hile this is a quiet time of year for the gardens at Oxburgh Hall, the 15th-century moated manor in Norfolk, senior gardener Dea Fischer is already busy sowing summer plants from seed. “People automatically think of sowing annuals at this time of year, but it’s also a good time to get some perennials started from seed. Days are lengthening and, although the soil is still too cold to start seeds outside,
