So far as practicable, the soil should be renewed every year, by turning
in vegetable mould, river sand, and well rotted manure to the depth of
about a foot; and every second or third year the perennials should be
taken up, and reduced, when a greater proportion of manure may be added,
or what is yet better, the whole of the old earth removed, and new mould
substituted.
It used to be supposed that the only time for sowing annuals or other
plants, (in Bengal) is the beginning of the cold weather, but although
this is the case with a great number of this class of plants, it is a
popular error to think it applies to all, since there are many that grow
more luxuriantly if sown at other periods. The Pink, for instance, may
be sown at any time, Sweet William thrives best if sown in March or
April, the variegated and light colored Larkspurs should not be put in
until December, the Dahlia germinates most successfully in the rains,
and the beautiful class of Zinnias are never seen to perfection unless
sown in June.
This is the more deserving of attention, as it holds out the prospect of
maintaining our Indian flower gardens, in life and beauty, throughout
the whole year, instead of during the confined period hitherto
attempted.
The several classes of flowering plants are divided into PERENNIAL,
BIENNIAL, and ANNUAL.