Growing Heirloom Corn in Containers

Want the taste of sweet, freshly-picked corn but lack a sprawling garden? Growing heirloom corn in containers is a surprisingly viable and rewarding option! While corn does require space, strategic selection and care can yield delicious results, even in small spaces and urban environments. This guide will walk you through everything you need to know to successfully grow heirloom corn in containers.

Why Grow Heirloom Corn in Containers?

Growing heirloom corn in containers offers several advantages:

• Space Saving: Ideal for balconies, patios, and small urban gardens.
• Control: You have greater control over soil quality and drainage.
• Portability: Easily move containers to maximize sunlight or protect from harsh weather.
• Unique Varieties: Enjoy the diverse flavors and colors of heirloom corn that might be unavailable locally.

Choosing the Right Heirloom Corn Variety

Not all heirloom corn varieties are equally suited for container gardening. Consider these factors:

• Size: Opt for shorter, more compact varieties like ‘Blue Aztec’, ‘Painted Mountain’, or ‘Dakota Black’. Standard corn types will simply require excessively large containers.
• Pollination: Corn is wind-pollinated. In containers, you'll likely need to hand-pollinate, so choose a variety with appealing traits even if it doesn't pollinate perfectly.
• Growth Habit: Look for varieties described as "bush" or "dwarf" for better container performance.

Container Requirements

Choosing the right container is crucial. Here’s what to keep in mind:

• Size: Each corn plant needs a container at least 20-24 inches in diameter and depth. Larger is always better!
• Material: Terracotta, plastic, or fabric pots work well. Ensure the container has excellent drainage holes.
• Drainage: Poor drainage will lead to root rot. Consider adding a layer of gravel at the bottom of the pot.

Soil & Planting

Use a high-quality potting mix designed for vegetables. A blend of peat moss, perlite, and compost provides good drainage and nutrients.

1. Fill the container with potting mix, leaving a few inches at the top.
2. Plant 3-4 seeds per container, about 1-2 inches deep.
3. Water gently but thoroughly.
4. Once the seedlings emerge, thin to the strongest plant per container.

Sunlight & Watering

Heirloom corn needs at least 6-8 hours of direct sunlight per day. Place your containers in the sunniest spot available.

Water regularly, especially during hot weather. The soil should be consistently moist but not soggy. Check the moisture level by sticking your finger an inch or two into the soil.

Pollination – The Key to Success

Since wind pollination is limited in containers, you're likely to need to hand-pollinate your corn. Here's how:

1. Identify the male flowers (tassels) at the top of the plant and the female flowers (silks) emerging from the developing ear.
2. Gently shake the tassel over the silks to release pollen. Alternatively, use a small paintbrush to transfer pollen from the tassel to the silks.
3. Repeat this process every few days as the silks emerge.

Fertilizing

Corn is a heavy feeder. Fertilize regularly with a balanced, water-soluble fertilizer specifically formulated for vegetables. Follow the instructions on the fertilizer packaging.

Troubleshooting

• Poor Pollination: Ensure you’re hand-pollinating frequently enough.
• Yellowing Leaves: Could indicate a nutrient deficiency. Fertilize more often.
• Pests: Monitor for pests like corn earworms. Treat as needed with appropriate organic pest control methods.

Harvesting

Harvest your heirloom corn when the silks turn brown and dry, and the kernels are plump and slightly milky when squeezed. Enjoy the fruits (or kernels!) of your container-grown corn!