It's onion time! The big farms of south Texas shipped out their seedlings
this week - and gardeners have plenty of different onion sets to choose
from.
At the nursery I am often asked how to go about growing a good crop
of onions. The secret really is in the timing. Because our summers are
so warm, we have to choose short-day onions. (Folks up north plant
long-day onions.)
These short-day onions are planted during the ‘short days’ of fall and winter,
and start the bulbing process when the length of the day reaches 10 to 12
hours. They mature in 110 to 120 days.
Onions planted in the fall have a longer time to grow than those planted in
winter or early spring. Simply stated - the earlier you plant them, the
larger the onion. Here are some tried and true varieties for our central
Texas region:
Texas 1015y A super sweet, globe-shaped yellow onion that can
reach a 6 inch diameter. This is the favorite onion of Texas. 1015 means
10 month, 15th day. This is the date they should be planted from seed.
The ‘Y’ means – yellow, the color of the onion.
Contessa A white, globe shaped onion. Not as sweet as 1015 but still
on the sweet side. Mature size - 5 inches.
Yellow Granex A semi-flat, yellow, sweet onion that can grow to a
mature width of 5 inches. This is the Vidalia onion of Georgia.
Bermuda This is an heirloom variety brought from the Canary Islands to
south Texas in the late 1800s. Bermuda is white, sweet, and its shape is flat.
Grows to 3 to 4 inches in diameter. This variety makes great ‘green’ onions
when harvested early.
Southern Belle Red A sweet, red, globe shaped onion that matures to 4
inches. Onions need lots of sunshine and good drainage. Adding compost
will loosen compact soils and add beneficial amendments to the soil.
Onion seedlings (sets) should be planted 1 inch deep and 4 to 5 inches
apart. If you want to harvest green onions, plant 2 inches apart and harvest
every other onion, leaving some to grow to maturity. Be sure to water in
your onions after planting. This will keep them from drying out and give
them a good start.
Happy gardening everyone!
[© Chris Winslow 2010]