Ina house having full exposure to the sun in winter, orchids 
will need shading to some extent. Even in a very small sreenhouse 
there exists plenty of opportunity for variations in shading, enough 
to suit individual plants by placing upon shelves or near the glass 
those which require much light, and putting those which require 
more shade on the less exposed side of the house. The observant 
grower will find even a slight change of position in the house will 
often bring about marked improvement in growing conditions for 
a plant. 
POERLING 
Species bloom at stated season, but the hybrids are of 
irregular habit, due perhaps to their mixed origin, they blossom 
and need repotting throughout the year. This makes it difficult to 
make a rule for potting, but the best time is after flowering or when 
they start to make their new collar roots. However, many orchids 
should not have their root action disturbed and should not be 
repotted each year. Three rules generally cover this: (1) when 
the compost decays, (2) when the plant does not thrive due to: 
faulty drainage, (3) or when they have outgrown their pots. 
New pots should be thoroughly soaked prior to using 
and old ones thoroughly cleaned. Using a five-inch pot as an ex- 
ample, increase the drainage hole to about one inch in diameter 
with the head of a hammer. Place a large piece of crock over this 

Scene in’ Riverview’s Work Room 
56 
