Originally published in the Oct. 2, 2013, issue
When
garden centers receive their shipments of bulbs in the fall, I look them over
and wish I had room to try every kind. Among the bulbs (and, technically,
corms) that you may find now at Georgia garden centers are daffodils, jonquils,
tulips, crocuses, Dutch hyacinths, Roman hyacinths, grape hyacinths,
colchicums, snowdrops, snowflakes, alliums, triteleias, scillas, ipheions,
Dutch irises, anemones, camassias and Spanish bluebells. If you’ve never heard
of some of these, don’t let that hold you back from giving them a try!
Spanish bluebells |
When purchasing
bulbs, avoid the ones that are soft or that have become dried out and brittle.
Autumn-flowering bulbs should be planted immediately. Wait until after Oct. 15
to plant spring-blooming ones, however. Keep them in the vegetable crisper
until ready to plant, but do not store them with fruit. The fruit emits a gas
that is detrimental to the bulbs.
As a
general rule, fall-planted bulbs prefer well-drained soil. Clay soil can be
amended by digging in organic matter such as ground pine bark mulch. Throwing a
shovel of sand into a hole isn’t enough to help. If you want to use sand to
amend red clay, you need to add enough sand so that it makes up at least 50
percent of the volume of the amended bed.
A good
rule of thumb is that bulbs should be planted at a depth of 1.5 times the
diameter of the bulb. An exception is the tulip, which should be planted six
inches deep in very well-drained soil. Plant the pointed end up and the fatter,
rounded end down. If you are unsure about which end goes up, ask a garden
center employee.
Most
bulbs benefit from fertilizing at planting. Work the fertilizer beneath the
bulbs, but don’t set the bulbs directly down on top of a handful of fertilizer.
Bulb Booster is a slow-release fertilizer developed specifically for bulbs and is
a top-of-the-line choice. Bone meal, the traditional fertilizer for bulbs, is
still OK, but is not a complete fertilizer. Most brands now lack the nitrogen
they once had. If you are using bone meal, you need to add supplemental
nitrogen.
A
horticulturist at your garden center can help you with your bulb choices and
answer your questions. And don’t forget to check out the ads in the “Flowers
for Sale” category in the Market Bulletin
– you can sometimes find some interesting bulbs there.
Arty Schronce is the Department’s
resident gardening expert. He’s a lifelong gardener and a horticulture graduate
of North Carolina State University who encourages everyone to discover the
pleasures of plants and gardening.