Still have grain in storage? Here’s how to manage it

Grain marketers indicate that 75% to 80% of on-farm grain bins will likely be empty by late spring. What if you still have a full bin? How do you maintain grain condition? After you empty it, what plans should you make to store this year’s crop properly?

“If you have corn in the bin now, keep the grain mass as cool as you can as long as you can,” said John Tuttle, vice president of sales and marketing for Brock Grain Systems. “If you have temperature cables in the bin, utilize them to monitor grain conditions. Otherwise, check grain condition manually every two to four weeks, and more often if necessary.”

Don’t forget about grain during the hectic planting season, Tuttle advised. Aerate during cool days and nights. If you’re holding into June, seal off fans at some point to prevent air migration into the grain.

Rehydrating soybeans

If you’re still holding overly dry soybeans, you may think about rehydrating them to regain weight. “It is possible to rehydrate soybeans in storage by utilizing aeration when the right temperature and humidity conditions exist,” Tuttle said. “It is helpful and maybe even necessary to utilize an automated aeration control system to manage this process.”

Even with an aeration control system, you still need the right weather conditions to rehydrate successfully, he said. Typically, the most moisture you may be able to add back is about 2%.

Bin integrity can become a concern. “Consider volume expansion that will occur during hydration,” Tuttle said. “Increasing moisture and volume may pack grain tighter, potentially increasing stress on grain bin sidewalls. If you’re trying to rehydrate more than 2%, consider coring the bin to relieve this pressure. Consult with the bin manufacturer before rehydrating.”

Starting from scratch

Here are six tips to start out right when storing the 2026 crop:

1. Assess crop condition. “Did the crop experience stress, like drought or disease?” Tuttle asked. In ’25, corn was often impacted by southern rust and/or tar spot. If it affected grain quality, additional management steps could be required. “Low-test-weight corn presents additional challenges in storage.”
2. Account for weather. Moisture levels and temperature ranges during harvest may impact management practices, especially in fall.
3. Consistently core bins. “Take out about half of the peak,” Tuttle said. “If you view it from the side, the remaining grain mass should resemble the letter ‘M.’ Taking out the center removes fines and promotes more consistent airflow.”
4. Dry grain to right level. For corn, Tuttle recommended 14.5% to 15.5%. If you could hold corn longer than six months, consider lowering to 13%. Bin soybeans at 12% to 13% for safe storage.
5. Cool grain to 35 to 40 degrees F. “Cooler temperatures equate to longer storage time,” Tuttle said. Keeping grain at 45 degrees or lower mitigates insect and mold activity.
6. Avoid freezing grain. “We don’t recommend freezing grain,” hesaid. “It costs more and contributes to issues with excessive condensation and ease of grain flow, especially if it is very warm when you finally empty the bin.”

Safety first

Taking all necessary steps to ensure grain stays in condition reduces potential issues with storage, entrapment, and injuries or death. 

“Keeping grain in condition starts with proper drying and aerating, and cooling grain properly,” Tuttle said. “Core the bin properly and do what you can to prevent moisture migration within the bin.”

Follow procedures recommended by the bin manufacturer when unloading large bins to protect structural integrity of the bin, Tuttle added. “Always start unloading from the center sump. Unloading from the side can create pressures that could result in damage or even collapse. If the center sump plugs, use the emergency sump if the bin has one.”

Keeping yourself safe is paramount. Here's a 12-point safety checklist included in the Brock Bin owners’ manual:  

1. Never enter a bin of flowing grain. Flowing grain can trap a person within seconds. 
2. Avoid out-of-condition grain. If it happens, be extra cautious working around it. 
3. Never enter a bin of unknown status. What you think is the grain surface could just be bridged or crusted grain with empty space below.
4. Never walk on surface crusts. Prohibit entry into the bin where these conditions exist.
5. If you must enter a bin, do it properly.  People trained to enter bins with evident danger must follow all safety codes.
6. Check rescue equipment. If the bin has winch systems, make sure they’re working properly.
7. Test the air. Before going into a bin with problems, test the air to make sure there is sufficient oxygen and no toxic gases.
8. Wear a safety-harness lifeline. Whoever goes into the bin should have a harness and lifeline that won’t allow the person to sink further than waist deep. 
9. Use lock out/tag out. All mechanical, electrical, hydraulic and pneumatic equipment should be locked out, with a padlock, before anyone enters a bin.
10. Habe helpers ready. Have a minimum of two people who can track and communicate with the person inside. 
11. Wear a dust-filtering respirator. In or outside the bin, wear a respirator where dust, mold and carbon dioxide could be present. 
12. Call for help. Assume they are alive, but don’t attempt to rescue them yourself. Call 911 or the correct local agency.