Get your tickets for the greatest show in Earth at an RHS garden near you.

Where nature puts on an unforgettable performance of colour and fragrance.

The scenery changes many times in one season and our finest trees will happily play the part of.

The best hiding place ever.

Booth.

Put your day out of dreams in the hands of the experts.

It's the greatest show in Earth.

At an RHS garden near you.

Book tickets online for discounts plus under fives go free and under 16 to five pounds.

This is Gardening with the RHS and I'm Fiona Davison.

I don't know about you but in my garden I'm noticing things are coming up at strange times of years. I've got bulbs already breaking through the ground that years ago I wouldn't have expected to see until January.

And I'm not alone. Taking a wider view, since 1906 the global average surface temperature has increased by almost 1 degree Celsius,

and rain and snowfall have increased across the globe on average.

Yet some areas are experiencing more severe droughts, increasing the risk of wildfires, lost crops and shortages of drinking water. And this is what we're going to discuss today,

how our climate is changing, and what it means for us gardeners

and how it will affect wildlife too.

Plus we're investigating what we can do to protect our green spaces in the future.

Let's start with Peter Gibbs.

He's a meteorologist and is here to tell us what climate change means for growers.

So over the course of my lifetime, and I was born in the late 50s,

the average temperature in the UK has increased by around about one degree Celsius. Now that really doesn't sound like very much, does it?

Just one degree. Let's put that in a different context. Over that same period, the growing season

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