SUPER EFFICIENT, SUPER CONVENIENT
Who wants to spend all summer standing on the end of a hose? Free yourself with low-tech, low-cost irrigation set-ups that see your garden through the dry times.
The trick to these watering hacks is delivering water slowly, so it sinks deeply into the soil instead of evaporating, crusting or running off. These systems can be used with a hose or watering can, or attached to a tap timer for full automation, or joined to a reservoir (such as a barrel, filled either with rainwater or tap water) that slowly empties over several days.
Spraying water around the leaves and topsoil encourages fungal diseases and creates shallow-rooted, needy plants. A deep weekly water, instead, encourages deep-rooted, resilient plants - better for your plants, your time and your water bill. It's also a more efficient use of water, putting less stress on infrastructure and on our local rivers and streams.
Some low-cost, low-tech irrigation options:
Great for indoor or outdoor container plants. Read more
CLAY POTS OR OLLAS
Used for thousands of years, these only need topping up once a week or so. Read more
SEEP HOSES/ROPE WICKS
Inexpensive and easy to install, these run off either mains or barrel pressure. Read more
Vertical pipes buried next to trees at planting time encourage deep-rooted, resilient plants. Read more
Store water for when it's needed. Read more
Recycle water from the bath, shower and laundry so every time you wash, you're also watering the garden. Read more
Sculpt the earth into contours that slow down rainwater and hold it for plants to use. Read more
Work out which parts of your garden you want to water, then make simple, slow-release systems that can run off a tap or a reservoir.
A reservoir could be a barrel, bucket or any large container. Attach these to a slow-release system (see opposite) and refill the reservoir every week or so.
ZONE YOUR GARDEN
Targeted watering is easier, cheaper and quicker.
WATER ON FRIDAYS
This always seems to be a strange piece of advice, but a lot of our water supply issues are caused by the summer peaks in usage. If you look at Kāpiti’s daily water use on a graph there are huge spikes on summer weekends, especially when it’s sunny and thousands of people all decide it would be a good day to wash the car, house or boat, or water the garden.
Our water infrastructure, an expensive system of pipes and pumps, has to cope with these dramatic peaks - even though that capacity might not be needed the other 90% of the year. So knocking the peaks off the water usage graphs is great news for ratepayers.
A deep watering on Fridays should see your plants through the weekend. Take your time over each area - watering deeply once a week is better for your plants than a shallow sprinkle. This is where a tap timer can come in handy. Attach a seep hose on low flow, set the timer for a half-hour or so and walk away.
Since 2016 we’ve been trialling some of these low-cost, low-tech irrigation systems in community gardens. What we’ve learned so far:
These low-tech, low-cost irrigation options work well on low pressure eg. from a rain tank barrel. These ideas come from David Bainbridge’s fantastic handbook Gardening With Less Water available at Kāpiti libraries.