Unlike Fathen, it prefers warmer regions of New Zealand, and becomes more troublesome the further north you live.
Germination begins late in spring and the plant becomes tall, upright and dense if unmowed. The foliage can appear to have a red tinge, while the stems are green to pinkish, and leaf shapes can appear similar to Galinsoga.
Control
As this is an upright annual, it is susceptible to mowing and is easily controlled by most herbicides.
Find out more about Redroot