CHAP. XI.] 
HEATHS. 
359 
when they are repotted in rich soil for 
flowering. Some gardeners throw away the 
old plants as soon as they have made the 
cuttings; but others take the old plants out 
of their pots, and shaking the earth from 
them, prune the roots, and repot the plants 
in smaller pots. Pelargoniums require a 
great deal of air; and when about to flower 
they should have a great deal of water, but 
at other seasons very little. They are killed 
with the slightest frost; and are very liable 
to damp off, if watered too much, and not 
allowed sufficient air in winter. Air is, in¬ 
deed, quite essential to them. 
Heaths .—The kinds grown in green-houses 
are all natives of the Cape of Good Hope, 
and they are very numerous; but they may 
be classed under six heads, which are named 
from the shape of their flowers. These 
divisions are tubular-shaped, ventricose, 
spreading or salver shaped, with an inflated 
calyx, globular, and ovate. They all re¬ 
quire to be potted high, and to be grown 
in three parts of peat earth to one of fine 
white sand, or in what is emphatically called 
heath mould. The fine hair-like roots of 
