If this winter has felt more blustery and unsettled than usual, you're not imagining it. Earth Sciences New Zealand has confirmed El Niño conditions in the Pacific, with forecasts indicating the event could strengthen further and have its greatest influence on New Zealand weather during the summer of 2026-27. While every El Niño event is different, forecasters are signalling a higher likelihood of drier conditions in many northern and eastern regions, along with periods of stronger winds.
For gardeners, that can mean soils drying out faster and plants coming under more pressure during extended warm spells. The good news? There are practical steps you can take now, while soils are still cool and workable, to help your garden cope better if dry conditions develop over summer.
What an El Niño Summer Could Mean for Your Garden
No two El Niño events follow exactly the same pattern, but in New Zealand they are often associated with:
- A higher likelihood of below normal rainfall, particularly in northern and eastern parts of the country.
- More frequent windy conditions, which can increase moisture loss from soil and plants.
- Faster drying of topsoil and container gardens during warm weather.
- Greater pressure on gardens that already struggle to retain moisture through dry periods.
This isn't a reason to panic. It's simply a reminder that preparing your soil before summer arrives is often easier than trying to rescue stressed plants in the middle of a hot, dry spell.
Why Soil Preparation Matters
Many gardeners think of mulching as something you do once summer arrives. While surface mulches are valuable for reducing evaporation, improving your soil's ability to hold moisture starts much earlier.
Adding organic matter to garden beds during late winter or early spring gives it time to become integrated into the soil before temperatures rise. Organic materials can help improve soil structure over time, supporting better water retention and creating a healthier environment for plant roots.One option some gardeners are choosing is wool mulch.
Why Gardeners Use Wool Mulch
Wool is an interesting natural material because its fibres can absorb and hold significant amounts of moisture relative to their weight. When incorporated into garden beds, wool-based products may help improve soil moisture retention while also contributing organic matter as they gradually break down.
Over time, wool mulch may:
Support Moisture Retention
Wool fibres can absorb water when it's available and may help retain some of that moisture within the root zone for longer, particularly when combined with healthy, organic-rich soil.
Add Organic Matter
As wool breaks down, it contributes organic material to the soil. Organic matter plays an important role in improving soil structure and helping soils hold moisture more effectively.
Encourage Soil Biological Activity
Like many natural materials, wool can provide a food source for soil microorganisms as it decomposes. Healthy soil biology contributes to long-term soil health and resilience.
Provide a Gradual Nutrient Contribution
Our Wool Garden Mulch combines wool, and sheep manure, providing organic matter and nutrients that are released gradually as the material breaks down.
Because wool-based products decompose slowly, incorporating them into garden beds during late winter or early spring gives them time to begin integrating with the soil before the driest part of summer arrives.
How to Incorporate Wool Mulch Into Garden Beds
1. Prepare the bed
Remove weeds and lightly loosen the top 15- 20cm of soil.
2. Apply the mulch
Spread a generous layer of wool mulch evenly across the surface.
3. Work it into the soil
Mix the mulch through the upper soil layer so it is incorporated where plant roots will grow.
4. Water well
Give the area a thorough watering to help settle the material and begin the breakdown process.
5. Finish with a surface mulch if desired
Once planting is complete, a surface mulch can provide an extra layer of protection against moisture loss.
This type of preparation may be particularly useful in beds destined for moisture-hungry crops such as tomatoes, courgettes, pumpkins, strawberries, and leafy greens.
The Bottom Line
If forecasts are correct and El Niño brings drier and windier conditions this summer, gardens with healthy, moisture-retentive soils are likely to be better placed to cope. Taking the time to add wool mulch now can help improve soil health and support more consistent moisture levels through the growing season. Helping you keep your watering bill down over the hot summer months. Win for the garden and a win for your wallet.
0 comments