Can I plant corn from store-bought kernels?

Written by
Olivia Mitchell
Reviewed by
Prof. Charles Hartman, Ph.D.Store-bought corn seeds are a gamble since modern hybrids are bred for processing and shipped in bulk. Often, they are treated in a way that does not allow for germination. You can rarely find heirloom plants that will produce, but seeds from garden centers are far more reliable.
Commercial Kernels
- Hybrid types don't reproduce true to parent
- Often treated with fungicides inhibiting growth
- Germination rates typically 20-40%
- Variable performance in home gardens
Certified Seeds
- Guaranteed germination rates above 85%
- Non-treated options available for organic growing
- Specific variety traits maintained
- Disease resistance documented
Prepare seeds properly for best results. Pre-soak the kernels overnight in lukewarm water to soften the seed coats. Sow at a depth of 2.5cm when the soil temperature is 15°C. Space plants 30cm apart in blocks to ensure pollination. Isolate the corn varieties if cross-pollination is likely to cause problems.
Isolation Requirements prevent crossing of different varieties of corn. Separate different varieties of corn by a distance of at least 800 feet, or use a physical barrier, and plant them so that the bloom periods do not overlap. Bag the emerging ears before they develop silks. These precautions will help maintain the purity of the variety of both sweet and supersweet corn.
For seed saving choose only open-pollinated heritage varieties. Pick ears from the most vigorous (disease-free) plants. Dry kernels thoroughly before storage! Store in tight containers with silica gel packets. Determine how the germination rates perform every year before the planting season.
Success is the result of good technique and quality seeds. Ensure the seeds are certified and suited to your vegetable-growing climate. Continue through the process following correct planting depths and spacings. Focus on increasing and troubleshooting your crop early. This procedure consistently yields reliable results every season.
Read the full article: How to Grow Corn Successfully at Home