THE 
F LOWE RS 
THAT GROW 
IN HEAT 
Cold-jrames derive their stim¬ 
ulating warmth from the 
sun’s rays. Young plants 
started in the house are 
moved to them for “harden¬ 
ing off” preparatory to setting 
in the open garden 
The small greenhouse can 
often be built-on if its archi¬ 
tectural treatment conforms 
with that of the dwelling. 
In such cases it is heated by 
an extension of the regular 
house system 
The lean-to above is 
built against a con¬ 
crete wall. It is 
partly sunken and 
faces the south, to 
catch and hold the 
maximum amount of 
sun warmth 
A regidar greenhouse, 
even though small, 
can be adapted to 
growing any kind of 
hothouse plant. This 
is a “unit” house and 
can be added to if 
more space is desired 
