Written by Maggie
Feb 24 2021
Common sneezeweed, scientific name Helenium autumnale, has a height of more than 60cm and leaves like the artilanceolate. Common sneezeweed flowering period can be up to 3 ~ 4 months even in the hot summer. It is a rare flower material for garden planting and container combination planting in hot summer.
Common sneezeweed has broad lanceolate leaves and Flower heads at the top of the stem. The tongues have lemon-yellow flowers with broad petals and notch at the apex. The tubular flowers are greenish-yellow.
The flowering period of Common Rosie zeweed is from summer to autumn and the Fruit ripening period is in autumn.
Common sneezeweed likes warm sunny environments, cold resistance and drought tolerance. The optimum growth temperature ranges from 15°C to 28°C. Common sneezeweed can grow in pastoral soil, sandy loam, slightly alkaline or slightly acidic soil. Sowing and reproduction, generally in sunny beds seedlings, the next spring transplantation, plant row spacing 15×20 cm. Before planting, the land should be turned over and basic fertilizer added, such as bean cakes, sesame paste residue or dried chicken dung. Water once a week during the growing season. Trim the dead leaves of Common sneezeweed after the flowers have faded to encourage bud formation. Common sneezeweed is used for flower bed edges or flower borders in the garden. In recent years, it has been used as ground cover, the effect is very good, the golden leaf is full of vitality.
The medium was mixed with peat, vermiculite (or perlite) and pastoral soil at a ratio of 1∶1∶1, pH value 5.5 ~ 6.5, and proper NPK slow-release fertilizer was added.
Suitable temperature is 19℃ ~ 30℃, Common sneezeweed can withstand a high temperature of 35℃, relatively high temperature is conducive to shortening the growth cycle.
Common sneezeweed is happy with sufficient sunshine and long sunshine. The plants grow less than 12 hours and even appear rosette. It is necessary to add light or use a plant growth regulator to break the rosette.
In addition to the base fertilizer, every week pouring 1 ~ 2 times 200ppm of the whole element compound fertilizer. Common sneezeweed has good branching properties and does not require the use of plant growth regulators. When necessary, 3000-5000ppm B9 can be used to control plant height, which can also help to extend the viewing period.It takes 12 to 14 weeks from sowing to selling.
Seedling in a cuppoint dish: peat and vermiculite were collected from the medium, pH value was 5.8-7.0, EC value was less than 0.75 Siemens/cm. The size of hole plate for Common sneezeweed is 400, 288 and 128.After sowing, cover it with vermiculite. The germination temperature is 18°C-22°C, the germination time is 3-5 days, and the growth temperature is 20°C-22°C. Germination does not require light, and the light gradually increased to 1000-30000Lux after the emergence of cotyledon. Maintain air humidity of 90%-95% until it gradually decreases after cotyledons appear. Keep the medium moist until the radicle appears, and gradually reduce the humidity after the radicle penetrates the medium. Fertilizer 50-75ppm15-0-15 was applied after cotyledon appeared, and the concentration of cotyledon was increased to 100-150ppm after cotyledon expansion. It could be applied alternately with 20-10-20, and the EC value of medium was 1.0-1.2 Siemens/cm. Seedling stage of Common sneezeweed mainly through environmental control and fertilizer and water management to control the plant type, generally do not need to use plant growth regulators. Seedling cycle of Common sneezeweed is 4-6 weeks.
Common sneezeweed enjoys abundant sunshine, and it is easy to cultivate.
Native to North America, Common sneezeweed is distributed throughout the United States and Canada.
Common sneezeweed disease is less, occasionally visible powdery mildew disease, lame stem rot. It can be used 65% generation Sen zinc 600-800 times liquid, 50% fast gram spirit 1000-1200 times liquid spray prevention and control. Common sneezeweed common pests are thrips and aphids, which can be controlled by 1000-1200 times solution of diethoate oxide and imidacloprid respectively.
Common sneezeweed in the Garden as a flower bed edge or flower layout, for ground effect is also good.