How Long Does Corn Take to Grow?
How long does corn take to grow? If you’re thinking about planting corn in your garden, that’s probably your first question. Luckily, corn is a fun and rewarding plant to grow, even for beginners. Whether you’re gardening at home or helping out on a small farm, knowing how long corn takes to grow helps you plan everything—from planting to harvest.
In this easy-to-read guide, we’ll walk through the full journey of corn—from seed to harvest. We’ll also answer common questions and give you helpful tips. Let’s dive in!
Table of Contents
How Long Does Corn Take to Grow from Start to Finish?
The answer depends on the type of corn, the weather, and how well you care for your plants. But on average, corn takes about 60 to 100 days to grow fully.
Here’s a simple breakdown of the corn growth timeline:
- Sweet Corn: 60 to 90 days
- Field Corn: 90 to 100 days
- Popcorn: 100 days or more
This means you’ll need at least 2 to 3 months of warm weather. Corn does not grow well in cold temperatures.
According to Iowa State University Extension, sweet corn matures faster than most other types.
Stages of Corn Growth: From Seed to Harvest
Let’s look at each stage of corn’s life. This will help you understand what’s happening underground and above it.
Stage 1: Planting the Seeds
Corn seeds are usually planted in late spring when the soil is warm. The ground should be at least 60°F (16°C). Cold soil can slow down or stop seed growth.
Use these planting tips:
- Space seeds about 1 inch deep
- Plant seeds 9-12 inches apart
- Keep rows at least 30 inches wide
With good soil and sunlight, your corn seeds will start to grow in 7 to 10 days.
Stage 2: Seedling Stage
Now the corn sprouts pop out of the ground! These baby plants are called seedlings.
This stage usually lasts 2 to 3 weeks. During this time, the corn plants are growing roots and tiny leaves.
➡️ It’s very important to keep the soil moist and weed-free during this stage.
Stage 3: Vegetative Growth
This is the stage where corn grows tall and strong. It can reach 6 to 12 feet high!
Each part of the vegetative stage has a name:
- V1 to V(n): V1 means the plant has one leaf. V(n) means it has many leaves.
- This stage usually lasts 30 to 40 days.
During this time, corn needs full sunlight, enough water, and good soil.
If it’s hot and dry, your corn may grow slower unless you water it regularly.
Stage 4: Tasseling and Pollination
This is one of the most exciting stages! The plant starts making tassels (the flowers at the top) and silks (tiny threads that grow from each ear).
➡️ Each silk must catch pollen to make a kernel. Bees and the wind help with pollination.
This stage is very short—only 7 to 10 days—but super important. If pollination doesn’t happen, the corn won’t grow ears.
Stage 5: Ear Development and Kernel Filling
Now the corn ears begin to form. Inside, kernels are growing and filling with nutrients.
This stage lasts about 20 to 30 days. The leaves still gather sunlight and feed the kernels.
Keep watering during this time. Dry corn plants will not make full, sweet ears.
Stage 6: Maturity and Harvest
Your corn is now ready to harvest! But how do you know it’s time?
Here are some easy signs:
- Sweet corn: Kernels are full and milky when you press them
- Field corn: Kernels are hard and dry
- Leaves: Begin to turn brown and dry
Harvest sweet corn when the ears feel full and firm. That’s usually 60 to 90 days after planting.
Factors That Affect How Long Corn Takes to Grow
Even though corn has a general timeline, several things can make it grow faster or slower. Let’s go over them:
☀️ Temperature
Corn loves warm weather. If it’s too cold, growth will slow or even stop. Aim for 60°F to 95°F for the best growth.
Watering
Corn needs a lot of water, especially during pollination and ear filling. Without enough water, kernels may not form well.
For best results, give corn 1 to 1.5 inches of water per week, as recommended by University of Minnesota Extension.
Soil Quality
Healthy, rich soil helps corn grow fast. Make sure your soil has:
- Nitrogen
- Potassium
- Phosphorus
You can add compost or organic fertilizer before planting.
Pests and Disease
Keep an eye out for:
- Corn earworms
- Cutworms
- Fungal disease
Catch these early! They can damage your plants and slow growth.
Different Types of Corn and Their Growing Times
| Type of Corn | Average Growing Time | Best Use |
|---|---|---|
| Sweet Corn | 60–90 days | Eating fresh, grilling, or boiling |
| Field Corn | 90–100 days | Animal feed, fuel, cornmeal |
| Popcorn | 100+ days | Making popcorn |
| Ornamental | 90–110 days | Decoration |
Choosing the right corn type depends on your purpose. If you just want to eat corn on the cob, sweet corn is the best pick.
How Long Does Corn Take to Grow?
FAQs: How Long Does Corn Take to Grow?
How long does corn take to sprout?
Corn usually sprouts in 7 to 10 days if the soil is warm and moist.
Can I grow corn in pots or containers?
Yes, but it’s tricky. Corn has deep roots, so use very large pots and grow in blocks to help with pollination.
When should I plant corn?
Plant corn in late spring, after the last frost, when soil is at least 60°F (16°C).
How do I know my corn is ready to harvest?
Pull back a little husk. If the kernels are full and milky when poked, your sweet corn is ready.
Can I grow corn indoors?
Corn needs lots of light and space, so it’s not ideal for indoors. It grows best in outdoor gardens or fields.
Conclusion
So, how long does corn take to grow? Now you know the answer: usually 60 to 100 days, depending on the type and growing conditions. From seed to harvest, corn goes through exciting stages.
With the right care, water, sunlight, and love, you’ll be picking fresh ears of corn in just a few months. It’s a fun plant that teaches patience and gives tasty rewards.
Whether you’re planting one row or a whole backyard, growing corn is a great way to enjoy nature and learn about farming.
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