Gardens across Britain are in full bloom during August, but that doesn’t mean it’s too early to start sowing autumnal crops. Those who salad leaves in August generally reap the rewards within just a few weeks, according to one gardener. Niall McCauley suggests gardeners sow corn salad and radishes this month as they’re some of the top performers. “I sow these all the time, they’re such great performers and I’m addicted to growing them,” said Niall. Lamb’s lettuceLamb’s lettuce is an annual that produces spoon-shaped edible leaves that grow up to 15cm long. “Growing corn salad of lamb’s lettuce…