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Gardening with the RHS

Wading into wisteria, managing mildew and an existential conundrum

Gardening with the RHS

Royal Horticultural Society

Home & Garden, Leisure, Hobbies

4.4654 Ratings

🗓️ 28 August 2025

⏱️ 34 minutes

🧾️ Download transcript

Summary

Many of us have experienced the surge in powdery mildew, ushered in by the hot, dry summer we’ve had. To find out more about this unwanted fungal force and how to manage it, we’re speaking to RHS Senior Plant Pathologist Dr Jassy Drakulic. Late summer is also the perfect time to prune your wisteria to ensure the best blooms next spring. We’re speaking to this custodian of Wisley’s Wisteria Walk, Liam Anderson to pick up his top tips for success at home. And Nick Turrell returns with a curious question. He’s shining a spotlight on one familiar feature found in almost every garden in the country, asking us to think about why it’s really there. Host: Guy Barter Contributors: Jassy Drakulic, Liam Anderson, Nick Turrell Links: Powdery mildews Pruning Wisteria

Transcript

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0:00.0

I'm walking down the path in my garden and I have a suggestion for you and how you could help with global warming.

0:09.0

With a large lawn I found a simple way of making a big difference.

0:13.0

I sold my ride on mower and bought a top of the range Cress robotic lawnmower.

0:19.0

It runs off rechargeable batteries and uses cutting-edge technology to mow and maintain a lawn this size.

0:25.6

The petrol mower has gone, and with it, the emissions.

0:29.6

I actually don't know why I didn't sell the right on sooner.

0:32.6

With the Cress robotic lawn mower, the lawn is actually looking better.

0:36.6

The tiny grass cuttings fall into the grass roots, helping to fertilise the grass.

0:41.6

And the family doesn't have to put up with the noise and fumes from the ride on.

0:45.8

And I've freed up more of my time to spend with them and in the garden.

0:50.1

It's an easy step.

0:52.0

And you could also be making that change today.

0:55.2

Ask for Cress in your local garden machinery dealer, or visit cress.com.

1:05.0

It may still be late summer, but have you noticed those autumnal reds and golds creeping in early this year?

1:15.6

After one of the hottest, driest summers on record, many trees are showing their autumn colours weeks ahead of schedule.

1:22.6

But what does all this mean? Well, drought places trees under stress, triggering an early version of the same

1:28.7

process that normally happens in autumn. Trees begin shutting down their leaves, pulling valuable

1:34.2

nutrients back into their roots for safekeeping over winter. Normally, this is controlled

1:39.0

by day length and cooler weather in autumn, but when water runs short, trees kickstart the process early.

1:46.0

Most deciduous trees won't regrow leaves until after winter. They need that long cold reset

1:51.5

before bursting back into life in spring. But some, like Japanese maples, don't always play

1:57.1

by the rules and will often produce a fresh set of leaves before their true autumn fall.

...

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