How To Grow Popcorn

Want to grow your own popcorn? Learning how to grow popcorn is a fun and rewarding project for any home gardener. It’s not much harder than growing sweet corn, and the reward is your own supply of fluffy, buttery snacks. This guide will walk you through every step, from choosing the right seeds to popping your harvest.

Popcorn (Zea mays everta) is a special type of corn. Its kernels have a hard, moisture-sealed shell that explodes when heated. To grow it successfully, you need to focus on variety selection, planting timing, and proper curing. Let’s get your patch started.

Choosing the Right Popcorn Seeds

Don’t try to plant popcorn from the grocery store. It’s often dried for eating, not growing. You need to buy seeds meant for gardening.

Yellow Popcorn: Classic yellow kernels with a traditional flavor. Varieties like ‘Robust’ or ‘Japanese Hulless’ are reliable.
White Popcorn: Tends to be more tender and have smaller kernels. ‘Tom Thumb’ is a great small-space variety.
Multicolored Popcorn: Striking red, blue, or black kernels. ‘Glass Gem’ is famous for its beautiful, jewel-colored ears, though its popping quality can vary.

Always check the “days to maturity” on the seed packet. This tells you how long it takes from planting to harvest.

When and Where to Plant

Popcorn needs warm soil. Plant seeds at least 1-2 weeks after your last spring frost, when soil temperatures reach at least 60°F (16°C). A sunny spot is non-negotiable.

Sun: Full sun (at least 6-8 hours of direct light daily).
Soil: Well-draining, fertile soil. Mix in compost before planting for best results.
Space: Popcorn is pollinated by wind. Plant in blocks of at least 4 rows, not single long rows, for good kernel development.

Preparing Your Garden Bed

Loosen the soil about 8-10 inches deep. Remove weeds and rocks. If your soil is poor, add a balanced, all-purpose fertilizer according to package directions. This gives your plants a strong start.

Planting Your Popcorn Seeds

Follow these simple steps for planting:

Create rows 30-36 inches apart.
Plant seeds 1 inch deep and 8-10 inches apart within the row.
Water the rows thoroughly after planting.
Seeds should sprout in about 7-10 days if the soil is warm enough.

You can also start seeds indoors in biodegradable pots 2-3 weeks before your last frost. This gives you a head start in cooler climates. Transplant carefully to avoid disturbing the roots.

Caring for Your Popcorn Plants

Once your popcorn is growing, it needs consistent care. The main tasks are watering, weeding, and feeding.

Watering and Weeding

Corn needs about 1 inch of water per week. Water deeply at the soil level, especially when the stalks begin to tassel and silk appears. Consistent moisture is key for full ears. Keep the area weeded, especially when plants are young. Weeds compete for water and nutrients.

Fertilizing for Success

When plants are about knee-high (12 inches), side-dress them with a nitrogen-rich fertilizer. This means sprinkling fertilizer alongside the rows and watering it in. Nitrogen supports strong, tall growth and good ear development.

Dealing with Pests and Problems

Common corn pests include birds, raccoons, and corn earworms. For birds, try garden netting. For earworms, a few drops of mineral oil on the tip of each ear after silks brown can help. Rotating where you plant corn each year helps prevent soil-borne diseases.

The Big Moment: Harvesting Your Popcorn

Harvest time is in late summer or early fall. Don’t pick your popcorn like sweet corn. You must let it dry fully on the stalk.

The husks will turn from green to a dry, papery brown.
The kernels will be hard and glossy.
A fingernail pressed into a kernel should not release any milky liquid.

Once the husks are brown and dry, pick the ears. Pull back the husks to expose the kernels. This is called “field shelling” and it helps with drying.

Curing and Shelling for Perfect Pops

This is the most important step! Popcorn must have very low moisture content (around 13-14%) to pop well.

After harvest, braid husks together or place ears in mesh bags.
Hang them in a warm, dry, well-ventilated place for 3-4 weeks. A garage or shed often works well.
Test for dryness by shelling a few kernels. They should be very hard and come off the cob easily.
Once fully dry, twist the ears to remove the kernels. Your fingers work, or you can rub two cobs together over a bucket.
Store your shelled popcorn in airtight containers like glass jars. Keep it in a cool, dark cupboard.

A properly cured kernel will have a glassy, shiny appearance. If it looks dusty or dull, it may need more drying time.

Popping Your Homegrown Harvest

Now for the fun part! Use your favorite popping method—air popper, stovetop, or microwave bowl. Homegrown popcorn may need a bit more heat or time than store-bought. Don’t be discouraged if a few kernels don’t pop; this is normal. The flavor of fresh, homegrown popcorn is incredible and worth the wait.

Frequently Asked Questions

Can you grow popcorn next to sweet corn?
It’s not recommended. They can cross-pollinate, which might make your sweet corn starchy and your popcorn less flavorful. Plant different corn types at least 250 feet apart, or choose varieties with very different maturity dates.

How much popcorn will one plant produce?
Typically, each healthy stalk produces 1-2 ears. Each ear can yield about 1/2 to 3/4 cup of shelled popcorn. Plant a block of 20-30 plants for a substantial harvest.

Why didn’t my homegrown popcorn pop well?
The most common reason is improper curing. The kernels were too moist or not dried evenly. Make sure to let them cure fully in a warm, airy spot for several weeks before shelling and storage.

Can I save seeds from my popcorn to plant next year?
Yes, you can! Simply set aside some of your largest, best-formed kernels from your cured harvest. Store them in a cool, dry place and they should be viable for planting next season. Make sure they are from a non-hybrid (heirloom) variety for truest results.

Growing your own popcorn is a simple joy. With some sunshine, water, and patience for the curing process, you’ll be enjoying the fruits of your labor in no time. There’s nothing quite like the smell and taste of popcorn you grew yourself.