It sounds like a simple question, doesn't it? well it ain't... "When does the growing season start?" Ask five gardeners and you'll get six different answers. The truth is - there's no single hard date. It all depends on what you mean by "growing" and exactly where your patch is in the country. Here's the honest, no-nonsense guide from my garden in Tonbridge. The Official Definition - The "Thermal" Season The Met Office has a proper definition for it. They call it the therma