How to Grow Sweet Corn
How to Grow Sweet Corn
Learning how to grow sweet corn is easier than you think
and you can reap the many rewards, such as having your own popping corn.
May 28, 2013
By Karin Eliasson
“Greens!” provides step-by-step principles of organic
gardening along with instructive and beautiful photographs. Experienced and
budding gardeners alike will find a source for inspiration in this handy
guide.
You can grow your own vegetables whether you own your own
home or live in an apartment. Author Karin Eliasson gives advice on growing
over 100 vegetables as well as how to use them in the kitchen. In this excerpt
taken from Greens! (Skyhorse Publishing, 2013) learn how to
grow sweet corn, from cultivating corn to harvesting it.
You can purchase this book at the MOTHER EARTH NEWS
store: Greens!.
Corn brings us to warmer shores and Mexican hats. But it is
very possible to grow corn in colder climates as well. It is even pretty easy,
as long as you keep in mind that corn needs a little extra warmth and shelter
from the wind to feel at home. In southern and middle Sweden they cultivate a
lot of sweet corn (Zea mays var. saccharata), which
is the most common corn to cultivate in the garden, but it’s also a food source
for animals.
Self-picking is also common. Even though I’ve started to
grow my own corn to secure a few well-filled plastic bags in the freezer, I can
still find charm in the large corn fields. I gladly take a stroll among the
tall plants now and then to experience the sensation of being lost. As a child,
I would keep an eye on my mother’s legs on the row next to mine, so that the
fear that I would never get out would decrease. The fields are intriguing.
Corn is definitely one of the growths I often place in the
children’s garden corner. Most children like corn, no matter if they’re large
corn cobs or cute mini kernels. Furthermore, the seeds are large and even small
children’s hands manage to stick them in the right place. Since the corn
preferably grows in large groups, you can play with the shapes when you set
them out and make wavy roads between the groups. The corn (Zea mays everta)
used for popcorn is especially exciting. Imagine growing your own popcorn! It
is a somewhat different corn cob than the ones we are used to eating, a smaller
and tightknit cob with tiny kernels. It needs a little more time to mature, so
if you don’t live in a more temperate climate you should grow them in a
greenhouse or start pre-cultivating early.
Since corn is one of the world’s most cultivated seeds,
there is obviously a whole sea of varieties. Cultivating in the North does,
however, set certain requirements that the corn cannot be too sensitive to cold
and that the fruit grow early and ripen fast. It is therefore best to keep to
the varieties that are already tested in your climate.
How to Grow Sweet Corn
Preparing the Growth Site
Corn is, as previously mentioned, dependent on warmth and
needs a little extra attention to reap a nice harvest in colder climates. Make
sure that it grows in a sheltered, sunny spot. The best way to secure warmth
around the root system is to make sure that the soil is well-drained, light, and
humus-rich. If the spring is particularly cold you can warm the soil with a
plastic cover before sowing or planting. Fertilize the soil with manure and
compost. The corn wants a lot of nutrients and water, and if you can cover
cultivate with organic material, that’s ideal. Corn likes to be
cross-fertilized. To sow the best corn possible, you should therefore keep to
one variety at a time. Choose your variety with care and keep to one variety
every year.
Sow
When? I always recommend pre-cultivating
corn to win time. In southern parts of Sweden, and warmer climates, you can sow
directly in the ground, but the soil temperature must be at least 60°F (15°C)
and when the plant has appeared, any risk of frost must be gone. If you
pre-cultivate, start four to five weeks before you plan to plant them outside,
and wait until there is no chance of frost.
How? The corn quickly develops a large
root system and should therefore be sown in deep root trainers. If you want to
save space you can first broadcast sow the seeds in trays and then replant them
when they are about 2 inches (5 cm) tall. Fill the trays with a blend of
planting soil and sifted soil. Push the seeds 1–2 inches (2–4 cm) deep and
makes sure that the soil is lightly packed. Water the soil properly. Let the
seeds germinate and the plants appear when the temperature is about 77°F
(25°C). Later you can lower the temperature somewhat when they start growing
properly.
When you sow directly in the ground, the easiest way is to
make a 2 inch (5 cm) deep trench in the soil and water it. Add the seeds, cover
with soil, and water everything again. The corn will pollinate better and get
more fruit if it grows in groups instead of rows. Make large circles or squares
and sow the corn with 8–10 inches (20–25 cm) distance between each plant in
every direction.
Planting Outside and Nurture
The plants are not moved outside until the risk of frost is
completely over. The hardening process is very important. Have fiber cloth at
hand in case there are surprising cold nights. Keep weeds away from the corn.
It doesn’t like competition and cover cultivating is preferred from this
perspective as well.
Support fertilize with stone meal or Algomin when it
blossoms. When the corn is about to pollinate, you can help them out by gently
shaking the plants a little so that the seed flour rains down on them.
Be extra vigilant with watering once the fruits have
appeared. Remove side sprouts that shoot out from the base of the plant. They
just steal energy, and they rarely turn into nice fruits. Let only two or three
corn cobs develop on each plant unless you are cultivating a mini-corn variety.
In those cases you can expect 10–15 cobs per plant. Upwards cup some dirt
against the stem when the plant is about 20 inches (50 cm) tall so that it gets
extra support around the base. Repeat as you go if needed.
Harvest
When? Regular corn is ready for harvest
at the end of summer. The threads at the top of the cob should be withered and
if you carefully peel back the leaves, a light pointed push against the corn
kernel should release a white corn juice. If the juice is transparent, the corn
is not ready. Mini corn is harvested before the kernels develop. Open the peel
and carefully peek to get a sense of how mature the corn is. Regular harvest
encourages greater crops. Popping-corn should be left until the kernels are
dry. After which, they should be harvested and dried even more spread out in a
warm room indoors.
How? Harvest, prepare, eat. The cobs are
easy to break off of the plant by hand. You should not let many minutes pass
after you harvest them till they’re boiling in the pot.
Corn that is left for a long while after harvest loses
flavor and elasticity as the sugar transforms into starch quickly. It is also
great to grill corn. If you grill them fresh you don’t have to remove the peel,
just polish them and remove the threads. If you grill them peeled, maybe even
slightly blanched, you may brush them with some chipotle glaze for a spicy and
smoky taste. Corn is best stored in the freezer.
Read more: Check out How
to Grow Beans and How
to Grow Lettuce from Greens! for more tips on growing
your own vegetables.
Reprinted with permission from Greens! Tips and
Techniques for Growing Your Own Vegetables by Karin Eliasson and
published by Skyhorse Publishing, 2013. Buy this book from our store: Greens!
Read more: http://www.motherearthnews.com/print.aspx?id={E6550943-2150-4D39-88F1-C21A3A02A0CF}#ixzz33EaksbAW
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