hirds filled with crocks, then filled up with fibrous
peat and sphagnum moss. During winter only a very little moisture
should be given.

Oenothera.--The Evening Primroses are most useful and beautiful
plants, well suited for ornamenting borders, beds, edgings, or
rock-work. All the species are free-flowering, and grow well in any
good, rich soil. The annual and biennial kinds are sown in the open
in spring. The perennials may be increased by dividing the roots, by
cuttings, or by seed, the plants from which will flower the first
season if sown early in spring. They bloom in June and July. Height, 6
in. to 4 ft.

Olearia.--These evergreen shrubs thrive in peat and loam, and may be
increased by division of the roots. O. Haastii has foliage resembling
the Box, and a profusion of white, sweet-scented flowers in summer: a
chalk soil suits it admirably. Height, 3 ft. to 4 ft.

Omphalodes Verna.--A hardy perennial which may be grown under the
shade of trees in ordinary soil. It produces its flowers in March, and
is increased by dividing the roots in autumn. Height, 6 in.

Oncidium Sarcodes.--Plant these Orchids firmly in well-drained pots,
using equal parts of live sphagnum and fibrous peat. Give one good
watering as soon as the potting is finished, and stand them in a
light, warm part of the greenhouse. They will require very little more
water until the roots have taken hold of the soil--only sufficient to
keep the pseudo-bulbs from shrivelling--and during the winter months
scarcely any moisture is needed. They flower in August. Height, 1-1/2
ft.

Onions.--Require a deep, rich, heavy soil. Where the ground is not
suitable it should have had a good dressing of rotten manure the
previous autumn, and left in ridges during the winter. Level the
ground, and make it very firm just before the time of sowing. The seed
should be sown early in March for the main crop and for salad and
pickling Onions, and in August for summer use. Thin out to about 6
in. apart, excepting those intended to be gathered while small. The
Tripoli varieties attain a large size if transplanted in the spring.
The Silver-skins do best on a poor soil. For exhibition Onions sow in
boxes early in February in a greenhouse; when about 1 in. high prick
out, 3 in. apart, into other boxes; give gentle heat and plenty of
air, and when they have grown 6 in. high put them in a cool frame
until the middle of April, when they must be planted in the open, 1
ft. apart