Sunflower
In areas of the world with no
winters, sunflower has been planted at any month of the year to obtain satisfactory yields.
In northern regions, highest yields and oil percentages are obtained by planting early - as
soon after the spring-sown small grain crops as possible. In the northern midwest and
Canada this is often May 1 through 20 and mid-March through early April in the southern
USA. Resistance to frost damage decreases as the seedlings develop into the 6leaf stage,
so too-early sowings in the northern USA or Canada can be risky.
A later planting date tends to increase the proportion of linoleic acid in sunflower,
especially at southern locations. Damage of sunflower heads by insect larvae may be
increased by early planting. Test weight tends to decrease with late plantings. A planting
date of early to mid May is recommended in Minnesota and Wisconsin.
C. Method and Rate of Seeding:
A planting depth of 1 to 3.5 in. allows sunflower seeds to reach available moisture and
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