STILL going in gardens and boosted by the recent spell of warm weather, a number of forms of persicaria offer a good show of colour through the late summer and into autumn for flower beds and rock ...

KNOXVILLE, Ia. — Officials have confirmed that an invasive Asian weed has reached south-central Iowa. Persicaria perfoliata, or mile-a-minute weed, was known to be in the mid-Atlantic states, Indiana ...