advantages of course, namely that nothing goes to waste, as they grow everything to the exact amounts they need, letting the vegetables go to seed to replant them, using horse manure for fertiliser.
It also means that they can grow varieties of vegetables that can't be bought. "The different coloured carrots, the funky herbs, not what you can nip into Waitrose to pick up," like white strawberries, purple asparagus and Bantam eggs. Things that, once again, make for great conversation with guests.
But that's not to say that more varieties are necessarily better, and the Brexhall farm team learnt this through trial and error, before narrowing it down to a single variety for most vegetables.
"You'd have this table full of the most amazing colours and arrays and shapes and sizes but 55 of them would taste of absolutely nothing."
Does it match the Michelin model?
Another problem one may not consider is that yields can be very inconsistent in size, shape and colour, in ways that fine-dining restaurants - especially those listed in the Michelin Guide - can't justify to their customers.
"Every week your vegetables are growing, you can't stop them growing. So one week we get perfect radishes, and the next week they're footballs, and you've still got to use them because that's your produce."
What's more, he said, you're compromising on consistency by adding things to already finished menus.
It forces you to be inventive: making chutneys, ice creams, pickling, salting things, freezing, purees, juicing, etc.
"But then you're left with the stuff that not everybody wants," he said.
But this begs the question:
If you're not growing it yourself, where do you find the best produce?
Whereas 20 or 30 years ago it may have been difficult to find high quality suppliers, over time you build up a network of dependable partners. Plus, the chefs believe that now, it's more a case of letting them approach you. Thanks to social media, Paul Foster said: "they find you now."
"You're fighting them off."
So perhaps when you consider whether or not you grow your own, it is worth accounting for the amount of extra work, how cost-effective your solution is and whether it gives you the flexibility you need. Otherwise, you may be better off leaving it to the experts.