The sweetest corn you can grow belongs to the Sh2 (supersweet) genetic varieties, renowned for their exceptionally high sugar content and crisp texture.
These specialized corn types are often labeled as "supersweet corn" due to their genetic makeup, which allows them to convert more sugar into starch at a slower rate than other sweet corn varieties. Sh2 varieties can boast a sugar content ranging from 28% to 44%, making them significantly sweeter than traditional sweet corn. The "Sh" in Sh2 refers to the characteristic shrunken appearance of the kernels once they are dried. Beyond their intense sweetness, Sh2 varieties also offer an extended shelf life, typically staying fresh for 9-10 days after harvest, which is longer than other sweet corn types.
Understanding Sweet Corn Genetic Types
To fully appreciate the sweetness of Sh2 corn, it's helpful to understand the different genetic types of sweet corn available to home gardeners. Each type offers a unique balance of sweetness, texture, and shelf life.
Here's a comparison of the primary sweet corn genetic types:
| Sweet Corn Type | Sugar Content / Sweetness | Kernel Texture | Shelf Life | Characteristics |
|---|---|---|---|---|
| su (Sugary) | Moderate | Creamy | Short | The "traditional" sweet corn flavor; sugars convert to starch quickly after harvest. Examples: Silver Queen, Early Sunglow. |
| se (Sugar Enhanced) | High | Tender, juicy | Medium | Sweeter than su, with a more tender kernel. Good for fresh eating and home freezing. Examples: Bodacious, Temptation. |
| sh2 (Supersweet) | Very High (28-44%) | Crispy, crunchy | Long | The sweetest type; sugars convert to starch very slowly, maintaining sweetness for longer. Examples: Honey 'N Pearl, Obsession. |
Why Choose Sh2 (Supersweet) Varieties?
Growing Sh2 varieties offers several distinct advantages for those seeking the ultimate sweet corn experience:
- Exceptional Sweetness: With the highest sugar content, Sh2 corn provides an intense burst of sweetness that is unmatched by other types.
- Extended Freshness: Their slow sugar-to-starch conversion means they retain their sweetness and quality for up to 9-10 days after picking, making them excellent for storage and transport.
- Crisp Texture: Sh2 kernels offer a pleasingly crisp and crunchy texture, adding to the overall eating experience.
- Versatile Use: Ideal for fresh eating, freezing, or canning, as they maintain their quality well.
Tips for Growing Supersweet Corn
To achieve the best results when growing Sh2 (supersweet) corn, consider these important tips:
- Isolation is Key: Sh2 varieties must be isolated from other types of corn (including field corn, popcorn, and other sweet corn varieties like su and se). Cross-pollination can cause the supersweet kernels to become starchy and lose their desired sweetness and texture. Plant them at least 250 feet away from other corn types or ensure their pollination times do not overlap.
- Soil and Sun: Plant in full sun (at least 6-8 hours daily) and well-drained, fertile soil. Corn is a heavy feeder, so amend the soil with compost before planting.
- Watering: Consistent moisture is crucial, especially during tasseling and silking. Water deeply, particularly during dry spells.
- Planting Density: Plant in blocks or short rows rather than a single long row to ensure good pollination and full kernel development.
- Harvesting: Harvest when the silks are dry and brown, and the kernels are plump and milky when punctured. The best time to pick is in the cool morning.
Popular Sh2 (Supersweet) Cultivars
Many excellent Sh2 varieties are available to home gardeners. Here are a few popular choices:
- Honey 'N Pearl: Many gardeners consider this an outstanding bi-color (yellow and white) supersweet variety known for its tender kernels and excellent flavor.
- Obsession: A popular yellow supersweet corn that combines great taste with strong disease resistance.
- How Sweet It Is: A classic white supersweet variety recognized for its intense sweetness and tender kernels.
Choosing an Sh2 variety will ensure you harvest the sweetest corn possible from your garden, offering a truly delightful and rewarding culinary experience.
