Hefty Brand Corn 5003 100-day Hybrid Header
SmartStax RIB logo

Ear Type
Cob Color
GDUs to Mid-pollination
GDUs to Black Layer
Pollination for Maturity


Ear Type – Semi-Flex
Cob Color – Red
GDUs to Mid-pollination – 1240
GDUs to Black Layer – 2370
Pollination for Maturity – Medium


Exciting SmartStax® product with dual-purpose potential! Tall hybrid with a very good stalk that produces heavy kernels and a lot of tonnage. Works very well in continuous corn.


HPPD herbicide tolerance to 2-3X rates is not great, so follow the labels and don’t overlap.


This is a really good SmartStax® product that can push for very high yields and also produce tonnage if you need silage corn. It works in nearly all soil types and excels in the high yield environments. The roots are good, but we’ve seen an advantage adding an insecticide and Alpha Complete in the furrow.


H4734 Agronomic Chart

The higher the number, the better the performance or rating.

Hefty Corn 4734 Plot Results

YearBrandProductTraitRMMoistureDry Bu/AcYield RankPlot NameStateCooperator
2019HeftyH4734SS9724.9158.44Freeman, SD Corn 2019FreemanSDAg PhD
2019HeftyH4734SS9721.2209.68South Bird Island, MN Corn PlotBird IslandMNAg PhD
2019HeftyH4734SS9724.5185.67South Watertown Corn PlotWatertownSDAg PhD
2019HeftyH4734SS9722.61997North Groton, SD Corn PlotGrotonSDAg PhD
2020HeftyH4734SS9720.3202.662020 Hancock MN Corn Plot 2HancockMNAg PhD
2020HeftyH4734SS9718.218210Cyrus, MN Corn Plot 1CyrusMNAg PhD
2020HeftyH4734SS9722.9152.911Watertown, SD Corn Plot 2WatertownSDAg PhD
2020HeftyH4734SS9715.8230.116Alton, IA Ultra Early-Season F.I.R.S.T. Corn PlotAltonIAF.I.R.S.T.

My Hefty 4734 corn was planted two days later than the neighbor’s Mycogen and Hefty came up before. This is going to have to translate into more yield and more money in my pocket!

Sam, Quincy, Washington

I am really excited to see how Hefty 4734 ends up this fall. It has looked great all year!

Josh, Minnesota

I have really been pleased with the overall performance of Hefty Brand Seed and plan on using it in the future.

Joe, Southeast Minnesota

Hefty always brings good products and information. I have good luck with their products!

Brett, Lakeville, Minnesota