Sunflower production involves a series of
decisions, and one of the most controversial is
optimum date of planting. Planting date affects
not only sunflower growth, but it also affects
the severity of damage from insects and fungi
that feed on sunflower. Planting date recommendations
vary among specialists. Consequently,
recommendations are often generalized to include
a 1- to 2-month period in the northern states.
The sunflower varieties and hybrids grown on
Minnesota farms do not usually require the entire
growing season, so planting dates range
from late April to early July. Research plot
data in this report show the effect of date of
planting on sunflower growth, seed yield, seed
quality, and oil quality. The effect of date of
planting on severity of damage from sunflower
pests is also discussed.
Date-of-planting trials were conducted from
1967 through 1969 with Peredovik, Armavirec, and
Krasnodarets oilseed varieties and Arrowhead,
Mingren, and 66 VI nonoilseed varieties at Rosemount
and Grand Rapids. USDA 894 hybrid was
used from 1982 through 1984 at Grand Rapids,
Crookston, and Morris. Trials were located on
sandy soil at Grand Rapids and on silt loam soil
at the other locations.
Robinson, R.G.; Rabas, D.L.; Wiersma, J.V.; Warnes, D.D..
Sunflower Planting Date: An Important Decision.
Minnesota Agricultural Experiment Station.
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