What is the optimal planting spacing and density for oil sunflower planting?

Oil sunflower planting spacing

When planting oil sunflowers, the row spacing is about 60 to 65 cm , and the plant spacing is about 25 to 30 cm . For plots with good irrigation conditions, the row spacing can be increased and the plant spacing can be reduced appropriately.

Under good lighting conditions, the yield will increase. The growing period of sunflower is generally 80 to 100 days. The best sowing method is spot sowing, placing two seeds in each hole.

Oil sunflower yield per mu

The yield of sunflower per mu is generally around 200 to 250 kilograms, but the yield will vary greatly depending on the variety, plot or cultivation method.

For example, the yield of the dwarf big-headed sunflower variety H667 is relatively high. It has the characteristics of strong adaptability and high oil yield. Its yield per mu can reach about 300 kilograms per mu, and the highest can reach about 350 kilograms per mu. A good variety of oil sunflower planted in plots with relatively good water and fertilizer conditions can also achieve a yield of 370 kilograms per mu.

Sunflower harvest time

The flowering period of oil sunflower is mostly from July to September every year, and it can bear fruit one month after flowering, so the oil sunflower is mature in August to September every year and can be picked when it is ripe.

In northern Hebei, sunflowers are suitable for planting in June in summer, while in central and southern Hebei, they are suitable for sowing in early March, so the planting and harvesting times will be different in different regions.