Asia from February to November. Precautions Weeds are a frequent problem during growing, but can be eliminated by mulching with compost, grass clippings or similar material. Mulching also helps to hold in soil moisture and protects soil from erosion. Delay in harvesting could cause loss to birds, unless the heads are covered with nylon mesh. After harvest, the sunflowers should be placed to finish drying, hanging the heads upside down in a warm, dry place.
Aphids suck plant juices and in large numbers can cause stunting.
To prepare the seeds for eating, they should be fully dried. After they are fully dry, they should soak overnight in a strong salt water solution. MSU US and Sunflowers. Com Theses pages were written and designed by Stephane Perino at AgenceVirtuelle.