Six Paddocks and a Moving Herd: Running Rotation on Perennial Grass

A pasture that gets grazed all season with no break is a pasture that quits on you. The best plants get bitten again before they recover, and the weeds and bare spots get the next turn. Cutting the ground into six paddocks and moving the herd gives the grass a rest. It takes some fence, some water and some discipline, but it is not rocket science.

The rest math

Here is the one formula that runs the whole thing. Rest days equal days in each paddock times the number of paddocks, minus one. Six paddocks, three days in each: fifteen days of rest. Four days in each: twenty days. If your grass needs thirty days to come back, three days in each paddock is not going to cut it. You need more paddocks, shorter stays or fewer cows. Better to know that on paper than after the field goes thin.

Lay it out

Try to make the paddocks hold about the same feed, not the same acres. A bottomland paddock that grows twice what the hillside does should be smaller. Think about where the water goes before you set a single post. A paddock without water is a paddock cattle will not graze evenly, and a long walk to a tank wears trails and wastes grass.

A lane down the middle with paddocks off both sides is simple to run. Gates at the lane mean you move cattle in minutes, with one man and a bucket if they are trained. For a stream or a long hillside, strips can work, but plan water carefully.

Know when to move

Do not move on the calendar alone. Go by the grass. Start grazing when the plants have reached a good height for the species, and take the cattle out before they eat it close to the crown. The leaf is where the feed is, and leaving some behind lets the plant regrow faster. Your extension agent can give you target heights for your grass. Our rotational grazing guide goes through stocking rate and rest periods, and the farm.fm page on rotational grazing techniques adds more.

Spring flush and summer slump

In spring the grass can outrun the cattle. A lot of operators skip a couple of paddocks and cut them for hay, so the rotation does not get ahead and quality does not fall. Then summer comes. Growth slows in heat and dry weather, and the rest period that worked in May is too short in August. You slow the moves, feed some hay, or take a few cows off. Do not stubbornly keep the schedule while the grass dies. The system serves the grass, not the other way around.

Fence and water without going broke

Perimeter fence has to be good. Interior fence does not. Cattle that are used to moving to fresh grass will respect a single strand of electric, and polywire with step-in posts lets you split a paddock for a few days. We cover the options in building a fence cattle respect. Water is where most systems fail. Put it in or next to every paddock, a shared tank at a hub fence, or run a line. If you do just one thing well, do that.

Teach the cattle the routine. Calm handling pays here, and the Beef Quality Assurance material at bqa.org is worth a read. Cattle that learn the sound of the truck or a bucket will walk to the next paddock without a fight.

Mistakes that sink a rotation

Most failed rotations share the same few errors. The first is too many cows for the ground, which no fence can fix. The second is moving on the calendar with no look at the grass. The third is water that does not reach every paddock, so cattle camp and trample instead of grazing. The fourth is skipping the notes, so nobody remembers which paddock went thin. And the fifth is quitting after one dry summer, before the pasture has had a chance to show what rest does. Fix those and the system tends to take care of itself.

Write it down

Keep a pocket notebook, or a note on your phone. Date in, date out, rough grass height, rain, problems. After a season or two it tells you which paddocks come back slow and how many cows the place really carries. The ATTRA project offers free monitoring sheets if you want a form.

What not to expect

A lot of men say rotation lengthens the grazing season and cuts the hay bill, and that matches what many producers report, but results depend on rainfall, soil, stocking rate and how well you run it. Rotation is no cure for too many cows. Studies of grazing systems have been mixed, and stocking rate often matters as much as the system. Try it on one pasture, count the cost of fence and water, then decide.

Where to start Monday morning

• Sketch six paddocks and mark the water.
• Do the rest math with your numbers.
• Pick a stay length that fits today's growth.
• Move on grass height, not hunch.
• Keep notes and adjust.

For fence builders, tank suppliers and conservation offices near you, try agriculture.directory. Target heights and rest periods vary by species and region, so confirm with your extension agent. This site is independent and not affiliated with the American Angus Association or Certified Angus Beef.