Why Summer Grazing Determines Autumn Feed
To build autumn and winter feed on a New Zealand farm, manage summer grazing around pasture recovery: match rotations to leaf growth, protect consistent post-grazing residuals, and use a feed budget to act before supply falls behind demand. Plan autumn pasture renewal early, but base sowing on suitable soil moisture, soil temperature and local conditions.
In New Zealand pastoral systems, autumn pasture growth doesn’t happen by accident. The amount and quality of feed available in March–May is largely determined by how pasture is managed during summer.
Across dairy, sheep, beef, and deer farms, the same rule applies:
Pasture recovery in autumn is earned during summer.
Heat, moisture stress, and slower leaf emergence mean pasture needs protection, not pressure. Smart summer grazing builds a feed bank that reduces reliance on supplements and improves system resilience heading into winter.
1. Rotational Grazing: Slow the Round to Grow More Feed
During summer, pasture growth rates slow due to reduced moisture and higher soil temperatures. Continuing spring-style rotations is one of the fastest ways to burn out pasture.
Best practice summer grazing includes:
Rotational grazing with stock moved every few days
Extending rotation length to allow adequate regrowth
Grazing closer to the three-leaf stage rather than fixed dates
Slowing the rotation in late spring and early summer is one of the most effective tools for increasing autumn feed supply.
2. Residual Management: Graze Clean, But Not Too Short
Repeated severe grazing during dry conditions can weaken pasture plants and delay recovery when rain returns. Protect growing points and allow adequate regrowth between grazings.
Summer residual management:
For ryegrass dairy pastures: 1,500–1,600 kg DM/ha as a DairyNZ summer guideline; agree suitable targets for other systems
Low enough to maintain quality
High enough to protect ryegrass crowns and soil moisture
Full complete swards not bare soil patches
Consistent residuals help protect pasture persistence. Manage facial eczema separately using local risk monitoring and advice from your veterinarian.
3. Reduce Heat & Moisture Stress
Leaving adequate residual cover provides shade and insulation for soil and roots.
Benefits include:
Reduced soil temperature spikes
Better root survival during dry periods
Faster pasture response when moisture returns
Improved clover survival for autumn nitrogen fixation
When covers fall below 1,500 kg DM/ha, introducing supplements early can protect pasture and maintain future feed supply.
4. Feed Budgeting: Build a Summer Feed Bank
A feed budget allows farmers to plan winter demand and work backwards through summer and autumn.
A simple feed budget helps answer:
How much feed is required by winter?
Which paddocks will supply that feed?
Where can pressure be reduced early (culling, drying off, supplements)?
Farms that actively build a feed bank over summer are far less exposed to expensive supplementary feeding later in the season.
5. Strategic Cropping for Feed Gaps
Where pasture supply is limited, summer or autumn crops can help fill gaps.
Common options include:
Forage rape, brassicas, fodder beet or turnips
Chicory, plantain, lucerne and Clovers
Green feed maize or sorghum for later sowing
Set crop inclusion rates, fibre supply and transition plans for the specific crop and livestock class with your nutrition adviser. A single diet percentage does not suit every crop or farm.
6. Soil Fertility & Nitrogen Management
Good pasture performance starts below ground.
Key considerations:
Soil testing for pH, P, S, K, and trace elements
Use soil test results and soil-specific pH targets to determine whether lime is needed and at what rate
Nitrogen applications only where soil moisture supports growth
Addressing compaction and weed pressure early
Deferred grazing can also improve ryegrass density and pasture persistence heading into autumn.
7. Preparing for Autumn Pasture Renewal
If pasture renewal is planned for Autumn (February–April) early preparation is critical.
Ask yourself:
Which paddocks underperformed last season?
What is the weed pressure like in that paddock, does it need a short term crop?
Is a long term Perennial, mid term Hybrid, or short term Annual pasture best suited?
Is seed supply planned and secured for the optimal sowing window?
Early planning leads to better establishment, stronger autumn growth, and improved return on investment.
👉 Explore our 2026/2027 pasture seed options here:
Final Thought
I say Summer pasture management isn’t just about getting through the dry months — it’s about setting up the entire year ahead. By managing rotations, residuals, fertility (soil health), and feed supply now, so you can enter autumn and winter with stronger pastures, more flexibility, and lower costs.
Summer grazing FAQs
What is an autumn and winter feed bank?
A feed bank is the usable pasture and supplementary feed planned for a future period. Work backwards from animal demand and your target dates, then compare that demand with measured pasture cover, expected growth and feed already on hand. Standing feed still needs to retain useful quality.
How should I choose a summer grazing rotation?
Use pasture growth, leaf stage, residuals and livestock demand together. In summer-dry ryegrass pastures, slower leaf emergence can mean allowing more recovery time. Avoid extending the round by forcing animals to graze below the target residual, and review the plan as moisture and growth change.
Do the same residual targets suit every NZ farm?
No. DairyNZ gives a summer guideline of 1,500–1,600 kg dry matter per hectare (kg DM/ha) for ryegrass dairy pastures. Other pasture species, livestock classes, measurement methods and farm objectives can require different targets. Agree paddock-specific targets with your adviser; pasture cover and uncompressed sward height are not interchangeable measurements.
Which pasture seed should I consider for autumn renewal?
Start with the job the paddock needs to do: short-term feed, a medium-term pasture, or a longer-term grazing base. Compare annual, Italian, hybrid and perennial ryegrass options, alongside suitable clovers and herbs. Match the mix to soil, drainage, summer moisture, pests, stock type and the feed gap.
Need a seed plan that fits your feed budget?
Talk to Vernado about your region, livestock, paddock conditions and the months when you need feed. Call 0508 733 343 or email sales@vernado.co.nz to discuss suitable pasture seed options.