Several reliable indicators reveal in-season produce. First, check the price—seasonal items are usually the most affordable. Second, assess availability—in-season foods are displayed prominently and in large quantities at shops and markets. Third, evaluate sensory qualities—truly ripe, seasonal produce has bold colour, pleasant aroma, and firm texture. Fourth, consult UK seasonal produce guides or visit farmers' markets where vendors proudly display what they've grown. Finally, remember that local, UK-grown produce will be in season approximately 2-3 weeks after it first appears at farmers' markets.