Helen's flower, also known as sneezeweed, is nicknamed because it was used to make snuff. This herbaceous perennial produces blossoms from the late summer through to mid-fall. It can grow from 39 to 60 inches tall with clumps of flowers spreading over 20 inches wide. The blossoms looks like a cross between a daisy and Echinacea in dark golden orange shades. Planted in the late winter or early spring, established Helen's flowers can be divided in fall. Helping established flowers survive winter involves keeping the ground warm and moist throughout the cold months.
Water Helen's flowers on a regular basis as long as they bloom into the fall. They require one inch of water each week, whether through rain or manual watering.
Remove flower stems as they fade. Cut them completely to the ground. Chop up the foliage, and leave it on the ground as a mulch.
Use a plant marker to indicate the location of Helen's flowers. As the flowers will be removed completely by the winter, marking the location of the flowerbed will prevent the perennial from being accidentally disturbed during planting in the coming spring.
Cover the flowerbed with a 2-inch layer of mulch. This will keep the ground nourished and warm.
Keep the ground moist; do not let it dry out throughout the winter. If a heavy snow is due, watering deeply will aid in preventing damage to the roots.