Cannabis and California
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Peter Seabrook fulfils a lifetime ambition by visiting the Californian Spring Trials, where he speaks to Anna Ball, president and chief executive of Ball Horticulture, one of the largest seed breeders and producers on the planet.
While on the road, Peter has learned about the impact of marijuana growth in Canada and how that impacts garden centres. And back home, there\\u2019s advice on potato traps for slugs and scarlet lily beetles.
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