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December 21, 2018 | Tags: , , , , , ,

How to Grow Rice in St. Louis

Do you want to grow something totally different in your youth garden next year?  Something that will surprise everyone who sees it? How about rice?

This year, we grew rice at our Demonstration Garden and Lucy, our School Programs Manager, grew rice at the Gateway Elementary school garden.  Would you believe that the rice did great at both places?

When most people think of growing rice, they imagine a large flooded field somewhere in the humid tropical areas of Asia.  While flooded rice in grown in Japan, upland rice varieties can also grow in Russia, Poland, and in northern Vermont.

Though rice is grown extensively in the tropics and often grown in a flooded situation, it is actually a remarkably adaptable crop.  Rice can grow in conditions where the field is alternately flooded and dry. In fact, there are even types of rice, called upland rice, that grow in fields just like corn and wheat.  

Because of its adaptability, you can grow rice in your own backyard here in Missouri.  You won’t get much rice unless you’re growing in a large area, but that shouldn’t stop you because there are many reasons why you should grow rice.

Rice is particularly a great plant to grow with children; it’s really easy to grow, has virtually no weed problems because of the flooding, and matches well with the school calendar.  It’s also just fun to grow grain.

Read on to find out how we grew flooded rice and how you can too!


The first and most important step is getting the right variety.  We started with a “japonica” rice variety, which is more adaptable to our northern climates and is triggered to produce seed by day length, not by length of the warm season.  This ensures you will get a crop, whereas if you grow traditional varieties there is a chance that you won’t get any grain at all. The variety we grew was called Koshikari, which we purchased from Kitizawa Seed.  

Next, decide what type of “paddy” you will grow your rice in.  Since it’s a flooded rice, you will need something that will retain water.  Whatever you plant it in will need to be at least a foot deep and watertight.  You can grow in containers like 5 gallon buckets, plastic tubs, old bathtubs, whatever you have that’s deep and watertight.  If you want to make a large area, a specially-made raised bed is your best bet, which is what we decided to do.

We built a double high raised bed that was 2’ tall. You can use our construction plans for a double high raised bed which has worked great for us.  If you decide to use a different design, make sure the different layers of boards stay together.

Once we built the bed, we lined the entire thing with a triple layer of plastic.  We just used a plastic drop cloth you can find in the painting section of any hardware store.  We triple layered the plastic and lined the entire inside of the raised bed with it.


After lining the bed with plastic, fill with a good garden soil mix.  For our raised beds, we used a mix made up of 50% topsoil and 50% compost.  


Now that you have your paddy, you’re ready for the easy part: growing the rice!

The best way to do this is to start the rice indoors in pots around mid April. Plant at least a few seeds per pot and keep well watered.  Make sure they have a strong light source and be sure to thin each pot to one seedling.

In mid-May, flood your rice paddy so that there is standing water about 2” above the soil surface. The next day, reflood if needed (water may have settled) and plant your rice into the flooded paddy about 6” apart in rows that are 12” apart.



How do you plant into a flooded field you ask?  It’s really easy. The soil is so saturated you just take the roots of the seedling in your hand and push it into the soil, that’s it.


It was at this point that we started adding mosquito dunks to our rice paddy so that the standing water didn’t turn into a mosquito breeding ground.   Mosquito dunks are an organic insecticide and you can purchase that are granular or donut-shaped granules of BT, a bacteria that is toxic to mosquito larvae (but not to people or beneficial insects).  There are several online that you can purchase.


From mid-May until about mid-September, the only maintenance needed is to make sure the paddy stays flooded.  If there are any weeds, pull them out – we had one weed this year.

By early August, you will start to see the seed heads popping up from the stalks.

In September, your seed heads will start to droop.  When they start to droop like this, stop watering your rice.  Let the soil dry out and no longer keep it flooded.


Over the next few weeks, the water level will drop and the seed will turn a golden color.  When the drooped seed heads turn a golden brown and the leaves are still green it is time to harvest.








To harvest, cut all of the stems at ground level.  Lay the plants out on a table or somewhere that has good air circulation, but is protected from birds.  If they are not protected from birds, they will eat all of your rice!









Let it lie out to dry for at least a few weeks, moving the plants around every few days so that it dries completely and doesn’t mold.  When the stems have turned to a straw color, they are ready to process!


To learn how to process the rice into edible grains stay tuned for a post from Lucy about processing it with students and how to integrate rice growing into lessons.