Radishes are amazingly quick to germinate and grow.. in fact, you can practically see changes every day! Their sharp,peppery flavour and crisp, crunchy texture add the perfect finishing taste in any salad. Radish varieties have evolved over the years from a typical round, bright red root vegetable to several different sizes, colours. If you plant the seed early, it will be one of the first vegetables to harvest each season and can also be planted again in late summer.