Nuseed has been receiving some questions from people on planting depth for sunflowers. This spring seems to be the opposite problem of recent years as the soil temperatures have warmed up quickly and there isn’t as much moisture (which should mean less chances of downy mildew!).
The happy zone for sunflowers is 1.5 to 2.5 inches. Any grower planting deeper should consider increasing their population to account for possible stand loss.
Confections have a thicker hull than oilseeds and often need a little more moisture than an oilseed to germinate. Confections also tend to struggle the larger the seed and deeper they are planted. Remember that all sunflowers have a woodier hull than most other crops and so not only is soil moisture important, but a good furrow closing is necessary to ensure excellent seed to soil contact.