Bulbs
Bulbs are brilliant for growing in pots
and boxes, here are some all time favorites:
Agapanthus or Blue Lily of the Nile.
Fleshy-rooted evergreen plant, with strap leaves, often grown
in tubs and urns on terraces and steps during the summer, when
the tall blue spikes unfold. Culture is easy, but plants
require a well-lighted, frost proof room or greenhouse in
winter.
This is an old-time favorite, often seen in gardens of
Europe.
Calla Lily. Showy, hardy outdoors in warmer
regions, but a tender pot plant in the North. Most familiar is
the white one with large, shiny, heart-shaped leaves. Start
bulbs indoors in February or March in rich soil and, when
weather settles, transfer to large pots and take outdoors.
Calla lilies do well in full sun or part shade, are heavy
feeders and need much water. There is also a dainty yellow with
white-spotted leaves. Rest bulbs after foliage ripens and grow
again.
Dahlias. Colorful and free-flowering, they
provide bounteous cut blooms. Tall, large-flowering kinds can
be grown only in large planters and boxes, but the dwarfs, even
freer flowering, are excellent in small containers.
Attaining one to two feet tall, they grow easily from tubers
in average soil in sun or part shade. They may also be raised
from seed sown indoors in February. If tubers are stored in
peat or sand in a cool, frost proof place, they can be grown
for years. Check bulbs during winter, and if shriveling,
sprinkle lightly.
Gladiolus. Summer-flowering with spear like
leaves and many hued spikes. Corms can be planted in containers
outdoors after danger of frost is passed. Set them six inches
apart and four to six inches deep. If several containers are
planted every two to three weeks, there will be a succession of
bloom.
Stake stems before flowers open. After the leaves turn
brown, or there is a frost, lift corms, cut off foliage and
dust with DDT to control thrips. Store corms in a dry place at
45 to 55 degrees F. Gloxinias. Summer-flowering and tender with
large, tubular blooms of red, pink, lavender, purple, or white,
and broad velvety rosettes of leaves. Start tubers indoors and
don't take outside until weather is warm. Since the leaves are
easily broken or injured by wind or rain, put plants in a
sheltered spot. The low broad eaves of contemporary houses,
with restricted sun, offer an appropriate setting for rows of
pots or window boxes filled with gay gloxinias.
Lilies. Gorgeous and hardy, with blooms in
many colors. It is now possible to have a lily container
garden, with flowers from May to frost. Open the season with
the dainty Lilium pumilum and continue with madonnas, Golden
Chalice hybrids, Olympic hybrids, auratums, and specios-ums.
Lilies can be planted in fall, like daffodils and tulips, and
they will also flower from bulbs set out in early spring. In
cold regions, the rules for Dutch bulbs outdoors in winter
apply also to lilies, which do well in large planters, two feet
wide and two feet deep. Group several of one variety for a good
effect. Plant smaller sizes in individual six or eight inch
pots to be wintered in cold frames. Plant larger sizes in eight
or ten inch pots. After flowering put containers out of sight
while stalks ripen.
Nurserymen and florists offer pot-grown lilies in early spring
ready to plant in containers without disturbance of roots. Try
combining several in large containers, with English ivy, vinca,
grape ivy, dwarf annuals, or other low plants for softening
effects. After flowering, bulbs can be planted in the garden,
grown again in containers or given to friends.
Tuberose. Tender and summer-flowering with
narrow foliage and tall spikes of single or double white
flowers, fragrant and long-lasting. Where seasons are short,
bulbs are best started indoors six to eight weeks before
planting outdoors. Plant in six-inch pots and feed with liquid
fertilizer. Tuberoses need a rich, well-drained soil and full
sun and staking of the tall spike. Since bulbs do not flower
well a second year start with fresh stock each spring.
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