The more you read of the various Earls' attempts to create beautiful views across their parkland, the more you realise they struggle with the same problems the rest of us face when designing our ownlittle gardens. The only difference is that they're working on a massive scale, and thinking in centuries instead of years ... Raising all his own saplings from seed, he comes across like a real-life version of P. G. Wodehouse's amiable (if unworldly) Lord Emsworth, pottering about with his seed trays and compost in his ancestral kitchen. But he engages fully with the 21st-century threat of global warming, as well as the four new diseases threatening our trees: acute oak decline, sudden oak death, ash dieback and pseudomonas syringae - a lethal canker of horse chestnuts that has infected 49 per cent of the tree species in England, according to a recent survey
