Fodder beet

Fodder beet is often used to lift BCS and grow youngstock through winter when pasture growth is low. It can also fill feed gaps for late lactation cows.

It’s a high-sugar, low-fibre feed, so the main risks tend to come from the speed of the diet shift, uneven intake between cows, and mineral gaps (especially phosphorus). A solid plan from the beginning of the wintering period reduces the chances of rumen upset and cows going down

This page is your quick guide to:

When fodder beet risks tend to show up
What to do right now
What to watch for
Which product types fit which fodder beet systems

Talk to your Agvance Consultant today.

Timing and risk windows

Early feeding (transition onto fodder beet)

The biggest risk window is the first 2–3 weeks. Fodder beet is sugar-rich, so moving too fast can drop rumen pH and lead to acidosis, down cows, or deaths.
- Read more about the link between winter nutrition and a smooth transition.

Mid-winter (steady crop)

Once cows are fully on crop, uneven intake becomes a problem. If some cows get more bulbs and others hang back, you can get a mix of scouring cows and cows that aren’t getting their share in the same mob.
Phosphorus (P) shortfalls are common on fodder beet-based diets, including close to calving, so P coverage needs to be planned for.

Late winter to pre-calving (springers on fodder beet)

If springers are on crop, keep a closer eye on phosphorus and overall mineral delivery in the last few weeks before calving.
- DairyNZ flags fodder beet as an example of a low-phosphorus feed where supplementation may be needed.

What to do this week

Write down the actual diet (fodder beet, leaf-to-bulb, pasture, silage, straw, PKE, meal) and decide the mineral delivery method that will actually be eaten every day.
If cows are moving onto fodder beet now, check the transition plan and slow it down if you’re tempted to “just get it done”. Quick diet changes are where big losses happen.
Make sure fibre is part of the daily ration (silage or straw) so rumen function stays steady on a high-sugar crop.
If springers or youngstock are on fodder beet, plan phosphorus coverage (and how you’ll deliver it) before you see problems.
- Read more about how phosphorus levels relate to down cows.
Check access and behaviour at the break, ensuring there’s enough space and water, and that it’s not so tight that shy feeders miss out.

What to monitor

In the paddock

Intake consistency (clean-up, shy feeders, bullying at the lick or break).
Manure and rumen fill through any step-up or feed change.
Cows that look flat, go off feed, scour, or show “milk fever-like” signs during the transition period can be acidosis-related on high-sugar diets.

On paper

BCS trend through winter mobs and youngstock mobs.
Transition plan notes, including step-up rates, any setbacks, and which mobs struggled.
Mineral testing plan (blood and liver), timed around your system and vet advice.

Matching products to your system

Agvance has products for each system – free choice, dusting, water-soluble and premix options. Use the following as a starting point. Final rates still depend upon diet details and vet/nutritionist advice.

Free choice (good when cows are grazing, intake varies, or you want simple delivery)

Premium Fodder Beet Loose Lick – Built for fodder beet systems where calcium and phosphorus coverage matters.

Dusted on supplement (good when you are feeding silage or straw daily and want consistent intake)

CalciPhos Dusting Grade – Useful when you want calcium and phosphorus coverage through daily supplement feeding.

Added to feed (good for in-shed, TMR, or set supplement feeding)

CalciPhos Granular
Custom premix options – Best when you can control intake tightly and want a blend made for your ration.

Water-soluble (good when you are targeting phosphorus coverage through the water)

SoluPhos

Cows close to calving (if winter mobs include springers)

Free Choice Transition Starter – Better fit for the close-up group than a general crop product set.

Fodder beet FAQs

What’s the highest-risk time when feeding fodder beet?

The first 2–3 weeks. That’s when the rate of diet change and uneven intake can trigger rumen upset and acidosis. Read more about rumen health and a successful transition.

What should I focus on to reduce acidosis risk?

Run a staged transition onto fodder beet, keep fibre in the daily ration, and watch manure, appetite, and rumen fill closely during step-ups.

Which minerals are most likely to fall short on fodder beet?

Phosphorus is a common one to plan for, especially if fodder beet makes up a large share of the ration or springers are on crop.

What should I check this week to catch issues early?

Intake consistency across the mob, manure change during step-ups, rumen fill, and any cows that go flat or drop feed after allocation changes.

What’s the best way to deliver minerals on a fodder beet system?

Match the method to what you can control: free-choice lick for grazing mobs, dusting when cows get supplement daily, water-soluble for water systems, and in-feed/premix for in-shed feeding systems.

Recommended products

Have more questions or ready to order?

Your Agvance Consultant can help you form the best plan of attack for your fodder beet mineral programme. Get in touch today. Ready to order? Simply head to My Account, login or register, and complete your order online.